/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 22:57:18,119 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 22:57:18,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 22:57:18,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 22:57:18,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 22:57:18,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 22:57:18,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 22:57:18,140 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 22:57:18,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 22:57:18,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 22:57:18,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 22:57:18,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 22:57:18,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 22:57:18,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 22:57:18,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 22:57:18,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 22:57:18,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 22:57:18,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 22:57:18,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 22:57:18,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 22:57:18,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 22:57:18,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 22:57:18,176 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 22:57:18,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 22:57:18,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 22:57:18,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 22:57:18,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 22:57:18,183 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 22:57:18,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 22:57:18,185 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 22:57:18,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 22:57:18,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 22:57:18,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 22:57:18,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 22:57:18,190 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 22:57:18,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 22:57:18,191 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 22:57:18,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 22:57:18,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 22:57:18,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 22:57:18,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 22:57:18,194 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf [2020-04-17 22:57:18,218 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 22:57:18,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 22:57:18,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 22:57:18,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 22:57:18,222 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 22:57:18,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 22:57:18,222 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 22:57:18,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 22:57:18,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 22:57:18,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 22:57:18,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 22:57:18,223 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 22:57:18,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 22:57:18,224 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 22:57:18,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 22:57:18,224 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 22:57:18,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 22:57:18,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 22:57:18,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 22:57:18,226 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 22:57:18,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 22:57:18,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 22:57:18,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 22:57:18,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 22:57:18,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 22:57:18,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 22:57:18,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 22:57:18,228 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-17 22:57:18,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 22:57:18,229 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 22:57:18,555 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 22:57:18,569 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 22:57:18,572 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 22:57:18,573 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 22:57:18,574 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 22:57:18,574 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2020-04-17 22:57:18,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/675a8195c/803f93b24af647858fe9076ec744b304/FLAGac85f3ee1 [2020-04-17 22:57:19,166 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 22:57:19,167 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2020-04-17 22:57:19,182 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/675a8195c/803f93b24af647858fe9076ec744b304/FLAGac85f3ee1 [2020-04-17 22:57:19,454 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/675a8195c/803f93b24af647858fe9076ec744b304 [2020-04-17 22:57:19,465 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 22:57:19,483 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 22:57:19,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 22:57:19,484 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 22:57:19,487 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 22:57:19,488 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 10:57:19" (1/1) ... [2020-04-17 22:57:19,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d6d203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:19, skipping insertion in model container [2020-04-17 22:57:19,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 10:57:19" (1/1) ... [2020-04-17 22:57:19,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 22:57:19,555 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 22:57:19,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 22:57:19,993 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 22:57:20,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 22:57:20,161 INFO L208 MainTranslator]: Completed translation [2020-04-17 22:57:20,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20 WrapperNode [2020-04-17 22:57:20,162 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 22:57:20,163 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 22:57:20,163 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 22:57:20,163 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 22:57:20,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 22:57:20,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 22:57:20,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 22:57:20,209 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 22:57:20,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,230 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... [2020-04-17 22:57:20,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 22:57:20,235 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 22:57:20,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 22:57:20,236 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 22:57:20,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 22:57:20,297 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 22:57:20,297 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 22:57:20,298 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 22:57:20,298 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 22:57:20,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 22:57:20,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 22:57:20,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 22:57:20,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 22:57:20,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 22:57:20,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 22:57:20,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 22:57:20,303 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 22:57:20,625 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 22:57:20,625 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 22:57:20,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 10:57:20 BoogieIcfgContainer [2020-04-17 22:57:20,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 22:57:20,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 22:57:20,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 22:57:20,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 22:57:20,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 10:57:19" (1/3) ... [2020-04-17 22:57:20,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25110c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 10:57:20, skipping insertion in model container [2020-04-17 22:57:20,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 10:57:20" (2/3) ... [2020-04-17 22:57:20,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25110c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 10:57:20, skipping insertion in model container [2020-04-17 22:57:20,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 10:57:20" (3/3) ... [2020-04-17 22:57:20,649 INFO L109 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2020-04-17 22:57:20,661 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 22:57:20,672 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 22:57:20,687 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 22:57:20,688 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 22:57:20,717 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,718 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,718 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,718 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,719 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,719 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,720 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,720 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,720 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,721 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,721 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,721 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,722 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,722 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,722 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,723 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,723 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,723 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,724 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,724 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,724 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,725 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,725 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,725 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,726 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,726 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,726 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,727 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,727 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,727 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,731 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,731 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,732 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,732 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,732 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,732 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,748 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,749 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,749 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,749 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,749 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,750 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 22:57:20,778 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 22:57:20,796 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 22:57:20,796 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 22:57:20,796 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 22:57:20,796 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 22:57:20,797 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 22:57:20,797 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 22:57:20,797 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 22:57:20,797 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 22:57:20,812 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-04-17 22:57:20,815 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 22:57:20,855 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 22:57:20,856 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 22:57:20,861 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-17 22:57:20,864 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-04-17 22:57:20,883 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-04-17 22:57:20,883 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 22:57:20,884 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-04-17 22:57:20,888 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1032 [2020-04-17 22:57:20,889 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 22:57:22,071 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-04-17 22:57:22,152 INFO L206 etLargeBlockEncoding]: Checked pairs total: 879 [2020-04-17 22:57:22,152 INFO L214 etLargeBlockEncoding]: Total number of compositions: 48 [2020-04-17 22:57:22,156 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-04-17 22:57:22,169 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 22:57:22,171 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 22:57:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 22:57:22,179 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:22,180 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 22:57:22,180 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:22,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:22,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1506398721, now seen corresponding path program 1 times [2020-04-17 22:57:22,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:22,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559420623] [2020-04-17 22:57:22,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:22,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559420623] [2020-04-17 22:57:22,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:22,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 22:57:22,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40167292] [2020-04-17 22:57:22,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 22:57:22,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:22,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 22:57:22,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 22:57:22,491 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 22:57:22,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:22,577 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-04-17 22:57:22,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 22:57:22,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 22:57:22,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:22,601 INFO L225 Difference]: With dead ends: 83 [2020-04-17 22:57:22,601 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 22:57:22,602 INFO L678 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 [2020-04-17 22:57:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 22:57:22,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-04-17 22:57:22,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 22:57:22,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-04-17 22:57:22,660 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-04-17 22:57:22,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:22,660 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-04-17 22:57:22,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 22:57:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-04-17 22:57:22,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 22:57:22,668 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:22,668 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:22,669 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:22,673 INFO L82 PathProgramCache]: Analyzing trace with hash 235327157, now seen corresponding path program 1 times [2020-04-17 22:57:22,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:22,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606487504] [2020-04-17 22:57:22,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:22,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606487504] [2020-04-17 22:57:22,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:22,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:22,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365423652] [2020-04-17 22:57:22,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:57:22,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:22,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:57:22,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:57:22,795 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-04-17 22:57:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:22,888 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-04-17 22:57:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:22,889 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 22:57:22,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:22,891 INFO L225 Difference]: With dead ends: 80 [2020-04-17 22:57:22,891 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 22:57:22,892 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:57:22,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 22:57:22,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-04-17 22:57:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 22:57:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-04-17 22:57:22,901 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-04-17 22:57:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:22,903 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-04-17 22:57:22,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:57:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-04-17 22:57:22,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 22:57:22,904 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:22,904 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:22,904 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:22,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:22,905 INFO L82 PathProgramCache]: Analyzing trace with hash -244746376, now seen corresponding path program 1 times [2020-04-17 22:57:22,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:22,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87301968] [2020-04-17 22:57:22,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:23,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87301968] [2020-04-17 22:57:23,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:23,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:23,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626214153] [2020-04-17 22:57:23,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:57:23,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:23,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:57:23,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:57:23,023 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-04-17 22:57:23,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:23,056 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-04-17 22:57:23,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 22:57:23,058 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 22:57:23,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:23,059 INFO L225 Difference]: With dead ends: 73 [2020-04-17 22:57:23,059 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 22:57:23,060 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:57:23,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 22:57:23,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-04-17 22:57:23,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 22:57:23,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-04-17 22:57:23,069 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-04-17 22:57:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:23,069 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-04-17 22:57:23,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:57:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-04-17 22:57:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 22:57:23,071 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:23,071 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:23,071 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:23,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:23,071 INFO L82 PathProgramCache]: Analyzing trace with hash -244724056, now seen corresponding path program 2 times [2020-04-17 22:57:23,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:23,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754484228] [2020-04-17 22:57:23,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:23,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754484228] [2020-04-17 22:57:23,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:23,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 22:57:23,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779509027] [2020-04-17 22:57:23,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 22:57:23,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:23,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 22:57:23,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-04-17 22:57:23,158 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-04-17 22:57:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:23,232 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-04-17 22:57:23,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:23,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 22:57:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:23,234 INFO L225 Difference]: With dead ends: 86 [2020-04-17 22:57:23,235 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 22:57:23,235 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:57:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 22:57:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-04-17 22:57:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 22:57:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-04-17 22:57:23,245 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-04-17 22:57:23,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:23,245 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-04-17 22:57:23,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 22:57:23,245 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-04-17 22:57:23,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:23,246 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:23,247 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:23,247 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:23,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:23,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1294770680, now seen corresponding path program 2 times [2020-04-17 22:57:23,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:23,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420407827] [2020-04-17 22:57:23,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:23,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420407827] [2020-04-17 22:57:23,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129847546] [2020-04-17 22:57:23,346 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:23,440 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:23,441 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:23,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:23,449 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:23,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:23,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:23,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-04-17 22:57:23,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432499333] [2020-04-17 22:57:23,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 22:57:23,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:23,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 22:57:23,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:57:23,540 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-04-17 22:57:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:23,649 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-04-17 22:57:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:23,650 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-04-17 22:57:23,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:23,651 INFO L225 Difference]: With dead ends: 101 [2020-04-17 22:57:23,652 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 22:57:23,652 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:23,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 22:57:23,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-04-17 22:57:23,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 22:57:23,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-04-17 22:57:23,660 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-04-17 22:57:23,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:23,661 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-04-17 22:57:23,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 22:57:23,661 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-04-17 22:57:23,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:23,662 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:23,662 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:23,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:23,872 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:23,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:23,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1002797622, now seen corresponding path program 3 times [2020-04-17 22:57:23,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:23,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894735099] [2020-04-17 22:57:23,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:23,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894735099] [2020-04-17 22:57:23,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327921799] [2020-04-17 22:57:23,964 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:24,017 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:24,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:24,019 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:24,020 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:24,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:24,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 22:57:24,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779485365] [2020-04-17 22:57:24,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:57:24,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:24,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:57:24,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:24,094 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-04-17 22:57:24,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:24,158 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-04-17 22:57:24,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:57:24,159 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 22:57:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:24,160 INFO L225 Difference]: With dead ends: 84 [2020-04-17 22:57:24,160 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 22:57:24,160 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:24,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 22:57:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-04-17 22:57:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 22:57:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-04-17 22:57:24,168 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-04-17 22:57:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:24,168 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-04-17 22:57:24,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:57:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-04-17 22:57:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:24,169 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:24,169 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:24,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:24,380 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:24,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:24,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1003489542, now seen corresponding path program 4 times [2020-04-17 22:57:24,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:24,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159949018] [2020-04-17 22:57:24,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:24,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159949018] [2020-04-17 22:57:24,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617851234] [2020-04-17 22:57:24,469 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:57:24,521 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:24,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:24,522 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:24,523 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:24,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:24,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 22:57:24,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256850285] [2020-04-17 22:57:24,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:57:24,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:24,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:57:24,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:24,618 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-04-17 22:57:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:24,672 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-04-17 22:57:24,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:24,673 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 22:57:24,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:24,675 INFO L225 Difference]: With dead ends: 90 [2020-04-17 22:57:24,675 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 22:57:24,676 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 22:57:24,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 22:57:24,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-04-17 22:57:24,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 22:57:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-04-17 22:57:24,684 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-04-17 22:57:24,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:24,684 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-04-17 22:57:24,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:57:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-04-17 22:57:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 22:57:24,685 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:24,686 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:24,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:24,890 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:24,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:24,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1003511862, now seen corresponding path program 5 times [2020-04-17 22:57:24,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:24,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870511643] [2020-04-17 22:57:24,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:24,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870511643] [2020-04-17 22:57:24,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033226766] [2020-04-17 22:57:24,941 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:24,995 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:24,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:24,996 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:57:24,997 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:25,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:25,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:25,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-04-17 22:57:25,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561517857] [2020-04-17 22:57:25,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:57:25,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:25,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:57:25,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:25,072 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-04-17 22:57:25,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:25,169 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-04-17 22:57:25,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:25,170 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-04-17 22:57:25,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:25,171 INFO L225 Difference]: With dead ends: 99 [2020-04-17 22:57:25,171 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 22:57:25,171 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:25,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 22:57:25,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-04-17 22:57:25,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 22:57:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-04-17 22:57:25,178 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-04-17 22:57:25,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:25,179 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-04-17 22:57:25,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:57:25,179 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-04-17 22:57:25,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:25,180 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:25,180 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:25,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:25,384 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:25,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:25,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1491235988, now seen corresponding path program 1 times [2020-04-17 22:57:25,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:25,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146514469] [2020-04-17 22:57:25,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:25,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146514469] [2020-04-17 22:57:25,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:25,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:57:25,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429006907] [2020-04-17 22:57:25,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:57:25,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:25,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:57:25,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:25,450 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-04-17 22:57:25,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:25,477 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-04-17 22:57:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 22:57:25,478 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 22:57:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:25,479 INFO L225 Difference]: With dead ends: 92 [2020-04-17 22:57:25,479 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 22:57:25,480 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:25,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 22:57:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-04-17 22:57:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 22:57:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-04-17 22:57:25,485 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-04-17 22:57:25,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:25,486 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-04-17 22:57:25,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:57:25,486 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-04-17 22:57:25,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:25,487 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:25,487 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:25,487 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:25,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:25,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1490572898, now seen corresponding path program 2 times [2020-04-17 22:57:25,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:25,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981757357] [2020-04-17 22:57:25,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:25,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:25,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981757357] [2020-04-17 22:57:25,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:25,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:57:25,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305557661] [2020-04-17 22:57:25,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:57:25,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:25,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:57:25,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:25,552 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-04-17 22:57:25,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:25,600 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-04-17 22:57:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:25,601 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 22:57:25,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:25,601 INFO L225 Difference]: With dead ends: 100 [2020-04-17 22:57:25,602 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 22:57:25,602 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-04-17 22:57:25,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 22:57:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-04-17 22:57:25,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 22:57:25,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-04-17 22:57:25,611 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-04-17 22:57:25,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:25,612 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-04-17 22:57:25,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:57:25,612 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-04-17 22:57:25,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:25,613 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:25,613 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:25,614 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:25,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:25,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1490550578, now seen corresponding path program 3 times [2020-04-17 22:57:25,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:25,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861601672] [2020-04-17 22:57:25,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:25,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861601672] [2020-04-17 22:57:25,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:25,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:57:25,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564138506] [2020-04-17 22:57:25,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:57:25,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:25,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:57:25,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:25,713 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-04-17 22:57:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:25,789 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 22:57:25,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:25,789 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 22:57:25,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:25,791 INFO L225 Difference]: With dead ends: 105 [2020-04-17 22:57:25,791 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 22:57:25,791 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:25,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 22:57:25,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 22:57:25,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 22:57:25,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-04-17 22:57:25,796 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-04-17 22:57:25,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:25,797 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-04-17 22:57:25,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:57:25,797 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-04-17 22:57:25,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:25,798 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:25,798 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:25,798 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:25,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:25,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1490521748, now seen corresponding path program 4 times [2020-04-17 22:57:25,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:25,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144701606] [2020-04-17 22:57:25,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:25,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144701606] [2020-04-17 22:57:25,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 22:57:25,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 22:57:25,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445784535] [2020-04-17 22:57:25,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 22:57:25,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:25,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 22:57:25,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-04-17 22:57:25,851 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-04-17 22:57:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:25,920 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-04-17 22:57:25,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:25,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 22:57:25,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:25,922 INFO L225 Difference]: With dead ends: 105 [2020-04-17 22:57:25,922 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 22:57:25,923 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:25,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 22:57:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-04-17 22:57:25,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 22:57:25,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-04-17 22:57:25,929 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-04-17 22:57:25,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:25,929 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-04-17 22:57:25,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 22:57:25,929 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-04-17 22:57:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:25,930 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:25,930 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:25,930 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:25,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:25,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1483163371, now seen corresponding path program 3 times [2020-04-17 22:57:25,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:25,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653598877] [2020-04-17 22:57:25,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:25,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653598877] [2020-04-17 22:57:25,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921981514] [2020-04-17 22:57:25,993 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:26,045 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:26,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:26,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:26,047 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:26,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:26,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:26,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-04-17 22:57:26,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136496547] [2020-04-17 22:57:26,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 22:57:26,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:26,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 22:57:26,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:26,162 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-04-17 22:57:26,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:26,298 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-04-17 22:57:26,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:26,299 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-04-17 22:57:26,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:26,300 INFO L225 Difference]: With dead ends: 122 [2020-04-17 22:57:26,300 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 22:57:26,301 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:26,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 22:57:26,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-04-17 22:57:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 22:57:26,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-04-17 22:57:26,306 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-04-17 22:57:26,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:26,306 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-04-17 22:57:26,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 22:57:26,306 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-04-17 22:57:26,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:26,309 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:26,310 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:26,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:26,511 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:26,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1021955896, now seen corresponding path program 6 times [2020-04-17 22:57:26,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:26,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122918304] [2020-04-17 22:57:26,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:26,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122918304] [2020-04-17 22:57:26,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052467016] [2020-04-17 22:57:26,613 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:26,687 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:26,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:26,689 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:26,690 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:26,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:26,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:26,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237646688] [2020-04-17 22:57:26,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:26,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:26,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:26,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:26,813 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-04-17 22:57:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:26,900 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-04-17 22:57:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:26,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 22:57:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:26,904 INFO L225 Difference]: With dead ends: 108 [2020-04-17 22:57:26,904 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 22:57:26,905 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:26,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 22:57:26,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-04-17 22:57:26,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-17 22:57:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-04-17 22:57:26,911 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-04-17 22:57:26,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:26,911 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-04-17 22:57:26,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-04-17 22:57:26,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:26,912 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:26,912 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:27,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:27,118 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:27,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:27,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1043405416, now seen corresponding path program 7 times [2020-04-17 22:57:27,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:27,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018983917] [2020-04-17 22:57:27,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:27,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018983917] [2020-04-17 22:57:27,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144180798] [2020-04-17 22:57:27,191 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:27,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:27,264 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:27,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:27,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:27,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059826798] [2020-04-17 22:57:27,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:27,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:27,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:27,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:27,355 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-04-17 22:57:27,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:27,411 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-04-17 22:57:27,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:27,412 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 22:57:27,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:27,413 INFO L225 Difference]: With dead ends: 116 [2020-04-17 22:57:27,413 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 22:57:27,414 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:27,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 22:57:27,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-04-17 22:57:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 22:57:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-04-17 22:57:27,418 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-04-17 22:57:27,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:27,419 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-04-17 22:57:27,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-04-17 22:57:27,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:27,419 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:27,419 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:27,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:27,628 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:27,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:27,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1044097336, now seen corresponding path program 8 times [2020-04-17 22:57:27,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:27,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983922034] [2020-04-17 22:57:27,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:27,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983922034] [2020-04-17 22:57:27,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718284998] [2020-04-17 22:57:27,697 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:27,740 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:27,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:27,741 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:27,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:27,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:27,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:27,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308591457] [2020-04-17 22:57:27,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:27,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:27,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:27,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:27,826 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-04-17 22:57:27,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:27,924 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-04-17 22:57:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:27,925 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 22:57:27,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:27,927 INFO L225 Difference]: With dead ends: 115 [2020-04-17 22:57:27,927 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 22:57:27,928 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 22:57:27,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-04-17 22:57:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 22:57:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-04-17 22:57:27,932 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-04-17 22:57:27,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:27,932 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-04-17 22:57:27,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-04-17 22:57:27,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 22:57:27,933 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:27,933 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:28,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:28,142 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:28,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:28,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1044119656, now seen corresponding path program 9 times [2020-04-17 22:57:28,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:28,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27757483] [2020-04-17 22:57:28,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:28,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27757483] [2020-04-17 22:57:28,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478351256] [2020-04-17 22:57:28,199 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:28,243 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:28,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:28,244 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:28,244 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:28,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:28,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:28,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:28,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543025168] [2020-04-17 22:57:28,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:28,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:28,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:28,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:28,303 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-04-17 22:57:28,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:28,422 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-04-17 22:57:28,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:28,422 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-04-17 22:57:28,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:28,423 INFO L225 Difference]: With dead ends: 124 [2020-04-17 22:57:28,423 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 22:57:28,424 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 22:57:28,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-04-17 22:57:28,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 22:57:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-04-17 22:57:28,428 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-04-17 22:57:28,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:28,428 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-04-17 22:57:28,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:28,429 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-04-17 22:57:28,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:28,429 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:28,429 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:28,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:28,638 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:28,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:28,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1016324353, now seen corresponding path program 5 times [2020-04-17 22:57:28,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:28,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617561655] [2020-04-17 22:57:28,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:28,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617561655] [2020-04-17 22:57:28,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794849631] [2020-04-17 22:57:28,721 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:28,761 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:28,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:28,762 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:28,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:28,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:28,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:28,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061631895] [2020-04-17 22:57:28,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:28,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:28,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:28,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:28,853 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-04-17 22:57:28,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:28,901 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-04-17 22:57:28,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 22:57:28,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:28,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:28,903 INFO L225 Difference]: With dead ends: 113 [2020-04-17 22:57:28,903 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 22:57:28,904 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:28,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 22:57:28,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-04-17 22:57:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-04-17 22:57:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-04-17 22:57:28,908 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-04-17 22:57:28,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:28,908 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-04-17 22:57:28,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:28,908 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-04-17 22:57:28,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:28,909 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:28,909 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:29,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:29,116 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:29,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:29,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1016325314, now seen corresponding path program 6 times [2020-04-17 22:57:29,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:29,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575213717] [2020-04-17 22:57:29,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:29,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575213717] [2020-04-17 22:57:29,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530922363] [2020-04-17 22:57:29,205 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:29,248 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:29,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:29,248 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:29,249 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:29,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:29,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:29,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064912264] [2020-04-17 22:57:29,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:29,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:29,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:29,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:29,316 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-04-17 22:57:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:29,385 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-04-17 22:57:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:29,386 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:29,387 INFO L225 Difference]: With dead ends: 118 [2020-04-17 22:57:29,388 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 22:57:29,388 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:29,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 22:57:29,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-04-17 22:57:29,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-04-17 22:57:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-04-17 22:57:29,393 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-04-17 22:57:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:29,393 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-04-17 22:57:29,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:29,394 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-04-17 22:57:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:29,394 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:29,394 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:29,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:29,599 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:29,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:29,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1016354144, now seen corresponding path program 7 times [2020-04-17 22:57:29,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:29,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261893253] [2020-04-17 22:57:29,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:29,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261893253] [2020-04-17 22:57:29,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888936241] [2020-04-17 22:57:29,673 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:29,719 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:29,720 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:29,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:29,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:29,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071257617] [2020-04-17 22:57:29,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:29,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:29,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:29,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:29,786 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-04-17 22:57:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:29,869 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-04-17 22:57:29,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:29,869 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:29,870 INFO L225 Difference]: With dead ends: 119 [2020-04-17 22:57:29,870 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 22:57:29,871 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:29,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 22:57:29,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-04-17 22:57:29,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 22:57:29,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-04-17 22:57:29,874 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-04-17 22:57:29,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:29,874 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-04-17 22:57:29,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:29,874 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-04-17 22:57:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:29,874 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:29,874 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:30,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:30,075 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:30,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:30,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1036880143, now seen corresponding path program 8 times [2020-04-17 22:57:30,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:30,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416600881] [2020-04-17 22:57:30,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:30,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416600881] [2020-04-17 22:57:30,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504823911] [2020-04-17 22:57:30,161 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:30,213 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:30,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:30,214 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:30,218 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:30,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:30,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:30,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:30,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584568047] [2020-04-17 22:57:30,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:30,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:30,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:30,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:30,309 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-04-17 22:57:30,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:30,388 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-04-17 22:57:30,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:30,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:30,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:30,390 INFO L225 Difference]: With dead ends: 122 [2020-04-17 22:57:30,390 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 22:57:30,390 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 22:57:30,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-04-17 22:57:30,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-04-17 22:57:30,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-04-17 22:57:30,395 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-04-17 22:57:30,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:30,395 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-04-17 22:57:30,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:30,395 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-04-17 22:57:30,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:30,396 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:30,396 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:30,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:30,600 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:30,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:30,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1036881104, now seen corresponding path program 9 times [2020-04-17 22:57:30,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:30,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664966697] [2020-04-17 22:57:30,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:30,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664966697] [2020-04-17 22:57:30,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716123197] [2020-04-17 22:57:30,670 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:30,718 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:30,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:30,719 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:30,721 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:30,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:30,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:30,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846083113] [2020-04-17 22:57:30,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:30,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:30,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:30,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:30,813 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-04-17 22:57:30,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:30,903 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-04-17 22:57:30,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:30,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:30,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:30,904 INFO L225 Difference]: With dead ends: 123 [2020-04-17 22:57:30,905 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 22:57:30,905 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:30,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 22:57:30,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-04-17 22:57:30,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 22:57:30,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-04-17 22:57:30,909 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-04-17 22:57:30,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:30,910 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-04-17 22:57:30,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:30,910 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-04-17 22:57:30,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:30,910 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:30,910 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:31,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:31,114 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:31,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:31,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1037543233, now seen corresponding path program 10 times [2020-04-17 22:57:31,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:31,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901644739] [2020-04-17 22:57:31,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:31,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901644739] [2020-04-17 22:57:31,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795035725] [2020-04-17 22:57:31,180 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:57:31,231 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:31,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:31,232 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:31,232 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:31,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:31,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:31,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591149722] [2020-04-17 22:57:31,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:31,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:31,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:31,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:31,309 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-04-17 22:57:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:31,406 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-04-17 22:57:31,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:31,407 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:31,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:31,408 INFO L225 Difference]: With dead ends: 123 [2020-04-17 22:57:31,408 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 22:57:31,409 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:31,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 22:57:31,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-04-17 22:57:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-04-17 22:57:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-04-17 22:57:31,414 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-04-17 22:57:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:31,415 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-04-17 22:57:31,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:31,415 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-04-17 22:57:31,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:31,418 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:31,418 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:31,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:31,619 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:31,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1037565553, now seen corresponding path program 11 times [2020-04-17 22:57:31,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:31,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523925055] [2020-04-17 22:57:31,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:31,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523925055] [2020-04-17 22:57:31,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007741903] [2020-04-17 22:57:31,694 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:31,737 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:31,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:31,738 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:31,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:31,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:31,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:31,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:31,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580924814] [2020-04-17 22:57:31,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:31,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:31,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:31,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:31,810 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-04-17 22:57:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:31,989 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-04-17 22:57:31,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:31,990 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:31,991 INFO L225 Difference]: With dead ends: 133 [2020-04-17 22:57:31,992 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 22:57:31,992 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:31,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 22:57:31,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-04-17 22:57:31,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-04-17 22:57:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-04-17 22:57:31,997 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-04-17 22:57:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:31,997 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-04-17 22:57:31,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-04-17 22:57:31,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:31,998 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:31,998 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:32,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:32,202 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:32,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:32,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1037573024, now seen corresponding path program 12 times [2020-04-17 22:57:32,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:32,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468066009] [2020-04-17 22:57:32,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:32,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:32,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468066009] [2020-04-17 22:57:32,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192136705] [2020-04-17 22:57:32,251 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:32,293 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:32,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:32,294 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:32,295 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:32,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:32,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:32,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586867158] [2020-04-17 22:57:32,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:32,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:32,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:32,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:32,360 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-04-17 22:57:32,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:32,495 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-04-17 22:57:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:32,495 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:32,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:32,496 INFO L225 Difference]: With dead ends: 127 [2020-04-17 22:57:32,496 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 22:57:32,497 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:32,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 22:57:32,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-04-17 22:57:32,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 22:57:32,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 22:57:32,501 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 22:57:32,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:32,501 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 22:57:32,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:32,501 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 22:57:32,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:32,502 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:32,502 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:32,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:32,705 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:32,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1037594383, now seen corresponding path program 13 times [2020-04-17 22:57:32,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:32,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737975987] [2020-04-17 22:57:32,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:32,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737975987] [2020-04-17 22:57:32,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239865872] [2020-04-17 22:57:32,756 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:32,794 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:32,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:32,848 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:32,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:32,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:32,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195400941] [2020-04-17 22:57:32,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:32,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:32,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:32,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:32,857 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 22:57:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:33,075 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-04-17 22:57:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:57:33,075 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:33,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:33,077 INFO L225 Difference]: With dead ends: 141 [2020-04-17 22:57:33,077 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 22:57:33,078 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:57:33,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 22:57:33,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-04-17 22:57:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-04-17 22:57:33,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-04-17 22:57:33,083 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-04-17 22:57:33,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:33,083 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-04-17 22:57:33,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:33,083 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-04-17 22:57:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:33,084 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:33,084 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:33,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:33,288 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:33,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:33,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1037595344, now seen corresponding path program 14 times [2020-04-17 22:57:33,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:33,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421809285] [2020-04-17 22:57:33,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:33,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421809285] [2020-04-17 22:57:33,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550822960] [2020-04-17 22:57:33,339 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:33,398 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:33,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:33,399 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:33,400 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:33,442 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:33,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:33,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:33,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256578848] [2020-04-17 22:57:33,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:33,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:33,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:33,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:33,450 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-04-17 22:57:33,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:33,610 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-04-17 22:57:33,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:33,610 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:33,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:33,612 INFO L225 Difference]: With dead ends: 136 [2020-04-17 22:57:33,612 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 22:57:33,613 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:33,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 22:57:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-04-17 22:57:33,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 22:57:33,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-04-17 22:57:33,617 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-04-17 22:57:33,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:33,618 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-04-17 22:57:33,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:33,618 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-04-17 22:57:33,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:33,619 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:33,619 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:33,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:33,823 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:33,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:33,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1037803664, now seen corresponding path program 15 times [2020-04-17 22:57:33,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:33,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850958892] [2020-04-17 22:57:33,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:33,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850958892] [2020-04-17 22:57:33,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901612636] [2020-04-17 22:57:33,881 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:33,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:33,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:33,924 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:33,925 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:33,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:33,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:33,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310203610] [2020-04-17 22:57:33,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:33,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:33,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:33,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:33,984 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-04-17 22:57:34,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:34,077 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-04-17 22:57:34,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:34,077 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:34,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:34,078 INFO L225 Difference]: With dead ends: 130 [2020-04-17 22:57:34,078 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 22:57:34,079 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:34,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 22:57:34,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-04-17 22:57:34,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 22:57:34,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 22:57:34,082 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 22:57:34,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:34,083 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 22:57:34,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:34,083 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 22:57:34,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:34,083 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:34,083 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:34,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:34,284 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:34,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:34,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1038466754, now seen corresponding path program 16 times [2020-04-17 22:57:34,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:34,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027206558] [2020-04-17 22:57:34,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:34,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027206558] [2020-04-17 22:57:34,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110894189] [2020-04-17 22:57:34,347 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:57:34,395 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:34,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:34,396 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:34,396 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:34,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:34,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:34,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528938894] [2020-04-17 22:57:34,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:34,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:34,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:34,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:34,477 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 22:57:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:34,615 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-04-17 22:57:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:34,616 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:34,617 INFO L225 Difference]: With dead ends: 131 [2020-04-17 22:57:34,617 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 22:57:34,617 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 22:57:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-04-17 22:57:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 22:57:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 22:57:34,621 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 22:57:34,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:34,622 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 22:57:34,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 22:57:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:34,623 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:34,623 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:34,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:34,826 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:34,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:34,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1038488113, now seen corresponding path program 17 times [2020-04-17 22:57:34,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:34,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215353177] [2020-04-17 22:57:34,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:34,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215353177] [2020-04-17 22:57:34,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480197013] [2020-04-17 22:57:34,895 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:34,957 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:34,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:34,958 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:34,960 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:35,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:35,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:35,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:35,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051986720] [2020-04-17 22:57:35,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:35,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:35,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:35,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:35,028 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 22:57:35,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:35,159 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-04-17 22:57:35,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:35,159 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:35,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:35,160 INFO L225 Difference]: With dead ends: 131 [2020-04-17 22:57:35,160 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 22:57:35,161 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:35,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 22:57:35,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-04-17 22:57:35,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-04-17 22:57:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-04-17 22:57:35,165 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-04-17 22:57:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:35,165 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-04-17 22:57:35,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:35,165 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-04-17 22:57:35,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:35,166 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:35,166 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:35,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:35,370 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:35,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:35,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1038489074, now seen corresponding path program 18 times [2020-04-17 22:57:35,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:35,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321116835] [2020-04-17 22:57:35,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:35,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321116835] [2020-04-17 22:57:35,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46268687] [2020-04-17 22:57:35,418 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:35,461 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:35,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:35,461 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:35,462 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:35,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:35,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:35,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:35,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411892481] [2020-04-17 22:57:35,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:35,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:35,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:35,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:35,525 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-04-17 22:57:35,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:35,734 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-04-17 22:57:35,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:57:35,736 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:35,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:35,737 INFO L225 Difference]: With dead ends: 145 [2020-04-17 22:57:35,737 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 22:57:35,737 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:57:35,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 22:57:35,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-04-17 22:57:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 22:57:35,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-04-17 22:57:35,741 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-04-17 22:57:35,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:35,742 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-04-17 22:57:35,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-04-17 22:57:35,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:35,742 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:35,742 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:35,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:35,946 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:35,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:35,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1038517904, now seen corresponding path program 19 times [2020-04-17 22:57:35,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:35,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873276049] [2020-04-17 22:57:35,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:35,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873276049] [2020-04-17 22:57:35,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375474718] [2020-04-17 22:57:35,997 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:36,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 22:57:36,040 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:36,102 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:36,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:36,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-04-17 22:57:36,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227348447] [2020-04-17 22:57:36,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 22:57:36,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:36,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 22:57:36,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-04-17 22:57:36,112 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-04-17 22:57:36,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:36,316 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-04-17 22:57:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:36,317 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-04-17 22:57:36,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:36,318 INFO L225 Difference]: With dead ends: 135 [2020-04-17 22:57:36,318 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 22:57:36,319 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:36,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 22:57:36,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-04-17 22:57:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 22:57:36,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-04-17 22:57:36,323 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-04-17 22:57:36,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:36,323 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-04-17 22:57:36,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 22:57:36,323 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-04-17 22:57:36,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:36,324 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:36,324 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:36,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:36,527 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:36,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:36,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1266597800, now seen corresponding path program 4 times [2020-04-17 22:57:36,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:36,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705166915] [2020-04-17 22:57:36,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:36,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705166915] [2020-04-17 22:57:36,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243851591] [2020-04-17 22:57:36,593 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:57:36,637 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:36,637 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:36,638 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:36,639 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:36,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:36,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:36,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-04-17 22:57:36,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183085067] [2020-04-17 22:57:36,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 22:57:36,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:36,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 22:57:36,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:36,736 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-04-17 22:57:36,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:36,877 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-04-17 22:57:36,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:36,878 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-04-17 22:57:36,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:36,879 INFO L225 Difference]: With dead ends: 143 [2020-04-17 22:57:36,880 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 22:57:36,880 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:57:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 22:57:36,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-04-17 22:57:36,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-04-17 22:57:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-04-17 22:57:36,885 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-04-17 22:57:36,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:36,885 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-04-17 22:57:36,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 22:57:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-04-17 22:57:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:36,886 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:36,886 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:37,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:37,090 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:37,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:37,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1615862390, now seen corresponding path program 10 times [2020-04-17 22:57:37,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:37,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648291282] [2020-04-17 22:57:37,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:37,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648291282] [2020-04-17 22:57:37,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067920981] [2020-04-17 22:57:37,232 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:57:37,273 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:37,273 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:37,274 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:37,275 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:37,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:37,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:37,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431417585] [2020-04-17 22:57:37,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:37,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:37,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:37,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:37,363 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-04-17 22:57:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:37,404 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-04-17 22:57:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:37,404 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:37,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:37,405 INFO L225 Difference]: With dead ends: 132 [2020-04-17 22:57:37,405 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 22:57:37,406 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:37,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 22:57:37,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-04-17 22:57:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 22:57:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 22:57:37,409 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 22:57:37,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:37,410 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 22:57:37,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:37,410 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 22:57:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:37,410 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:37,411 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:37,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:37,614 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:37,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:37,615 INFO L82 PathProgramCache]: Analyzing trace with hash -2014169786, now seen corresponding path program 11 times [2020-04-17 22:57:37,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:37,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270357387] [2020-04-17 22:57:37,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:37,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270357387] [2020-04-17 22:57:37,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409655808] [2020-04-17 22:57:37,715 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:37,753 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:57:37,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:37,753 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:37,754 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:37,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:37,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:37,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785391186] [2020-04-17 22:57:37,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:37,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:37,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:37,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:37,846 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 22:57:37,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:37,895 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-04-17 22:57:37,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:37,895 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:37,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:37,896 INFO L225 Difference]: With dead ends: 143 [2020-04-17 22:57:37,896 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 22:57:37,896 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:37,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 22:57:37,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-04-17 22:57:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-04-17 22:57:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-04-17 22:57:37,899 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-04-17 22:57:37,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:37,899 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-04-17 22:57:37,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-04-17 22:57:37,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:37,900 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:37,900 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:38,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:38,101 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:38,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:38,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1992720266, now seen corresponding path program 12 times [2020-04-17 22:57:38,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:38,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067502137] [2020-04-17 22:57:38,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:38,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067502137] [2020-04-17 22:57:38,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280017050] [2020-04-17 22:57:38,173 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:38,220 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:57:38,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:38,221 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:38,222 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:38,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:38,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:38,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042134715] [2020-04-17 22:57:38,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:38,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:38,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:38,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:38,313 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-04-17 22:57:38,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:38,417 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-04-17 22:57:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:38,418 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:38,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:38,419 INFO L225 Difference]: With dead ends: 142 [2020-04-17 22:57:38,419 INFO L226 Difference]: Without dead ends: 139 [2020-04-17 22:57:38,420 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:38,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-04-17 22:57:38,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-04-17 22:57:38,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-04-17 22:57:38,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-04-17 22:57:38,425 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-04-17 22:57:38,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:38,425 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-04-17 22:57:38,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:38,425 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-04-17 22:57:38,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:38,426 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:38,426 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:38,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:38,629 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:38,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:38,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1992028346, now seen corresponding path program 13 times [2020-04-17 22:57:38,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:38,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295896383] [2020-04-17 22:57:38,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:38,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295896383] [2020-04-17 22:57:38,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202606481] [2020-04-17 22:57:38,690 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:38,741 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:38,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:38,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:38,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:38,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911138337] [2020-04-17 22:57:38,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:38,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:38,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:38,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:38,832 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-04-17 22:57:38,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:38,952 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-04-17 22:57:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:38,952 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:38,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:38,954 INFO L225 Difference]: With dead ends: 141 [2020-04-17 22:57:38,954 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 22:57:38,954 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:38,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 22:57:38,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-04-17 22:57:38,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 22:57:38,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-04-17 22:57:38,958 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-04-17 22:57:38,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:38,959 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-04-17 22:57:38,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:38,959 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-04-17 22:57:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 22:57:38,959 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:38,960 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:39,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:39,163 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:39,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1992006026, now seen corresponding path program 14 times [2020-04-17 22:57:39,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:39,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433850969] [2020-04-17 22:57:39,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:39,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433850969] [2020-04-17 22:57:39,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433296357] [2020-04-17 22:57:39,214 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:39,269 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:39,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:39,270 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:39,271 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:39,336 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:39,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:39,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:39,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:39,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086164644] [2020-04-17 22:57:39,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:39,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:39,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:39,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:39,350 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-04-17 22:57:39,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:39,510 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 22:57:39,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:39,510 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-04-17 22:57:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:39,512 INFO L225 Difference]: With dead ends: 150 [2020-04-17 22:57:39,512 INFO L226 Difference]: Without dead ends: 144 [2020-04-17 22:57:39,513 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:39,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-04-17 22:57:39,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-04-17 22:57:39,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-04-17 22:57:39,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-04-17 22:57:39,517 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-04-17 22:57:39,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:39,517 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-04-17 22:57:39,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:39,518 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-04-17 22:57:39,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:39,518 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:39,518 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:39,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:39,719 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:39,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:39,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1441283596, now seen corresponding path program 20 times [2020-04-17 22:57:39,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:39,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420903326] [2020-04-17 22:57:39,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:39,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420903326] [2020-04-17 22:57:39,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556931981] [2020-04-17 22:57:39,798 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:39,841 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:39,841 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:39,842 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:39,843 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:39,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:39,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:39,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649153401] [2020-04-17 22:57:39,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:39,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:39,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:39,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:39,935 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-04-17 22:57:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:39,981 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-04-17 22:57:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:57:39,981 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:39,982 INFO L225 Difference]: With dead ends: 138 [2020-04-17 22:57:39,983 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 22:57:39,983 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:39,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 22:57:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-04-17 22:57:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-04-17 22:57:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-04-17 22:57:39,986 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-04-17 22:57:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:39,986 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-04-17 22:57:39,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:39,986 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-04-17 22:57:39,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:39,987 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:39,987 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:40,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:40,190 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:40,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:40,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1441284557, now seen corresponding path program 21 times [2020-04-17 22:57:40,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:40,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911479717] [2020-04-17 22:57:40,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:40,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911479717] [2020-04-17 22:57:40,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423285915] [2020-04-17 22:57:40,262 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:40,300 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:40,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:40,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:40,302 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:40,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:40,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:40,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:40,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901820895] [2020-04-17 22:57:40,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:40,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:40,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:40,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:40,392 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-04-17 22:57:40,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:40,522 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-04-17 22:57:40,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:40,522 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:40,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:40,524 INFO L225 Difference]: With dead ends: 145 [2020-04-17 22:57:40,524 INFO L226 Difference]: Without dead ends: 143 [2020-04-17 22:57:40,524 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:40,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-04-17 22:57:40,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-04-17 22:57:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-04-17 22:57:40,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-04-17 22:57:40,529 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-04-17 22:57:40,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:40,529 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-04-17 22:57:40,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:40,529 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-04-17 22:57:40,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:40,530 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:40,530 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:40,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:40,733 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:40,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:40,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1441313387, now seen corresponding path program 22 times [2020-04-17 22:57:40,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:40,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906772859] [2020-04-17 22:57:40,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:40,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906772859] [2020-04-17 22:57:40,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499584182] [2020-04-17 22:57:40,813 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:57:40,853 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:40,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:40,854 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:40,855 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:40,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:40,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:40,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882037999] [2020-04-17 22:57:40,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:40,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:40,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:40,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:40,925 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-04-17 22:57:41,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:41,084 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-04-17 22:57:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:41,084 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:41,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:41,085 INFO L225 Difference]: With dead ends: 150 [2020-04-17 22:57:41,086 INFO L226 Difference]: Without dead ends: 148 [2020-04-17 22:57:41,086 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-17 22:57:41,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-04-17 22:57:41,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-04-17 22:57:41,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-04-17 22:57:41,090 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-04-17 22:57:41,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:41,090 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-04-17 22:57:41,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:41,091 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-04-17 22:57:41,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:41,091 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:41,092 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:41,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:41,296 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:41,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:41,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1442207117, now seen corresponding path program 23 times [2020-04-17 22:57:41,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:41,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402476146] [2020-04-17 22:57:41,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:41,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402476146] [2020-04-17 22:57:41,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511143416] [2020-04-17 22:57:41,372 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:41,413 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:57:41,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:41,414 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:41,415 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:41,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:41,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:41,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625719660] [2020-04-17 22:57:41,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:41,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:41,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:41,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:41,520 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-04-17 22:57:41,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:41,646 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-04-17 22:57:41,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:41,647 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:41,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:41,648 INFO L225 Difference]: With dead ends: 148 [2020-04-17 22:57:41,648 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 22:57:41,648 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:41,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 22:57:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-04-17 22:57:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:41,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 22:57:41,651 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 22:57:41,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:41,652 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 22:57:41,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:41,652 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 22:57:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:41,653 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:41,653 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:41,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:41,857 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:41,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:41,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1442208078, now seen corresponding path program 24 times [2020-04-17 22:57:41,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:41,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339895787] [2020-04-17 22:57:41,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:41,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339895787] [2020-04-17 22:57:41,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447169990] [2020-04-17 22:57:41,938 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:41,982 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:41,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:41,983 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:41,984 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:42,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:42,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:42,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128717391] [2020-04-17 22:57:42,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:42,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:42,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:42,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:42,094 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 22:57:42,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:42,208 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-04-17 22:57:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:42,208 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:42,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:42,209 INFO L225 Difference]: With dead ends: 149 [2020-04-17 22:57:42,209 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 22:57:42,210 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:42,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 22:57:42,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-04-17 22:57:42,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-04-17 22:57:42,216 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-04-17 22:57:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:42,217 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-04-17 22:57:42,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-04-17 22:57:42,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:42,218 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:42,218 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:42,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:42,422 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:42,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:42,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2078513086, now seen corresponding path program 25 times [2020-04-17 22:57:42,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:42,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018700028] [2020-04-17 22:57:42,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:42,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018700028] [2020-04-17 22:57:42,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684948895] [2020-04-17 22:57:42,578 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:42,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:42,619 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:42,620 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:42,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:42,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:42,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931926789] [2020-04-17 22:57:42,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:42,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:42,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:42,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:42,713 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-04-17 22:57:42,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:42,779 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-04-17 22:57:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:42,780 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:42,785 INFO L225 Difference]: With dead ends: 152 [2020-04-17 22:57:42,785 INFO L226 Difference]: Without dead ends: 150 [2020-04-17 22:57:42,785 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-04-17 22:57:42,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-04-17 22:57:42,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-04-17 22:57:42,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 22:57:42,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-04-17 22:57:42,789 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-04-17 22:57:42,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:42,789 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-04-17 22:57:42,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:42,790 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-04-17 22:57:42,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:42,790 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:42,791 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:42,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:42,995 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:42,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:42,995 INFO L82 PathProgramCache]: Analyzing trace with hash 2078514047, now seen corresponding path program 26 times [2020-04-17 22:57:42,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:42,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405311776] [2020-04-17 22:57:42,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405311776] [2020-04-17 22:57:43,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132102603] [2020-04-17 22:57:43,077 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:43,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:43,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:43,125 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:43,125 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:43,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:43,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600363742] [2020-04-17 22:57:43,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:43,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:43,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:43,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:43,202 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-04-17 22:57:43,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:43,337 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-04-17 22:57:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:43,337 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:43,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:43,339 INFO L225 Difference]: With dead ends: 153 [2020-04-17 22:57:43,339 INFO L226 Difference]: Without dead ends: 151 [2020-04-17 22:57:43,340 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:57:43,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-04-17 22:57:43,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-04-17 22:57:43,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-04-17 22:57:43,343 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-04-17 22:57:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:43,344 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-04-17 22:57:43,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-04-17 22:57:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:43,345 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:43,345 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:43,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:43,548 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:43,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:43,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2078542877, now seen corresponding path program 27 times [2020-04-17 22:57:43,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:43,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706615796] [2020-04-17 22:57:43,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706615796] [2020-04-17 22:57:43,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621965057] [2020-04-17 22:57:43,616 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:43,658 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:43,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:43,659 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:43,660 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:43,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:43,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:43,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221724595] [2020-04-17 22:57:43,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:43,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:43,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:43,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:43,749 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-04-17 22:57:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:43,894 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 22:57:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:43,895 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:43,896 INFO L225 Difference]: With dead ends: 156 [2020-04-17 22:57:43,896 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 22:57:43,896 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:43,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 22:57:43,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-04-17 22:57:43,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 22:57:43,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-04-17 22:57:43,904 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-04-17 22:57:43,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:43,904 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-04-17 22:57:43,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:43,904 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-04-17 22:57:43,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:43,905 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:43,905 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:44,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:44,109 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:44,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:44,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2099068876, now seen corresponding path program 28 times [2020-04-17 22:57:44,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:44,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820689775] [2020-04-17 22:57:44,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:44,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:44,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820689775] [2020-04-17 22:57:44,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506908523] [2020-04-17 22:57:44,190 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:57:44,238 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:44,238 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:44,239 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:44,239 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:44,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:44,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:44,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049039660] [2020-04-17 22:57:44,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:44,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:44,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:44,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:44,320 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-04-17 22:57:44,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:44,401 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-04-17 22:57:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:44,402 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:44,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:44,403 INFO L225 Difference]: With dead ends: 148 [2020-04-17 22:57:44,403 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 22:57:44,403 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:44,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 22:57:44,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-04-17 22:57:44,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:44,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 22:57:44,408 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 22:57:44,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:44,409 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 22:57:44,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:44,409 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 22:57:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:44,409 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:44,409 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:44,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:44,613 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:44,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:44,613 INFO L82 PathProgramCache]: Analyzing trace with hash 2099069837, now seen corresponding path program 29 times [2020-04-17 22:57:44,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:44,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108422977] [2020-04-17 22:57:44,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:44,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108422977] [2020-04-17 22:57:44,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554649287] [2020-04-17 22:57:44,677 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:44,725 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:44,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:44,727 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:44,727 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:44,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:44,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:44,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:44,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159654932] [2020-04-17 22:57:44,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:44,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:44,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:44,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:44,817 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 22:57:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:44,983 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-04-17 22:57:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:44,983 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:44,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:44,984 INFO L225 Difference]: With dead ends: 157 [2020-04-17 22:57:44,985 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 22:57:44,985 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:44,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 22:57:44,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-04-17 22:57:44,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:44,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-04-17 22:57:44,989 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-04-17 22:57:44,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:44,990 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-04-17 22:57:44,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:44,990 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-04-17 22:57:44,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:44,991 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:44,991 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:45,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:45,194 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:45,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:45,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2099731966, now seen corresponding path program 30 times [2020-04-17 22:57:45,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:45,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484712876] [2020-04-17 22:57:45,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:45,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484712876] [2020-04-17 22:57:45,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415672315] [2020-04-17 22:57:45,273 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:45,323 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:45,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:45,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:57:45,324 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:45,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:45,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 22:57:45,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836097361] [2020-04-17 22:57:45,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 22:57:45,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:45,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 22:57:45,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 22:57:45,358 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-04-17 22:57:45,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:45,456 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-04-17 22:57:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:57:45,457 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 22:57:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:45,458 INFO L225 Difference]: With dead ends: 149 [2020-04-17 22:57:45,458 INFO L226 Difference]: Without dead ends: 147 [2020-04-17 22:57:45,459 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-04-17 22:57:45,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-04-17 22:57:45,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-04-17 22:57:45,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 22:57:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 22:57:45,462 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 22:57:45,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:45,463 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 22:57:45,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 22:57:45,463 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 22:57:45,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:45,463 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:45,463 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:45,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:45,664 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:45,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:45,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2099754286, now seen corresponding path program 31 times [2020-04-17 22:57:45,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:45,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387279455] [2020-04-17 22:57:45,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:45,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387279455] [2020-04-17 22:57:45,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560580043] [2020-04-17 22:57:45,722 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:45,788 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:45,789 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:45,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:45,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:45,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:45,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446550011] [2020-04-17 22:57:45,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:45,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:45,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:45,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:45,900 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 22:57:46,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:46,176 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-04-17 22:57:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:46,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:46,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:46,179 INFO L225 Difference]: With dead ends: 164 [2020-04-17 22:57:46,179 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 22:57:46,179 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:57:46,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 22:57:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 22:57:46,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 22:57:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-04-17 22:57:46,184 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-04-17 22:57:46,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:46,184 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-04-17 22:57:46,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:46,185 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-04-17 22:57:46,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:46,185 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:46,186 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:46,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:46,387 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:46,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:46,387 INFO L82 PathProgramCache]: Analyzing trace with hash 2099761757, now seen corresponding path program 32 times [2020-04-17 22:57:46,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:46,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925566280] [2020-04-17 22:57:46,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:46,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925566280] [2020-04-17 22:57:46,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954262352] [2020-04-17 22:57:46,441 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:46,489 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:46,489 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:46,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:46,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:46,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:46,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:46,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342560478] [2020-04-17 22:57:46,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:46,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:46,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:46,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:46,588 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-04-17 22:57:46,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:46,757 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 22:57:46,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:46,757 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:46,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:46,758 INFO L225 Difference]: With dead ends: 156 [2020-04-17 22:57:46,758 INFO L226 Difference]: Without dead ends: 154 [2020-04-17 22:57:46,759 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:57:46,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-04-17 22:57:46,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-04-17 22:57:46,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 22:57:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 22:57:46,763 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 22:57:46,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:46,763 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 22:57:46,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:46,763 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 22:57:46,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:46,764 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:46,764 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:46,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:46,965 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:46,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:46,966 INFO L82 PathProgramCache]: Analyzing trace with hash 2099783116, now seen corresponding path program 33 times [2020-04-17 22:57:46,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:46,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909260831] [2020-04-17 22:57:46,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:47,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909260831] [2020-04-17 22:57:47,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819515511] [2020-04-17 22:57:47,040 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:47,082 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:47,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:47,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:47,083 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:47,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:47,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:47,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:47,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459996682] [2020-04-17 22:57:47,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:47,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:47,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:47,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:47,182 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-04-17 22:57:47,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:47,555 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-04-17 22:57:47,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:57:47,556 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:47,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:47,557 INFO L225 Difference]: With dead ends: 176 [2020-04-17 22:57:47,557 INFO L226 Difference]: Without dead ends: 171 [2020-04-17 22:57:47,558 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:57:47,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-04-17 22:57:47,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-04-17 22:57:47,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-04-17 22:57:47,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-04-17 22:57:47,562 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-04-17 22:57:47,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:47,562 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-04-17 22:57:47,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:47,563 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-04-17 22:57:47,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:47,563 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:47,563 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:47,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:47,767 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:47,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:47,767 INFO L82 PathProgramCache]: Analyzing trace with hash 2099784077, now seen corresponding path program 34 times [2020-04-17 22:57:47,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:47,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863106015] [2020-04-17 22:57:47,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:47,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863106015] [2020-04-17 22:57:47,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782297] [2020-04-17 22:57:47,827 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:57:47,869 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:47,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:47,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:47,871 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:47,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:48,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:48,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-04-17 22:57:48,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530538364] [2020-04-17 22:57:48,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 22:57:48,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:48,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 22:57:48,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=129, Unknown=1, NotChecked=0, Total=182 [2020-04-17 22:57:48,359 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 14 states. [2020-04-17 22:57:48,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:48,596 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-04-17 22:57:48,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:48,597 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-04-17 22:57:48,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:48,598 INFO L225 Difference]: With dead ends: 166 [2020-04-17 22:57:48,598 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 22:57:48,599 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=310, Unknown=1, NotChecked=0, Total=462 [2020-04-17 22:57:48,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 22:57:48,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-04-17 22:57:48,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-04-17 22:57:48,604 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-04-17 22:57:48,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:48,604 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-04-17 22:57:48,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 22:57:48,604 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-04-17 22:57:48,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:48,605 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:48,605 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:48,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:48,808 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:48,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:48,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2099992397, now seen corresponding path program 35 times [2020-04-17 22:57:48,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:48,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488025136] [2020-04-17 22:57:48,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:48,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488025136] [2020-04-17 22:57:48,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096435725] [2020-04-17 22:57:48,865 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:48,917 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:48,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:48,918 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:48,919 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:49,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:49,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:49,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:49,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652645615] [2020-04-17 22:57:49,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:49,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:49,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:49,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:49,043 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-04-17 22:57:49,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:49,261 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-04-17 22:57:49,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:49,262 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:49,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:49,263 INFO L225 Difference]: With dead ends: 163 [2020-04-17 22:57:49,263 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 22:57:49,263 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:57:49,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 22:57:49,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-04-17 22:57:49,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-04-17 22:57:49,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-04-17 22:57:49,266 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-04-17 22:57:49,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:49,267 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-04-17 22:57:49,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:49,267 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-04-17 22:57:49,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:49,267 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:49,267 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:49,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:49,468 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:49,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:49,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2100655487, now seen corresponding path program 36 times [2020-04-17 22:57:49,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:49,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099570810] [2020-04-17 22:57:49,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:49,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099570810] [2020-04-17 22:57:49,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522559572] [2020-04-17 22:57:49,527 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:49,571 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:49,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:49,572 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:49,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:49,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:49,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:49,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696504501] [2020-04-17 22:57:49,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:49,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:49,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:49,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:49,650 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-04-17 22:57:49,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:49,900 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-04-17 22:57:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:57:49,900 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:49,902 INFO L225 Difference]: With dead ends: 170 [2020-04-17 22:57:49,902 INFO L226 Difference]: Without dead ends: 168 [2020-04-17 22:57:49,902 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:57:49,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-04-17 22:57:49,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-04-17 22:57:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-04-17 22:57:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-04-17 22:57:49,905 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-04-17 22:57:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:49,906 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-04-17 22:57:49,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:49,906 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-04-17 22:57:49,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:49,906 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:49,906 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:50,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:50,107 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:50,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2100676846, now seen corresponding path program 37 times [2020-04-17 22:57:50,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:50,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032195788] [2020-04-17 22:57:50,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:50,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032195788] [2020-04-17 22:57:50,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032898812] [2020-04-17 22:57:50,160 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:50,216 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:50,216 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:50,274 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:50,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:50,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:50,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:50,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109296891] [2020-04-17 22:57:50,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:50,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:50,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:50,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:50,289 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-04-17 22:57:50,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:50,581 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-04-17 22:57:50,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:57:50,582 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:50,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:50,583 INFO L225 Difference]: With dead ends: 177 [2020-04-17 22:57:50,583 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 22:57:50,583 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 22:57:50,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 22:57:50,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-04-17 22:57:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-04-17 22:57:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-04-17 22:57:50,586 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-04-17 22:57:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:50,587 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-04-17 22:57:50,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-04-17 22:57:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:50,587 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:50,588 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:50,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:50,789 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:50,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2100677807, now seen corresponding path program 38 times [2020-04-17 22:57:50,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:50,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97239418] [2020-04-17 22:57:50,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:50,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97239418] [2020-04-17 22:57:50,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244001042] [2020-04-17 22:57:50,845 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:50,887 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:50,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:50,887 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:50,888 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:50,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:50,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:50,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:50,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955799965] [2020-04-17 22:57:50,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:50,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:50,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:50,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:50,960 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-04-17 22:57:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:51,302 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-04-17 22:57:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:57:51,302 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:51,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:51,303 INFO L225 Difference]: With dead ends: 190 [2020-04-17 22:57:51,304 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 22:57:51,304 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:57:51,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 22:57:51,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-04-17 22:57:51,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:51,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-04-17 22:57:51,307 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-04-17 22:57:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:51,308 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-04-17 22:57:51,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:51,308 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-04-17 22:57:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:51,308 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:51,308 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:51,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:51,509 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:51,510 INFO L82 PathProgramCache]: Analyzing trace with hash 2100706637, now seen corresponding path program 39 times [2020-04-17 22:57:51,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:51,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524658623] [2020-04-17 22:57:51,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:51,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524658623] [2020-04-17 22:57:51,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435289596] [2020-04-17 22:57:51,563 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:51,617 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:57:51,617 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:51,618 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:51,618 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:51,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:51,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:51,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:51,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769713355] [2020-04-17 22:57:51,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:51,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:51,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:51,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:51,691 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-04-17 22:57:52,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:52,010 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-04-17 22:57:52,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:57:52,011 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:52,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:52,012 INFO L225 Difference]: With dead ends: 180 [2020-04-17 22:57:52,012 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 22:57:52,013 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:57:52,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 22:57:52,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-04-17 22:57:52,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-04-17 22:57:52,016 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-04-17 22:57:52,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:52,016 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-04-17 22:57:52,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:52,016 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-04-17 22:57:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:52,017 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:52,017 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:52,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:52,218 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:52,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:52,218 INFO L82 PathProgramCache]: Analyzing trace with hash 2107142237, now seen corresponding path program 40 times [2020-04-17 22:57:52,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:52,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531384785] [2020-04-17 22:57:52,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:52,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531384785] [2020-04-17 22:57:52,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699062207] [2020-04-17 22:57:52,279 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-17 22:57:52,330 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:52,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:52,331 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:52,332 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:52,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:52,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:52,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248309479] [2020-04-17 22:57:52,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:52,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:52,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:52,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:52,416 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-04-17 22:57:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:52,574 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-04-17 22:57:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:52,575 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:52,576 INFO L225 Difference]: With dead ends: 164 [2020-04-17 22:57:52,576 INFO L226 Difference]: Without dead ends: 162 [2020-04-17 22:57:52,577 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:52,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-04-17 22:57:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-04-17 22:57:52,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-04-17 22:57:52,581 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-04-17 22:57:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:52,581 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-04-17 22:57:52,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:52,581 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-04-17 22:57:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:52,582 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:52,582 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:52,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:52,784 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:52,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:52,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2107143198, now seen corresponding path program 41 times [2020-04-17 22:57:52,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:52,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552653118] [2020-04-17 22:57:52,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:52,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552653118] [2020-04-17 22:57:52,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330550736] [2020-04-17 22:57:52,843 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:52,905 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:52,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:52,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:52,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:52,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:52,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:52,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458351130] [2020-04-17 22:57:52,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:52,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:52,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:52,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:52,996 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-04-17 22:57:53,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:53,130 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-04-17 22:57:53,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:57:53,130 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:53,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:53,132 INFO L225 Difference]: With dead ends: 161 [2020-04-17 22:57:53,132 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 22:57:53,132 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:57:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 22:57:53,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-04-17 22:57:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-04-17 22:57:53,136 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-04-17 22:57:53,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:53,136 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-04-17 22:57:53,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:53,136 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-04-17 22:57:53,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:53,137 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:53,137 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:53,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:53,340 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:53,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:53,340 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698027, now seen corresponding path program 42 times [2020-04-17 22:57:53,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:53,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376614255] [2020-04-17 22:57:53,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:53,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376614255] [2020-04-17 22:57:53,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14029017] [2020-04-17 22:57:53,396 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-04-17 22:57:53,439 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:57:53,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:53,440 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:53,441 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:53,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:53,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:53,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611781982] [2020-04-17 22:57:53,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:53,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:53,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:53,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:53,514 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-04-17 22:57:53,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:53,692 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-04-17 22:57:53,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:57:53,692 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:53,694 INFO L225 Difference]: With dead ends: 165 [2020-04-17 22:57:53,694 INFO L226 Difference]: Without dead ends: 163 [2020-04-17 22:57:53,694 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:57:53,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-04-17 22:57:53,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-04-17 22:57:53,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-04-17 22:57:53,697 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-04-17 22:57:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:53,697 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-04-17 22:57:53,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:53,698 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-04-17 22:57:53,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:53,698 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:53,698 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:53,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:53,899 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:53,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:53,899 INFO L82 PathProgramCache]: Analyzing trace with hash 2127698988, now seen corresponding path program 43 times [2020-04-17 22:57:53,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:53,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532436657] [2020-04-17 22:57:53,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:53,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532436657] [2020-04-17 22:57:53,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188499965] [2020-04-17 22:57:53,958 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:53,998 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:53,999 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:54,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:54,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:54,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9344470] [2020-04-17 22:57:54,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:54,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:54,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:54,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:54,079 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-04-17 22:57:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:54,265 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-04-17 22:57:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:57:54,265 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:54,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:54,267 INFO L225 Difference]: With dead ends: 167 [2020-04-17 22:57:54,267 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 22:57:54,267 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:57:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 22:57:54,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-04-17 22:57:54,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:54,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 22:57:54,271 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 22:57:54,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:54,271 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 22:57:54,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:54,271 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 22:57:54,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:54,272 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:54,272 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:54,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:54,475 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:54,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:54,475 INFO L82 PathProgramCache]: Analyzing trace with hash 2128361117, now seen corresponding path program 44 times [2020-04-17 22:57:54,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:54,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176648132] [2020-04-17 22:57:54,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:54,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176648132] [2020-04-17 22:57:54,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695466630] [2020-04-17 22:57:54,525 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:54,565 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:54,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:54,566 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:54,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:54,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:54,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:54,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041024624] [2020-04-17 22:57:54,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:54,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:54,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:54,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:54,650 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 22:57:54,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:54,886 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-04-17 22:57:54,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:57:54,886 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:54,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:54,888 INFO L225 Difference]: With dead ends: 168 [2020-04-17 22:57:54,888 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 22:57:54,888 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:57:54,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 22:57:54,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-04-17 22:57:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:54,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 22:57:54,891 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 22:57:54,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:54,891 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 22:57:54,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 22:57:54,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:54,892 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:54,892 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:55,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:55,093 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:55,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:55,093 INFO L82 PathProgramCache]: Analyzing trace with hash 2128382476, now seen corresponding path program 45 times [2020-04-17 22:57:55,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:55,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153787643] [2020-04-17 22:57:55,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:55,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153787643] [2020-04-17 22:57:55,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296193049] [2020-04-17 22:57:55,154 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:55,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:57:55,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:55,202 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:55,202 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:55,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:55,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:55,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:55,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720584487] [2020-04-17 22:57:55,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:55,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:55,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:55,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:55,273 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 22:57:55,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:55,472 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-04-17 22:57:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:57:55,473 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:55,474 INFO L225 Difference]: With dead ends: 160 [2020-04-17 22:57:55,474 INFO L226 Difference]: Without dead ends: 155 [2020-04-17 22:57:55,474 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:57:55,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-04-17 22:57:55,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-04-17 22:57:55,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-04-17 22:57:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-04-17 22:57:55,477 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-04-17 22:57:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:55,478 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-04-17 22:57:55,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:55,478 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-04-17 22:57:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:55,478 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:55,479 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:55,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:55,679 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:55,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:55,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2128383437, now seen corresponding path program 46 times [2020-04-17 22:57:55,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:55,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402841626] [2020-04-17 22:57:55,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:55,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:55,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402841626] [2020-04-17 22:57:55,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498942237] [2020-04-17 22:57:55,743 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:55,783 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:55,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:55,784 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:55,785 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:55,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:55,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:55,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:55,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459714561] [2020-04-17 22:57:55,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:55,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:55,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:55,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:55,856 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-04-17 22:57:56,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:56,159 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-04-17 22:57:56,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:57:56,159 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:56,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:56,161 INFO L225 Difference]: With dead ends: 189 [2020-04-17 22:57:56,161 INFO L226 Difference]: Without dead ends: 181 [2020-04-17 22:57:56,161 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:57:56,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-04-17 22:57:56,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-04-17 22:57:56,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-04-17 22:57:56,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-04-17 22:57:56,165 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-04-17 22:57:56,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:56,166 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-04-17 22:57:56,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:56,166 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-04-17 22:57:56,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:56,166 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:56,167 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:56,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:56,370 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:56,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:56,370 INFO L82 PathProgramCache]: Analyzing trace with hash 2128390908, now seen corresponding path program 47 times [2020-04-17 22:57:56,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:56,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52871486] [2020-04-17 22:57:56,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:56,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52871486] [2020-04-17 22:57:56,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031869762] [2020-04-17 22:57:56,423 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:56,465 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:57:56,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:56,466 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:56,466 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:56,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:56,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:56,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413836764] [2020-04-17 22:57:56,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:56,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:56,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:56,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:56,538 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-04-17 22:57:56,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:56,759 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-04-17 22:57:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:57:56,760 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:56,761 INFO L225 Difference]: With dead ends: 169 [2020-04-17 22:57:56,761 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 22:57:56,762 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:57:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 22:57:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-04-17 22:57:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-04-17 22:57:56,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-04-17 22:57:56,765 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-04-17 22:57:56,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:56,766 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-04-17 22:57:56,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:56,766 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-04-17 22:57:56,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:56,766 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:56,766 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:56,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:56,967 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:56,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:56,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2128412267, now seen corresponding path program 48 times [2020-04-17 22:57:56,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:56,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017636299] [2020-04-17 22:57:56,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:57,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:57,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017636299] [2020-04-17 22:57:57,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478702284] [2020-04-17 22:57:57,052 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:57,101 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:57:57,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:57,102 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:57,103 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:57,202 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:57,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:57,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:57,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184539121] [2020-04-17 22:57:57,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:57,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:57,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:57,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:57,210 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-04-17 22:57:57,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:57,514 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-04-17 22:57:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:57:57,515 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:57,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:57,516 INFO L225 Difference]: With dead ends: 192 [2020-04-17 22:57:57,516 INFO L226 Difference]: Without dead ends: 184 [2020-04-17 22:57:57,517 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:57:57,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-04-17 22:57:57,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-04-17 22:57:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-04-17 22:57:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-04-17 22:57:57,520 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-04-17 22:57:57,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:57,520 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-04-17 22:57:57,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:57,520 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-04-17 22:57:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:57,521 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:57,521 INFO L425 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:57,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:57,722 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:57,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:57,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2128413228, now seen corresponding path program 49 times [2020-04-17 22:57:57,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:57,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401703105] [2020-04-17 22:57:57,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:57,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401703105] [2020-04-17 22:57:57,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305261068] [2020-04-17 22:57:57,772 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:57,812 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 22:57:57,812 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:57,867 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:57,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:57,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-04-17 22:57:57,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051348181] [2020-04-17 22:57:57,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 22:57:57,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:57,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 22:57:57,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:57:57,877 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-04-17 22:57:58,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:58,168 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-04-17 22:57:58,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:57:58,169 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-04-17 22:57:58,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:58,170 INFO L225 Difference]: With dead ends: 180 [2020-04-17 22:57:58,171 INFO L226 Difference]: Without dead ends: 175 [2020-04-17 22:57:58,171 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 22:57:58,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-04-17 22:57:58,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-04-17 22:57:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-04-17 22:57:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-04-17 22:57:58,174 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-04-17 22:57:58,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:58,174 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-04-17 22:57:58,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 22:57:58,174 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-04-17 22:57:58,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:58,175 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:58,175 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:58,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:58,378 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:58,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:58,378 INFO L82 PathProgramCache]: Analyzing trace with hash 609848181, now seen corresponding path program 5 times [2020-04-17 22:57:58,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:58,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226997884] [2020-04-17 22:57:58,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:58,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226997884] [2020-04-17 22:57:58,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946788016] [2020-04-17 22:57:58,446 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:58,487 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:57:58,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:58,488 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:57:58,489 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:58,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:57:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:58,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:58,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:57:58,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729283833] [2020-04-17 22:57:58,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:57:58,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:58,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:57:58,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:58,606 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-04-17 22:57:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:58,775 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-04-17 22:57:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:57:58,775 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-04-17 22:57:58,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:58,777 INFO L225 Difference]: With dead ends: 164 [2020-04-17 22:57:58,777 INFO L226 Difference]: Without dead ends: 159 [2020-04-17 22:57:58,777 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:57:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-04-17 22:57:58,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-04-17 22:57:58,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-04-17 22:57:58,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-04-17 22:57:58,780 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-04-17 22:57:58,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:58,780 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-04-17 22:57:58,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:57:58,780 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-04-17 22:57:58,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:58,781 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:58,781 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:58,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:58,982 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:58,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:58,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1447872776, now seen corresponding path program 15 times [2020-04-17 22:57:58,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:58,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984128799] [2020-04-17 22:57:58,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:59,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984128799] [2020-04-17 22:57:59,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971431137] [2020-04-17 22:57:59,090 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:59,128 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:57:59,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:59,129 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:57:59,130 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:59,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:59,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:59,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:57:59,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543036633] [2020-04-17 22:57:59,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:57:59,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:59,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:57:59,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:59,238 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-04-17 22:57:59,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:59,287 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-04-17 22:57:59,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:57:59,287 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:57:59,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:59,289 INFO L225 Difference]: With dead ends: 156 [2020-04-17 22:57:59,289 INFO L226 Difference]: Without dead ends: 153 [2020-04-17 22:57:59,289 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:59,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-04-17 22:57:59,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-04-17 22:57:59,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 22:57:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 22:57:59,292 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 22:57:59,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:59,293 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 22:57:59,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:57:59,293 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 22:57:59,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:59,293 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:59,293 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:57:59,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:59,494 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:57:59,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:57:59,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1985246760, now seen corresponding path program 16 times [2020-04-17 22:57:59,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:57:59,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357433997] [2020-04-17 22:57:59,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:57:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:57:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:59,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357433997] [2020-04-17 22:57:59,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235616385] [2020-04-17 22:57:59,604 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:57:59,642 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:57:59,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:57:59,643 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:57:59,644 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:57:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:57:59,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:57:59,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:57:59,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873459986] [2020-04-17 22:57:59,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:57:59,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:57:59,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:57:59,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:57:59,761 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 22:57:59,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:57:59,839 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-04-17 22:57:59,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:57:59,839 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:57:59,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:57:59,841 INFO L225 Difference]: With dead ends: 170 [2020-04-17 22:57:59,841 INFO L226 Difference]: Without dead ends: 167 [2020-04-17 22:57:59,841 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:57:59,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-04-17 22:57:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-04-17 22:57:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-04-17 22:57:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-04-17 22:57:59,844 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-04-17 22:57:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:57:59,844 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-04-17 22:57:59,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:57:59,844 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-04-17 22:57:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:57:59,845 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:57:59,845 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:00,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:00,047 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:00,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:00,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1644785416, now seen corresponding path program 17 times [2020-04-17 22:58:00,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:00,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749578339] [2020-04-17 22:58:00,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:00,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749578339] [2020-04-17 22:58:00,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267423565] [2020-04-17 22:58:00,149 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:00,189 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:00,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:00,190 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:00,191 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:00,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:00,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:00,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073337599] [2020-04-17 22:58:00,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:00,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:00,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:00,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:00,282 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-04-17 22:58:00,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:00,372 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-04-17 22:58:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:58:00,373 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:00,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:00,374 INFO L225 Difference]: With dead ends: 169 [2020-04-17 22:58:00,374 INFO L226 Difference]: Without dead ends: 166 [2020-04-17 22:58:00,375 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:58:00,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-04-17 22:58:00,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-04-17 22:58:00,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 22:58:00,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-04-17 22:58:00,378 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-04-17 22:58:00,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:00,378 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-04-17 22:58:00,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:00,379 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-04-17 22:58:00,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:58:00,379 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:00,379 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:00,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:00,583 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:00,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:00,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1623335896, now seen corresponding path program 18 times [2020-04-17 22:58:00,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:00,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294200330] [2020-04-17 22:58:00,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:00,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294200330] [2020-04-17 22:58:00,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002886850] [2020-04-17 22:58:00,679 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:00,732 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:58:00,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:00,733 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:00,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:00,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:00,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:00,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503149121] [2020-04-17 22:58:00,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:00,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:00,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:00,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:00,834 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-04-17 22:58:00,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:00,943 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-04-17 22:58:00,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:58:00,944 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:00,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:00,945 INFO L225 Difference]: With dead ends: 168 [2020-04-17 22:58:00,945 INFO L226 Difference]: Without dead ends: 165 [2020-04-17 22:58:00,945 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:58:00,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-04-17 22:58:00,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-04-17 22:58:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 22:58:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-04-17 22:58:00,950 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-04-17 22:58:00,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:00,950 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-04-17 22:58:00,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:00,950 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-04-17 22:58:00,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:58:00,951 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:00,951 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:01,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:01,155 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:01,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:01,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1622643976, now seen corresponding path program 19 times [2020-04-17 22:58:01,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:01,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195682919] [2020-04-17 22:58:01,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:01,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195682919] [2020-04-17 22:58:01,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479040305] [2020-04-17 22:58:01,225 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:01,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:01,264 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:01,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:01,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:01,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437261716] [2020-04-17 22:58:01,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:01,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:01,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:01,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:01,374 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-04-17 22:58:01,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:01,508 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-04-17 22:58:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:01,509 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:01,510 INFO L225 Difference]: With dead ends: 167 [2020-04-17 22:58:01,510 INFO L226 Difference]: Without dead ends: 164 [2020-04-17 22:58:01,510 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:58:01,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-04-17 22:58:01,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-04-17 22:58:01,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 22:58:01,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-04-17 22:58:01,514 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-04-17 22:58:01,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:01,514 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-04-17 22:58:01,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:01,514 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-04-17 22:58:01,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 22:58:01,515 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:01,515 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:01,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:01,719 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:01,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1622621656, now seen corresponding path program 20 times [2020-04-17 22:58:01,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:01,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755439549] [2020-04-17 22:58:01,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:01,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:01,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755439549] [2020-04-17 22:58:01,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6686164] [2020-04-17 22:58:01,838 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:01,909 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:01,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:01,911 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:01,912 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:02,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:02,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:02,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:02,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135971390] [2020-04-17 22:58:02,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:02,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:02,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:02,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:02,058 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-04-17 22:58:02,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:02,293 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-04-17 22:58:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:02,293 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-04-17 22:58:02,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:02,294 INFO L225 Difference]: With dead ends: 176 [2020-04-17 22:58:02,294 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 22:58:02,295 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:02,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 22:58:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-04-17 22:58:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-04-17 22:58:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-04-17 22:58:02,298 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-04-17 22:58:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:02,298 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-04-17 22:58:02,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-04-17 22:58:02,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:02,299 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:02,299 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:02,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:02,502 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:02,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:02,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1730118241, now seen corresponding path program 50 times [2020-04-17 22:58:02,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:02,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611323569] [2020-04-17 22:58:02,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:02,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611323569] [2020-04-17 22:58:02,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683294404] [2020-04-17 22:58:02,586 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:02,634 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:02,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:02,635 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:02,635 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:02,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:02,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:02,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634858328] [2020-04-17 22:58:02,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:02,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:02,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:02,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:02,756 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-04-17 22:58:02,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:02,805 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-04-17 22:58:02,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 22:58:02,805 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:02,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:02,807 INFO L225 Difference]: With dead ends: 163 [2020-04-17 22:58:02,807 INFO L226 Difference]: Without dead ends: 161 [2020-04-17 22:58:02,807 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:02,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-04-17 22:58:02,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-04-17 22:58:02,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 22:58:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-04-17 22:58:02,810 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-04-17 22:58:02,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:02,810 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-04-17 22:58:02,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:02,810 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-04-17 22:58:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:02,811 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:02,811 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:03,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:03,012 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:03,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1730119202, now seen corresponding path program 51 times [2020-04-17 22:58:03,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:03,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445940335] [2020-04-17 22:58:03,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:03,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445940335] [2020-04-17 22:58:03,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750532351] [2020-04-17 22:58:03,095 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:03,136 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:03,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:03,137 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:03,138 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:03,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:03,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:03,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956939748] [2020-04-17 22:58:03,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:03,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:03,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:03,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:03,256 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-04-17 22:58:03,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:03,382 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-04-17 22:58:03,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:58:03,383 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:03,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:03,385 INFO L225 Difference]: With dead ends: 172 [2020-04-17 22:58:03,385 INFO L226 Difference]: Without dead ends: 170 [2020-04-17 22:58:03,385 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:58:03,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-04-17 22:58:03,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-04-17 22:58:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 22:58:03,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 22:58:03,388 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 22:58:03,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:03,388 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 22:58:03,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 22:58:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:03,389 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:03,389 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:03,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:03,592 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:03,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:03,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1730148032, now seen corresponding path program 52 times [2020-04-17 22:58:03,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:03,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270028454] [2020-04-17 22:58:03,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:03,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:03,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270028454] [2020-04-17 22:58:03,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198917780] [2020-04-17 22:58:03,668 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:03,708 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:03,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:03,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:03,710 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:03,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:03,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:03,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:03,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470464307] [2020-04-17 22:58:03,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:03,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:03,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:03,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:03,849 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 22:58:04,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:04,031 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 22:58:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:58:04,032 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:04,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:04,033 INFO L225 Difference]: With dead ends: 179 [2020-04-17 22:58:04,033 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 22:58:04,034 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:58:04,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 22:58:04,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-04-17 22:58:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-04-17 22:58:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-04-17 22:58:04,038 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-04-17 22:58:04,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:04,038 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-04-17 22:58:04,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-04-17 22:58:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:04,039 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:04,039 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:04,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:04,242 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:04,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:04,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041762, now seen corresponding path program 53 times [2020-04-17 22:58:04,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:04,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526447592] [2020-04-17 22:58:04,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:04,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526447592] [2020-04-17 22:58:04,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031565952] [2020-04-17 22:58:04,321 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:04,368 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:04,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:04,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:04,369 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:04,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:04,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:04,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572469393] [2020-04-17 22:58:04,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:04,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:04,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:04,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:04,468 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-04-17 22:58:04,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:04,642 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-04-17 22:58:04,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:58:04,643 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:04,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:04,645 INFO L225 Difference]: With dead ends: 179 [2020-04-17 22:58:04,645 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 22:58:04,645 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:04,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 22:58:04,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-04-17 22:58:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 22:58:04,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-04-17 22:58:04,648 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-04-17 22:58:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:04,648 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-04-17 22:58:04,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-04-17 22:58:04,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:04,648 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:04,648 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:04,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:04,849 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:04,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:04,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1731042723, now seen corresponding path program 54 times [2020-04-17 22:58:04,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:04,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71753782] [2020-04-17 22:58:04,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:04,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71753782] [2020-04-17 22:58:04,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354083769] [2020-04-17 22:58:04,920 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:04,961 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:04,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:04,962 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:04,962 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:05,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:05,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:05,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684975756] [2020-04-17 22:58:05,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:05,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:05,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:05,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:05,056 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-04-17 22:58:05,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:05,247 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-04-17 22:58:05,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:05,247 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:05,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:05,249 INFO L225 Difference]: With dead ends: 184 [2020-04-17 22:58:05,249 INFO L226 Difference]: Without dead ends: 182 [2020-04-17 22:58:05,249 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-04-17 22:58:05,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-04-17 22:58:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 22:58:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-04-17 22:58:05,252 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-04-17 22:58:05,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:05,253 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-04-17 22:58:05,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:05,253 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-04-17 22:58:05,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:05,253 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:05,253 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:05,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:05,457 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:05,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:05,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1731071553, now seen corresponding path program 55 times [2020-04-17 22:58:05,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:05,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192929000] [2020-04-17 22:58:05,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:05,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192929000] [2020-04-17 22:58:05,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937943133] [2020-04-17 22:58:05,550 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:05,590 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:05,591 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:06,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:06,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:06,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220321995] [2020-04-17 22:58:06,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:06,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:06,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:06,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:06,108 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-04-17 22:58:06,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:06,291 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-04-17 22:58:06,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:06,292 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:06,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:06,293 INFO L225 Difference]: With dead ends: 179 [2020-04-17 22:58:06,294 INFO L226 Difference]: Without dead ends: 177 [2020-04-17 22:58:06,294 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:06,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-04-17 22:58:06,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-04-17 22:58:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-04-17 22:58:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-04-17 22:58:06,298 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-04-17 22:58:06,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:06,298 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-04-17 22:58:06,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:06,298 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-04-17 22:58:06,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:06,299 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:06,299 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:06,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:06,502 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:06,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:06,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1758747392, now seen corresponding path program 56 times [2020-04-17 22:58:06,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:06,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579941977] [2020-04-17 22:58:06,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:06,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579941977] [2020-04-17 22:58:06,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109200865] [2020-04-17 22:58:06,585 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:06,627 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:06,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:06,627 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:06,628 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:06,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:06,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:06,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078102672] [2020-04-17 22:58:06,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:06,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:06,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:06,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:06,742 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-04-17 22:58:06,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:06,879 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-04-17 22:58:06,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:58:06,879 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:06,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:06,881 INFO L225 Difference]: With dead ends: 176 [2020-04-17 22:58:06,881 INFO L226 Difference]: Without dead ends: 174 [2020-04-17 22:58:06,881 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:58:06,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-04-17 22:58:06,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-04-17 22:58:06,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:58:06,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-04-17 22:58:06,884 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-04-17 22:58:06,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:06,885 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-04-17 22:58:06,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:06,885 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-04-17 22:58:06,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:06,885 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:06,885 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:07,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:07,086 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:07,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:07,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1758748353, now seen corresponding path program 57 times [2020-04-17 22:58:07,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:07,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353150536] [2020-04-17 22:58:07,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:07,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353150536] [2020-04-17 22:58:07,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018405315] [2020-04-17 22:58:07,171 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:07,221 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:58:07,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:07,221 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:07,222 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:07,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:07,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:07,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585835501] [2020-04-17 22:58:07,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:07,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:07,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:07,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:07,491 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-04-17 22:58:07,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:07,688 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 22:58:07,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:07,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:07,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:07,690 INFO L225 Difference]: With dead ends: 185 [2020-04-17 22:58:07,690 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 22:58:07,690 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 22:58:07,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-04-17 22:58:07,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:07,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-04-17 22:58:07,694 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-04-17 22:58:07,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:07,694 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-04-17 22:58:07,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-04-17 22:58:07,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:07,695 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:07,695 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:07,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:07,899 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:07,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:07,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1758777183, now seen corresponding path program 58 times [2020-04-17 22:58:07,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:07,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141188196] [2020-04-17 22:58:07,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:07,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:07,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141188196] [2020-04-17 22:58:07,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587003647] [2020-04-17 22:58:07,999 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:08,042 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:08,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:08,043 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:08,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:08,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:08,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:08,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204935080] [2020-04-17 22:58:08,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:08,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:08,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:08,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:08,136 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-04-17 22:58:08,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:08,340 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-04-17 22:58:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:08,340 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:08,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:08,342 INFO L225 Difference]: With dead ends: 185 [2020-04-17 22:58:08,342 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 22:58:08,342 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 22:58:08,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-04-17 22:58:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-04-17 22:58:08,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-04-17 22:58:08,346 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-04-17 22:58:08,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:08,347 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-04-17 22:58:08,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:08,347 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-04-17 22:58:08,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:08,348 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:08,348 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:08,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:08,552 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:08,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:08,553 INFO L82 PathProgramCache]: Analyzing trace with hash 9395951, now seen corresponding path program 59 times [2020-04-17 22:58:08,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:08,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464804322] [2020-04-17 22:58:08,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:08,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464804322] [2020-04-17 22:58:08,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617767525] [2020-04-17 22:58:08,668 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:08,709 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:08,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:08,710 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:08,711 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:08,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:08,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:08,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827868681] [2020-04-17 22:58:08,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:08,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:08,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:08,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:08,818 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-04-17 22:58:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:08,883 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-04-17 22:58:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:58:08,884 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:08,885 INFO L225 Difference]: With dead ends: 182 [2020-04-17 22:58:08,885 INFO L226 Difference]: Without dead ends: 180 [2020-04-17 22:58:08,886 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-04-17 22:58:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-04-17 22:58:08,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-04-17 22:58:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:58:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-04-17 22:58:08,889 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-04-17 22:58:08,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:08,890 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-04-17 22:58:08,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:08,890 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-04-17 22:58:08,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:08,891 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:08,891 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:09,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:09,092 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:09,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:09,092 INFO L82 PathProgramCache]: Analyzing trace with hash 9396912, now seen corresponding path program 60 times [2020-04-17 22:58:09,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:09,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310528543] [2020-04-17 22:58:09,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:09,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:09,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310528543] [2020-04-17 22:58:09,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379306062] [2020-04-17 22:58:09,206 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:09,259 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:09,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:09,260 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:09,260 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:09,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:09,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:09,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112261078] [2020-04-17 22:58:09,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:09,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:09,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:09,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:09,375 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-04-17 22:58:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:09,527 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-04-17 22:58:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:58:09,528 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:09,529 INFO L225 Difference]: With dead ends: 185 [2020-04-17 22:58:09,530 INFO L226 Difference]: Without dead ends: 183 [2020-04-17 22:58:09,530 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-04-17 22:58:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-04-17 22:58:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-04-17 22:58:09,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:09,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 22:58:09,533 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 22:58:09,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:09,534 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 22:58:09,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:09,534 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 22:58:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:09,534 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:09,534 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:09,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:09,735 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:09,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:09,736 INFO L82 PathProgramCache]: Analyzing trace with hash 9425742, now seen corresponding path program 61 times [2020-04-17 22:58:09,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:09,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022641554] [2020-04-17 22:58:09,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:09,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022641554] [2020-04-17 22:58:09,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440689802] [2020-04-17 22:58:09,825 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:09,873 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:09,873 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:09,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:09,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:09,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390200657] [2020-04-17 22:58:09,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:09,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:09,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:09,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:09,997 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:10,208 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-04-17 22:58:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:58:10,209 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:10,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:10,210 INFO L225 Difference]: With dead ends: 191 [2020-04-17 22:58:10,210 INFO L226 Difference]: Without dead ends: 189 [2020-04-17 22:58:10,211 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:10,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-04-17 22:58:10,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-04-17 22:58:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:10,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-04-17 22:58:10,214 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-04-17 22:58:10,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:10,214 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-04-17 22:58:10,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:10,214 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-04-17 22:58:10,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:10,214 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:10,215 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:10,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:10,416 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:10,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:10,416 INFO L82 PathProgramCache]: Analyzing trace with hash 10319472, now seen corresponding path program 62 times [2020-04-17 22:58:10,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:10,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441574523] [2020-04-17 22:58:10,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:10,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441574523] [2020-04-17 22:58:10,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393851756] [2020-04-17 22:58:10,492 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:10,534 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:10,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:10,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:10,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:10,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:10,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:10,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441876289] [2020-04-17 22:58:10,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:10,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:10,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:10,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:10,624 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-04-17 22:58:10,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:10,829 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-04-17 22:58:10,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:10,836 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:10,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:10,838 INFO L225 Difference]: With dead ends: 187 [2020-04-17 22:58:10,838 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 22:58:10,838 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:10,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 22:58:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-04-17 22:58:10,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:10,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-04-17 22:58:10,841 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-04-17 22:58:10,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:10,842 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-04-17 22:58:10,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:10,842 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-04-17 22:58:10,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:10,842 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:10,843 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:11,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:11,046 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:11,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:11,047 INFO L82 PathProgramCache]: Analyzing trace with hash 10320433, now seen corresponding path program 63 times [2020-04-17 22:58:11,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:11,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048100561] [2020-04-17 22:58:11,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:11,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:11,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048100561] [2020-04-17 22:58:11,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553161969] [2020-04-17 22:58:11,114 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:11,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:11,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:11,158 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:11,159 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:11,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:11,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:11,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933083834] [2020-04-17 22:58:11,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:11,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:11,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:11,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:11,254 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:11,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:11,472 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-04-17 22:58:11,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:11,473 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:11,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:11,475 INFO L225 Difference]: With dead ends: 198 [2020-04-17 22:58:11,475 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 22:58:11,475 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:11,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 22:58:11,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-04-17 22:58:11,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:11,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-04-17 22:58:11,478 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-04-17 22:58:11,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:11,479 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-04-17 22:58:11,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:11,479 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-04-17 22:58:11,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:11,479 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:11,479 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:11,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:11,680 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:11,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:11,681 INFO L82 PathProgramCache]: Analyzing trace with hash 10349263, now seen corresponding path program 64 times [2020-04-17 22:58:11,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:11,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182275814] [2020-04-17 22:58:11,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:11,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:11,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182275814] [2020-04-17 22:58:11,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86215882] [2020-04-17 22:58:11,757 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:11,798 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:11,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:11,798 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:11,799 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:12,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:12,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:12,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071819712] [2020-04-17 22:58:12,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:12,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:12,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:12,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:12,323 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-04-17 22:58:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:12,558 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-04-17 22:58:12,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:12,559 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:12,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:12,560 INFO L225 Difference]: With dead ends: 189 [2020-04-17 22:58:12,560 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 22:58:12,561 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:12,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 22:58:12,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-04-17 22:58:12,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:58:12,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-04-17 22:58:12,564 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-04-17 22:58:12,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:12,564 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-04-17 22:58:12,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:12,564 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-04-17 22:58:12,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:12,565 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:12,565 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:12,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:12,765 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:12,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:12,766 INFO L82 PathProgramCache]: Analyzing trace with hash 646625441, now seen corresponding path program 65 times [2020-04-17 22:58:12,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:12,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288526094] [2020-04-17 22:58:12,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:12,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288526094] [2020-04-17 22:58:12,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702670238] [2020-04-17 22:58:12,865 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:12,905 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:12,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:12,906 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:12,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:13,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:13,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:13,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897338745] [2020-04-17 22:58:13,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:13,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:13,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:13,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:13,008 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-04-17 22:58:13,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:13,096 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-04-17 22:58:13,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:58:13,096 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:13,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:13,098 INFO L225 Difference]: With dead ends: 178 [2020-04-17 22:58:13,098 INFO L226 Difference]: Without dead ends: 176 [2020-04-17 22:58:13,098 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:58:13,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-04-17 22:58:13,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-04-17 22:58:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-04-17 22:58:13,101 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-04-17 22:58:13,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:13,101 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-04-17 22:58:13,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-04-17 22:58:13,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:13,101 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:13,101 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:13,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:13,302 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:13,303 INFO L82 PathProgramCache]: Analyzing trace with hash 646626402, now seen corresponding path program 66 times [2020-04-17 22:58:13,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:13,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660338978] [2020-04-17 22:58:13,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:13,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660338978] [2020-04-17 22:58:13,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735428503] [2020-04-17 22:58:13,389 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:13,430 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:13,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:13,430 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:13,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:13,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:13,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:13,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424414541] [2020-04-17 22:58:13,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:13,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:13,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:13,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:13,527 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-04-17 22:58:13,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:13,705 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-04-17 22:58:13,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:13,706 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:13,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:13,707 INFO L225 Difference]: With dead ends: 193 [2020-04-17 22:58:13,707 INFO L226 Difference]: Without dead ends: 191 [2020-04-17 22:58:13,708 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:58:13,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-04-17 22:58:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-04-17 22:58:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-04-17 22:58:13,711 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-04-17 22:58:13,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:13,711 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-04-17 22:58:13,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:13,711 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-04-17 22:58:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:13,712 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:13,712 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:13,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:13,913 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:13,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:13,913 INFO L82 PathProgramCache]: Analyzing trace with hash 646655232, now seen corresponding path program 67 times [2020-04-17 22:58:13,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:13,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626368605] [2020-04-17 22:58:13,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:13,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626368605] [2020-04-17 22:58:13,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202744158] [2020-04-17 22:58:13,984 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:14,027 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:14,028 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:14,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:14,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:14,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135287695] [2020-04-17 22:58:14,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:14,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:14,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:14,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:14,144 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-04-17 22:58:14,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:14,376 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-04-17 22:58:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:14,376 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:14,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:14,378 INFO L225 Difference]: With dead ends: 195 [2020-04-17 22:58:14,378 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 22:58:14,378 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:58:14,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 22:58:14,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-04-17 22:58:14,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:14,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-04-17 22:58:14,382 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-04-17 22:58:14,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:14,382 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-04-17 22:58:14,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:14,382 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-04-17 22:58:14,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:14,383 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:14,383 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:14,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:14,586 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:14,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:14,586 INFO L82 PathProgramCache]: Analyzing trace with hash 667181231, now seen corresponding path program 68 times [2020-04-17 22:58:14,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:14,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135707856] [2020-04-17 22:58:14,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:14,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135707856] [2020-04-17 22:58:14,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092890521] [2020-04-17 22:58:14,673 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:14,734 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:14,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:14,735 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:14,736 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:14,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:14,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:14,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553122028] [2020-04-17 22:58:14,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:14,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:14,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:14,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:14,856 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-04-17 22:58:14,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:14,965 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-04-17 22:58:14,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:58:14,966 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:14,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:14,967 INFO L225 Difference]: With dead ends: 174 [2020-04-17 22:58:14,967 INFO L226 Difference]: Without dead ends: 172 [2020-04-17 22:58:14,967 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:58:14,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-04-17 22:58:14,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-04-17 22:58:14,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:14,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-04-17 22:58:14,970 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-04-17 22:58:14,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:14,970 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-04-17 22:58:14,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:14,970 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-04-17 22:58:14,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:14,970 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:14,970 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:15,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:15,171 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:15,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:15,172 INFO L82 PathProgramCache]: Analyzing trace with hash 667182192, now seen corresponding path program 69 times [2020-04-17 22:58:15,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:15,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128077324] [2020-04-17 22:58:15,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:15,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128077324] [2020-04-17 22:58:15,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753411869] [2020-04-17 22:58:15,248 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:15,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:15,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:15,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:15,300 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:15,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:15,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:15,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002450241] [2020-04-17 22:58:15,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:15,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:15,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:15,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:15,398 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-04-17 22:58:15,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:15,602 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-04-17 22:58:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:15,602 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:15,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:15,604 INFO L225 Difference]: With dead ends: 189 [2020-04-17 22:58:15,604 INFO L226 Difference]: Without dead ends: 187 [2020-04-17 22:58:15,604 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:58:15,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-04-17 22:58:15,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-04-17 22:58:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-04-17 22:58:15,607 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-04-17 22:58:15,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:15,607 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-04-17 22:58:15,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:15,608 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-04-17 22:58:15,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:15,608 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:15,608 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:15,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:15,809 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:15,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:15,809 INFO L82 PathProgramCache]: Analyzing trace with hash 667844321, now seen corresponding path program 70 times [2020-04-17 22:58:15,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:15,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446070389] [2020-04-17 22:58:15,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:15,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:15,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446070389] [2020-04-17 22:58:15,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100232710] [2020-04-17 22:58:15,886 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:15,927 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:15,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:15,928 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:15,928 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:16,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:16,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:16,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961078395] [2020-04-17 22:58:16,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:16,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:16,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:16,028 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-04-17 22:58:16,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:16,163 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-04-17 22:58:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:58:16,164 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:16,165 INFO L225 Difference]: With dead ends: 175 [2020-04-17 22:58:16,165 INFO L226 Difference]: Without dead ends: 173 [2020-04-17 22:58:16,165 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-04-17 22:58:16,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-04-17 22:58:16,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-04-17 22:58:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 22:58:16,168 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 22:58:16,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:16,169 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 22:58:16,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 22:58:16,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:16,169 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:16,169 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:16,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:16,370 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:16,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:16,371 INFO L82 PathProgramCache]: Analyzing trace with hash 667866641, now seen corresponding path program 71 times [2020-04-17 22:58:16,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:16,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937467081] [2020-04-17 22:58:16,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:16,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937467081] [2020-04-17 22:58:16,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490960710] [2020-04-17 22:58:16,433 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:16,473 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:16,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:16,474 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:16,474 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:16,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:16,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:16,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:16,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519323277] [2020-04-17 22:58:16,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:16,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:16,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:16,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:16,567 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:16,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:16,862 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-04-17 22:58:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:16,862 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:16,864 INFO L225 Difference]: With dead ends: 195 [2020-04-17 22:58:16,864 INFO L226 Difference]: Without dead ends: 190 [2020-04-17 22:58:16,864 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:58:16,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-04-17 22:58:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-04-17 22:58:16,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:16,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 22:58:16,867 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 22:58:16,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:16,868 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 22:58:16,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:16,868 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 22:58:16,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:16,868 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:16,868 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:17,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:17,070 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:17,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:17,070 INFO L82 PathProgramCache]: Analyzing trace with hash 667874112, now seen corresponding path program 72 times [2020-04-17 22:58:17,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:17,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538850622] [2020-04-17 22:58:17,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:17,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538850622] [2020-04-17 22:58:17,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248152585] [2020-04-17 22:58:17,129 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:17,171 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:17,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:17,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:17,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:17,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:17,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:17,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865709156] [2020-04-17 22:58:17,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:17,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:17,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:17,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:17,285 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-04-17 22:58:17,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:17,501 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-04-17 22:58:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:58:17,501 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:17,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:17,503 INFO L225 Difference]: With dead ends: 187 [2020-04-17 22:58:17,503 INFO L226 Difference]: Without dead ends: 185 [2020-04-17 22:58:17,503 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:17,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-04-17 22:58:17,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-04-17 22:58:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:17,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 22:58:17,507 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 22:58:17,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:17,507 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 22:58:17,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:17,507 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 22:58:17,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:17,508 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:17,508 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:17,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:17,710 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:17,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:17,710 INFO L82 PathProgramCache]: Analyzing trace with hash 667895471, now seen corresponding path program 73 times [2020-04-17 22:58:17,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:17,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667523900] [2020-04-17 22:58:17,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:17,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667523900] [2020-04-17 22:58:17,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515614202] [2020-04-17 22:58:17,772 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:17,815 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:17,815 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:18,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:18,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:18,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:18,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861301039] [2020-04-17 22:58:18,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:18,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:18,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:18,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=140, Unknown=1, NotChecked=0, Total=210 [2020-04-17 22:58:18,307 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:18,886 WARN L192 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-04-17 22:58:19,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:19,065 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-04-17 22:58:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:58:19,066 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:19,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:19,068 INFO L225 Difference]: With dead ends: 212 [2020-04-17 22:58:19,068 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 22:58:19,068 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=507, Unknown=1, NotChecked=0, Total=756 [2020-04-17 22:58:19,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 22:58:19,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-04-17 22:58:19,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:19,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 22:58:19,072 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 22:58:19,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:19,073 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 22:58:19,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:19,073 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 22:58:19,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:19,073 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:19,073 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:19,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:19,276 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:19,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:19,277 INFO L82 PathProgramCache]: Analyzing trace with hash 667896432, now seen corresponding path program 74 times [2020-04-17 22:58:19,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:19,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766376307] [2020-04-17 22:58:19,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:19,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766376307] [2020-04-17 22:58:19,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661125036] [2020-04-17 22:58:19,338 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:19,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:19,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:19,382 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:19,383 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:19,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:19,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:19,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:58:19,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880104312] [2020-04-17 22:58:19,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:58:19,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:19,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:58:19,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 22:58:19,869 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 16 states. [2020-04-17 22:58:20,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:20,187 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-04-17 22:58:20,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:20,188 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 22:58:20,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:20,190 INFO L225 Difference]: With dead ends: 202 [2020-04-17 22:58:20,190 INFO L226 Difference]: Without dead ends: 197 [2020-04-17 22:58:20,190 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=441, Unknown=1, NotChecked=0, Total=650 [2020-04-17 22:58:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-04-17 22:58:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-04-17 22:58:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-04-17 22:58:20,194 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-04-17 22:58:20,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:20,194 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-04-17 22:58:20,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:58:20,194 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-04-17 22:58:20,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:20,195 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:20,195 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:20,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:20,395 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:20,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:20,396 INFO L82 PathProgramCache]: Analyzing trace with hash 668104752, now seen corresponding path program 75 times [2020-04-17 22:58:20,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:20,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145624706] [2020-04-17 22:58:20,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:20,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145624706] [2020-04-17 22:58:20,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531432617] [2020-04-17 22:58:20,464 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:20,503 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:20,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:20,504 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:20,504 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:25,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:25,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:25,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229196694] [2020-04-17 22:58:25,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:25,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:25,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:25,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:25,461 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-04-17 22:58:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:25,741 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-04-17 22:58:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:25,741 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:25,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:25,743 INFO L225 Difference]: With dead ends: 198 [2020-04-17 22:58:25,743 INFO L226 Difference]: Without dead ends: 196 [2020-04-17 22:58:25,744 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:25,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-04-17 22:58:25,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-04-17 22:58:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-04-17 22:58:25,748 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-04-17 22:58:25,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:25,748 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-04-17 22:58:25,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:25,748 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-04-17 22:58:25,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:25,749 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:25,749 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:25,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:25,953 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:25,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:25,953 INFO L82 PathProgramCache]: Analyzing trace with hash 668767842, now seen corresponding path program 76 times [2020-04-17 22:58:25,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:25,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247172585] [2020-04-17 22:58:25,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:26,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247172585] [2020-04-17 22:58:26,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088158905] [2020-04-17 22:58:26,020 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:26,067 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:26,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:26,068 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:26,068 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:32,258 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 20 [2020-04-17 22:58:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:32,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:32,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:58:32,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207953363] [2020-04-17 22:58:32,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:58:32,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:32,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:58:32,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=173, Unknown=2, NotChecked=0, Total=240 [2020-04-17 22:58:32,260 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 16 states. [2020-04-17 22:58:34,964 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 22:58:41,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:41,740 INFO L93 Difference]: Finished difference Result 217 states and 509 transitions. [2020-04-17 22:58:41,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:58:41,740 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 22:58:41,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:41,741 INFO L225 Difference]: With dead ends: 217 [2020-04-17 22:58:41,741 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 22:58:41,742 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=215, Invalid=484, Unknown=3, NotChecked=0, Total=702 [2020-04-17 22:58:41,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 22:58:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-04-17 22:58:41,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-04-17 22:58:41,745 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-04-17 22:58:41,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:41,746 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-04-17 22:58:41,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:58:41,746 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-04-17 22:58:41,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:41,746 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:41,746 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:41,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:41,947 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:41,948 INFO L82 PathProgramCache]: Analyzing trace with hash 668789201, now seen corresponding path program 77 times [2020-04-17 22:58:41,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:41,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653383477] [2020-04-17 22:58:41,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:42,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653383477] [2020-04-17 22:58:42,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471752867] [2020-04-17 22:58:42,017 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:42,061 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:42,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:42,062 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:42,063 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:42,215 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:42,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:42,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:42,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255219171] [2020-04-17 22:58:42,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:42,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:42,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:42,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:42,232 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-04-17 22:58:42,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:42,819 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-04-17 22:58:42,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:58:42,820 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:42,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:42,821 INFO L225 Difference]: With dead ends: 217 [2020-04-17 22:58:42,821 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 22:58:42,822 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-04-17 22:58:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 22:58:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-04-17 22:58:42,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 22:58:42,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-04-17 22:58:42,826 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-04-17 22:58:42,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:42,826 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-04-17 22:58:42,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:42,826 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-04-17 22:58:42,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:42,827 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:42,827 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:43,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:43,030 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:43,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:43,030 INFO L82 PathProgramCache]: Analyzing trace with hash 668790162, now seen corresponding path program 78 times [2020-04-17 22:58:43,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:43,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578708734] [2020-04-17 22:58:43,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:43,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578708734] [2020-04-17 22:58:43,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183675069] [2020-04-17 22:58:43,103 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:43,142 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:43,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:43,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:43,143 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:43,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:43,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:43,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:43,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127027448] [2020-04-17 22:58:43,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:43,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:43,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:43,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:43,268 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-04-17 22:58:43,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:43,814 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-04-17 22:58:43,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:58:43,814 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:43,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:43,815 INFO L225 Difference]: With dead ends: 236 [2020-04-17 22:58:43,816 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 22:58:43,816 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:58:43,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 22:58:43,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-04-17 22:58:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:58:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-04-17 22:58:43,820 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-04-17 22:58:43,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:43,821 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-04-17 22:58:43,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-04-17 22:58:43,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:43,821 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:43,822 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:44,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:44,025 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:44,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:44,026 INFO L82 PathProgramCache]: Analyzing trace with hash 668818992, now seen corresponding path program 79 times [2020-04-17 22:58:44,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:44,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867160647] [2020-04-17 22:58:44,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:44,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867160647] [2020-04-17 22:58:44,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609574018] [2020-04-17 22:58:44,109 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:44,161 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:44,162 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:44,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:44,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:44,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:44,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625485164] [2020-04-17 22:58:44,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:44,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:44,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:44,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:44,323 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 15 states. [2020-04-17 22:58:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:44,760 INFO L93 Difference]: Finished difference Result 219 states and 522 transitions. [2020-04-17 22:58:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:58:44,761 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:44,762 INFO L225 Difference]: With dead ends: 219 [2020-04-17 22:58:44,762 INFO L226 Difference]: Without dead ends: 214 [2020-04-17 22:58:44,763 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2020-04-17 22:58:44,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-04-17 22:58:44,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 140. [2020-04-17 22:58:44,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:58:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-04-17 22:58:44,766 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-04-17 22:58:44,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:44,766 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-04-17 22:58:44,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:44,766 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-04-17 22:58:44,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:44,767 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:44,767 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:44,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:44,968 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:44,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:44,968 INFO L82 PathProgramCache]: Analyzing trace with hash 675254592, now seen corresponding path program 80 times [2020-04-17 22:58:44,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:44,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496179991] [2020-04-17 22:58:44,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:45,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496179991] [2020-04-17 22:58:45,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411839344] [2020-04-17 22:58:45,027 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:45,068 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:45,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:45,069 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:45,069 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:45,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:45,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:45,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502250648] [2020-04-17 22:58:45,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:45,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:45,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:45,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:45,177 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-04-17 22:58:45,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:45,405 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-04-17 22:58:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:45,406 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:45,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:45,407 INFO L225 Difference]: With dead ends: 197 [2020-04-17 22:58:45,407 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 22:58:45,407 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:45,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 22:58:45,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-04-17 22:58:45,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-04-17 22:58:45,412 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-04-17 22:58:45,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:45,412 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-04-17 22:58:45,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:45,412 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-04-17 22:58:45,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:45,413 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:45,413 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:45,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:45,616 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:45,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:45,616 INFO L82 PathProgramCache]: Analyzing trace with hash 675255553, now seen corresponding path program 81 times [2020-04-17 22:58:45,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:45,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226109851] [2020-04-17 22:58:45,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:45,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226109851] [2020-04-17 22:58:45,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559599101] [2020-04-17 22:58:45,688 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:45,735 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:45,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:45,736 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:45,737 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:45,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:45,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:45,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410003812] [2020-04-17 22:58:45,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:45,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:45,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:45,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:45,847 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-04-17 22:58:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:46,083 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-04-17 22:58:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:46,084 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:46,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:46,085 INFO L225 Difference]: With dead ends: 202 [2020-04-17 22:58:46,085 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 22:58:46,085 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 22:58:46,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-04-17 22:58:46,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-04-17 22:58:46,088 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-04-17 22:58:46,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:46,089 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-04-17 22:58:46,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-04-17 22:58:46,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:46,089 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:46,089 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:46,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:46,290 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:46,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:46,291 INFO L82 PathProgramCache]: Analyzing trace with hash 675284383, now seen corresponding path program 82 times [2020-04-17 22:58:46,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:46,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536894079] [2020-04-17 22:58:46,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:46,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536894079] [2020-04-17 22:58:46,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029898344] [2020-04-17 22:58:46,352 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:46,392 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:46,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:46,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:46,393 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:46,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:46,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:46,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230312063] [2020-04-17 22:58:46,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:46,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:46,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:46,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:46,894 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-04-17 22:58:47,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:47,143 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-04-17 22:58:47,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:58:47,143 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:47,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:47,144 INFO L225 Difference]: With dead ends: 197 [2020-04-17 22:58:47,144 INFO L226 Difference]: Without dead ends: 195 [2020-04-17 22:58:47,145 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:47,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-04-17 22:58:47,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-04-17 22:58:47,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-04-17 22:58:47,148 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-04-17 22:58:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:47,148 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-04-17 22:58:47,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-04-17 22:58:47,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:47,148 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:47,149 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:47,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:47,349 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:47,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:47,350 INFO L82 PathProgramCache]: Analyzing trace with hash 695810382, now seen corresponding path program 83 times [2020-04-17 22:58:47,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:47,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246107257] [2020-04-17 22:58:47,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:47,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246107257] [2020-04-17 22:58:47,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384924649] [2020-04-17 22:58:47,410 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:47,452 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:47,452 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:47,453 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:47,453 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:47,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:47,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:47,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497611580] [2020-04-17 22:58:47,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:47,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:47,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:47,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:47,546 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-04-17 22:58:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:47,899 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-04-17 22:58:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 22:58:47,900 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:47,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:47,900 INFO L225 Difference]: With dead ends: 214 [2020-04-17 22:58:47,901 INFO L226 Difference]: Without dead ends: 212 [2020-04-17 22:58:47,901 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:58:47,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-04-17 22:58:47,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-04-17 22:58:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:58:47,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-04-17 22:58:47,905 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-04-17 22:58:47,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:47,906 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-04-17 22:58:47,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:47,906 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-04-17 22:58:47,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:47,906 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:47,906 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:48,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:48,110 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:48,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:48,110 INFO L82 PathProgramCache]: Analyzing trace with hash 695811343, now seen corresponding path program 84 times [2020-04-17 22:58:48,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:48,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911955926] [2020-04-17 22:58:48,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:48,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911955926] [2020-04-17 22:58:48,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610771496] [2020-04-17 22:58:48,184 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:48,231 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:48,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:48,232 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:48,233 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:48,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:48,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:48,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338729011] [2020-04-17 22:58:48,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:48,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:48,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:48,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:48,325 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-04-17 22:58:48,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:48,665 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-04-17 22:58:48,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:58:48,665 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:48,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:48,666 INFO L225 Difference]: With dead ends: 217 [2020-04-17 22:58:48,666 INFO L226 Difference]: Without dead ends: 215 [2020-04-17 22:58:48,667 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:58:48,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-04-17 22:58:48,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-04-17 22:58:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 22:58:48,670 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 22:58:48,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:48,670 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 22:58:48,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:48,670 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 22:58:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:48,670 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:48,671 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:48,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:48,871 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:48,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:48,872 INFO L82 PathProgramCache]: Analyzing trace with hash 696473472, now seen corresponding path program 85 times [2020-04-17 22:58:48,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:48,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210126544] [2020-04-17 22:58:48,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:48,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210126544] [2020-04-17 22:58:48,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509266323] [2020-04-17 22:58:48,931 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:48,971 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:48,972 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:49,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:49,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:49,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940960427] [2020-04-17 22:58:49,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:49,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:49,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:49,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:49,065 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 22:58:49,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:49,418 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-04-17 22:58:49,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 22:58:49,418 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:49,419 INFO L225 Difference]: With dead ends: 211 [2020-04-17 22:58:49,419 INFO L226 Difference]: Without dead ends: 209 [2020-04-17 22:58:49,420 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:58:49,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-04-17 22:58:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-04-17 22:58:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 22:58:49,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 22:58:49,424 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 22:58:49,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:49,424 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 22:58:49,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:49,425 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 22:58:49,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:49,425 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:49,425 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:49,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:49,629 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:49,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:49,629 INFO L82 PathProgramCache]: Analyzing trace with hash 696494831, now seen corresponding path program 86 times [2020-04-17 22:58:49,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:49,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081116038] [2020-04-17 22:58:49,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:49,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081116038] [2020-04-17 22:58:49,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228190941] [2020-04-17 22:58:49,693 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:49,735 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:49,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:49,735 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:49,736 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:49,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:49,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:49,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:49,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086661276] [2020-04-17 22:58:49,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:49,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:49,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:49,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:49,811 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 22:58:50,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:50,206 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-04-17 22:58:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:58:50,206 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:50,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:50,207 INFO L225 Difference]: With dead ends: 211 [2020-04-17 22:58:50,207 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 22:58:50,207 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-04-17 22:58:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 22:58:50,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-04-17 22:58:50,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 22:58:50,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 22:58:50,211 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 22:58:50,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:50,211 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 22:58:50,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:50,211 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 22:58:50,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:50,212 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:50,212 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:50,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:50,413 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:50,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:50,413 INFO L82 PathProgramCache]: Analyzing trace with hash 696495792, now seen corresponding path program 87 times [2020-04-17 22:58:50,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:50,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819990884] [2020-04-17 22:58:50,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:50,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819990884] [2020-04-17 22:58:50,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288360282] [2020-04-17 22:58:50,483 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:50,525 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:58:50,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:50,526 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:50,526 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:50,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:50,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:50,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:50,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716260359] [2020-04-17 22:58:50,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:50,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:50,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:50,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:50,623 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 22:58:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:51,107 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-04-17 22:58:51,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 22:58:51,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:51,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:51,108 INFO L225 Difference]: With dead ends: 227 [2020-04-17 22:58:51,108 INFO L226 Difference]: Without dead ends: 222 [2020-04-17 22:58:51,109 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 22:58:51,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-04-17 22:58:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-04-17 22:58:51,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-04-17 22:58:51,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-04-17 22:58:51,112 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-04-17 22:58:51,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:51,112 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-04-17 22:58:51,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:51,113 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-04-17 22:58:51,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:51,113 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:51,113 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:51,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:51,315 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:51,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:51,315 INFO L82 PathProgramCache]: Analyzing trace with hash 696503263, now seen corresponding path program 88 times [2020-04-17 22:58:51,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:51,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807401277] [2020-04-17 22:58:51,316 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:51,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807401277] [2020-04-17 22:58:51,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944730070] [2020-04-17 22:58:51,372 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:51,411 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:58:51,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:51,411 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:51,412 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:51,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:51,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:51,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666461881] [2020-04-17 22:58:51,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:51,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:51,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:51,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:51,521 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-04-17 22:58:51,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:51,907 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-04-17 22:58:51,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 22:58:51,907 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:51,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:51,908 INFO L225 Difference]: With dead ends: 221 [2020-04-17 22:58:51,908 INFO L226 Difference]: Without dead ends: 219 [2020-04-17 22:58:51,909 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:58:51,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-04-17 22:58:51,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-04-17 22:58:51,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-04-17 22:58:51,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-04-17 22:58:51,913 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-04-17 22:58:51,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:51,913 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-04-17 22:58:51,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:51,913 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-04-17 22:58:51,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:51,913 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:51,913 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:52,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:52,114 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:52,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:52,115 INFO L82 PathProgramCache]: Analyzing trace with hash 696524622, now seen corresponding path program 89 times [2020-04-17 22:58:52,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:52,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676546363] [2020-04-17 22:58:52,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:52,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676546363] [2020-04-17 22:58:52,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072448428] [2020-04-17 22:58:52,181 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:52,222 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:58:52,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:52,223 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:52,224 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:52,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:52,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:52,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:52,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415165346] [2020-04-17 22:58:52,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:52,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:52,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:52,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:52,298 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-04-17 22:58:52,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:52,764 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-04-17 22:58:52,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:58:52,765 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:52,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:52,766 INFO L225 Difference]: With dead ends: 240 [2020-04-17 22:58:52,766 INFO L226 Difference]: Without dead ends: 232 [2020-04-17 22:58:52,766 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:58:52,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-04-17 22:58:52,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-04-17 22:58:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-04-17 22:58:52,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-04-17 22:58:52,770 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-04-17 22:58:52,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:52,770 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-04-17 22:58:52,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:52,770 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-04-17 22:58:52,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:52,770 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:52,771 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:52,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:52,971 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:52,972 INFO L82 PathProgramCache]: Analyzing trace with hash 696525583, now seen corresponding path program 90 times [2020-04-17 22:58:52,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:52,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393776557] [2020-04-17 22:58:52,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:53,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:53,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393776557] [2020-04-17 22:58:53,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716735925] [2020-04-17 22:58:53,035 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:53,077 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:58:53,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:53,078 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:53,078 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:53,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:53,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:53,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:53,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:53,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079708104] [2020-04-17 22:58:53,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:53,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:53,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:53,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:53,152 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-04-17 22:58:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:53,708 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-04-17 22:58:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:58:53,709 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:53,709 INFO L225 Difference]: With dead ends: 238 [2020-04-17 22:58:53,710 INFO L226 Difference]: Without dead ends: 230 [2020-04-17 22:58:53,710 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:58:53,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-04-17 22:58:53,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-04-17 22:58:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 22:58:53,713 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 22:58:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:53,713 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 22:58:53,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 22:58:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:53,714 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:53,714 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:53,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:53,918 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:53,919 INFO L82 PathProgramCache]: Analyzing trace with hash 696733903, now seen corresponding path program 91 times [2020-04-17 22:58:53,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:53,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542351610] [2020-04-17 22:58:53,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:53,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542351610] [2020-04-17 22:58:53,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201310063] [2020-04-17 22:58:53,979 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:54,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:54,019 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:54,020 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:54,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:54,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:54,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:54,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702132526] [2020-04-17 22:58:54,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:54,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:54,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:54,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:54,539 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 22:58:54,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:54,765 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-04-17 22:58:54,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:58:54,766 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:54,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:54,767 INFO L225 Difference]: With dead ends: 195 [2020-04-17 22:58:54,767 INFO L226 Difference]: Without dead ends: 193 [2020-04-17 22:58:54,767 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:58:54,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-04-17 22:58:54,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-04-17 22:58:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:58:54,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-04-17 22:58:54,770 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-04-17 22:58:54,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:54,771 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-04-17 22:58:54,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:54,771 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-04-17 22:58:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:54,771 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:54,772 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:54,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:54,975 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:54,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:54,975 INFO L82 PathProgramCache]: Analyzing trace with hash 697396993, now seen corresponding path program 92 times [2020-04-17 22:58:54,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:54,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916606609] [2020-04-17 22:58:54,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:55,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916606609] [2020-04-17 22:58:55,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931815121] [2020-04-17 22:58:55,042 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:55,080 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:58:55,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:55,081 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:58:55,082 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:55,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:55,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:58:55,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346355640] [2020-04-17 22:58:55,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:58:55,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:55,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:58:55,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:58:55,191 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-04-17 22:58:55,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:58:55,576 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-04-17 22:58:55,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:58:55,577 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:58:55,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:58:55,578 INFO L225 Difference]: With dead ends: 206 [2020-04-17 22:58:55,578 INFO L226 Difference]: Without dead ends: 204 [2020-04-17 22:58:55,578 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:58:55,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-04-17 22:58:55,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-04-17 22:58:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-04-17 22:58:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-04-17 22:58:55,582 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-04-17 22:58:55,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:58:55,582 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-04-17 22:58:55,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:58:55,582 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-04-17 22:58:55,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:58:55,583 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:58:55,583 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:58:55,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:55,784 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:58:55,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:58:55,784 INFO L82 PathProgramCache]: Analyzing trace with hash 697419313, now seen corresponding path program 93 times [2020-04-17 22:58:55,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:58:55,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220944238] [2020-04-17 22:58:55,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:58:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:58:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:55,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220944238] [2020-04-17 22:58:55,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956481045] [2020-04-17 22:58:55,850 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:58:55,896 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:58:55,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:58:55,897 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 22:58:55,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:58:55,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:58:56,701 WARN L192 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2020-04-17 22:58:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:58:56,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:58:56,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:58:56,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326797307] [2020-04-17 22:58:56,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:58:56,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:58:56,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:58:56,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=173, Unknown=1, NotChecked=0, Total=240 [2020-04-17 22:58:56,703 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-04-17 22:58:57,670 WARN L192 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2020-04-17 22:59:08,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:08,410 INFO L93 Difference]: Finished difference Result 238 states and 564 transitions. [2020-04-17 22:59:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 22:59:08,413 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 22:59:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:08,413 INFO L225 Difference]: With dead ends: 238 [2020-04-17 22:59:08,414 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 22:59:08,414 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=297, Invalid=755, Unknown=4, NotChecked=0, Total=1056 [2020-04-17 22:59:08,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 22:59:08,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 139. [2020-04-17 22:59:08,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:59:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-04-17 22:59:08,417 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-04-17 22:59:08,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:08,417 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-04-17 22:59:08,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:59:08,418 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-04-17 22:59:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:08,418 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:08,418 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:08,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:08,622 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:08,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:08,622 INFO L82 PathProgramCache]: Analyzing trace with hash 896899632, now seen corresponding path program 94 times [2020-04-17 22:59:08,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:08,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879428880] [2020-04-17 22:59:08,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:08,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879428880] [2020-04-17 22:59:08,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138006827] [2020-04-17 22:59:08,697 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:08,740 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:08,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:08,741 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:08,742 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:08,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:08,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:08,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138869905] [2020-04-17 22:59:08,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:08,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:08,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:08,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:08,842 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-04-17 22:59:09,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:09,030 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 22:59:09,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:59:09,030 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:09,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:09,031 INFO L225 Difference]: With dead ends: 194 [2020-04-17 22:59:09,031 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 22:59:09,032 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:59:09,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 22:59:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-04-17 22:59:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:59:09,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-04-17 22:59:09,035 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-04-17 22:59:09,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:09,035 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-04-17 22:59:09,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:09,035 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-04-17 22:59:09,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:09,036 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:09,036 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:09,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:09,236 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:09,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:09,237 INFO L82 PathProgramCache]: Analyzing trace with hash 896900593, now seen corresponding path program 95 times [2020-04-17 22:59:09,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:09,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316089296] [2020-04-17 22:59:09,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:09,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316089296] [2020-04-17 22:59:09,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529539426] [2020-04-17 22:59:09,315 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:09,357 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:09,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:09,358 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:09,359 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:09,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:09,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:09,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015969130] [2020-04-17 22:59:09,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:09,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:09,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:09,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:09,472 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-04-17 22:59:09,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:09,730 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-04-17 22:59:09,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:59:09,730 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:09,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:09,731 INFO L225 Difference]: With dead ends: 205 [2020-04-17 22:59:09,731 INFO L226 Difference]: Without dead ends: 203 [2020-04-17 22:59:09,732 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:59:09,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-04-17 22:59:09,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-04-17 22:59:09,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:59:09,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-04-17 22:59:09,735 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-04-17 22:59:09,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:09,735 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-04-17 22:59:09,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:09,735 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-04-17 22:59:09,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:09,736 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:09,736 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:09,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:09,937 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:09,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:09,937 INFO L82 PathProgramCache]: Analyzing trace with hash 896929423, now seen corresponding path program 96 times [2020-04-17 22:59:09,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:09,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436569812] [2020-04-17 22:59:09,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:10,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436569812] [2020-04-17 22:59:10,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626889253] [2020-04-17 22:59:10,012 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:10,069 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:59:10,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:10,070 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:10,070 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:10,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:10,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:10,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704876957] [2020-04-17 22:59:10,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:10,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:10,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:10,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:10,171 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-04-17 22:59:10,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:10,395 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 22:59:10,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:59:10,395 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:10,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:10,396 INFO L225 Difference]: With dead ends: 201 [2020-04-17 22:59:10,396 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 22:59:10,397 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:59:10,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 22:59:10,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-04-17 22:59:10,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 22:59:10,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-04-17 22:59:10,399 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-04-17 22:59:10,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:10,400 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-04-17 22:59:10,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:10,400 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-04-17 22:59:10,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:10,400 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:10,400 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:10,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:10,601 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:10,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:10,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1534129122, now seen corresponding path program 97 times [2020-04-17 22:59:10,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:10,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803056808] [2020-04-17 22:59:10,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:10,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803056808] [2020-04-17 22:59:10,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886584707] [2020-04-17 22:59:10,661 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:10,700 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:10,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:10,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:10,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:10,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910388009] [2020-04-17 22:59:10,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:10,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:10,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:10,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:10,822 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-04-17 22:59:11,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:11,026 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-04-17 22:59:11,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:59:11,026 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:11,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:11,027 INFO L225 Difference]: With dead ends: 194 [2020-04-17 22:59:11,027 INFO L226 Difference]: Without dead ends: 192 [2020-04-17 22:59:11,028 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:59:11,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-04-17 22:59:11,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-04-17 22:59:11,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:59:11,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-04-17 22:59:11,030 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-04-17 22:59:11,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:11,031 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-04-17 22:59:11,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:11,031 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-04-17 22:59:11,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:11,031 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:11,031 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:11,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:11,232 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:11,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1534130083, now seen corresponding path program 98 times [2020-04-17 22:59:11,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:11,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97013159] [2020-04-17 22:59:11,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:11,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97013159] [2020-04-17 22:59:11,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631055448] [2020-04-17 22:59:11,297 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:11,339 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:11,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:11,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:11,340 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:11,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:11,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:11,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123068054] [2020-04-17 22:59:11,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:11,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:11,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:11,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:11,836 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-04-17 22:59:12,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:12,134 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-04-17 22:59:12,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 22:59:12,135 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:12,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:12,136 INFO L225 Difference]: With dead ends: 209 [2020-04-17 22:59:12,136 INFO L226 Difference]: Without dead ends: 207 [2020-04-17 22:59:12,136 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:12,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-04-17 22:59:12,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-04-17 22:59:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-04-17 22:59:12,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-04-17 22:59:12,139 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-04-17 22:59:12,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:12,139 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-04-17 22:59:12,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:12,139 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-04-17 22:59:12,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:12,139 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:12,140 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:12,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:12,340 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:12,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:12,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1534158913, now seen corresponding path program 99 times [2020-04-17 22:59:12,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:12,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266938109] [2020-04-17 22:59:12,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:12,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266938109] [2020-04-17 22:59:12,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864289820] [2020-04-17 22:59:12,407 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:12,449 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:59:12,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:12,450 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:12,451 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:12,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:12,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:12,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305883839] [2020-04-17 22:59:12,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:12,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:12,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:12,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:12,543 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-04-17 22:59:12,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:12,820 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-04-17 22:59:12,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 22:59:12,821 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:12,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:12,822 INFO L225 Difference]: With dead ends: 202 [2020-04-17 22:59:12,822 INFO L226 Difference]: Without dead ends: 200 [2020-04-17 22:59:12,822 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:59:12,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-04-17 22:59:12,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-04-17 22:59:12,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:59:12,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-04-17 22:59:12,826 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-04-17 22:59:12,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:12,826 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-04-17 22:59:12,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:12,826 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-04-17 22:59:12,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:12,826 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:12,826 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:13,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:13,027 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:13,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1554684912, now seen corresponding path program 100 times [2020-04-17 22:59:13,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:13,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20464887] [2020-04-17 22:59:13,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:13,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:13,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20464887] [2020-04-17 22:59:13,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584144956] [2020-04-17 22:59:13,096 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:13,138 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:13,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:13,139 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:13,140 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:13,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:13,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:13,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352870801] [2020-04-17 22:59:13,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:13,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:13,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:13,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:13,241 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-04-17 22:59:13,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:13,503 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-04-17 22:59:13,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:59:13,503 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:13,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:13,504 INFO L225 Difference]: With dead ends: 201 [2020-04-17 22:59:13,504 INFO L226 Difference]: Without dead ends: 199 [2020-04-17 22:59:13,505 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:59:13,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-04-17 22:59:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-04-17 22:59:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-04-17 22:59:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-04-17 22:59:13,508 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-04-17 22:59:13,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:13,508 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-04-17 22:59:13,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-04-17 22:59:13,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:13,509 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:13,509 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:13,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:13,712 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:13,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:13,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1554685873, now seen corresponding path program 101 times [2020-04-17 22:59:13,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:13,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924205721] [2020-04-17 22:59:13,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:13,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924205721] [2020-04-17 22:59:13,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220740697] [2020-04-17 22:59:13,776 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:13,818 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:13,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:13,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:13,819 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:14,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:14,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:14,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471720204] [2020-04-17 22:59:14,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:14,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:14,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:14,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:14,316 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-04-17 22:59:14,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:14,699 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-04-17 22:59:14,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 22:59:14,699 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:14,700 INFO L225 Difference]: With dead ends: 215 [2020-04-17 22:59:14,700 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 22:59:14,700 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 22:59:14,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 22:59:14,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-04-17 22:59:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:59:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 22:59:14,704 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 22:59:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:14,705 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 22:59:14,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 22:59:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:14,705 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:14,706 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:14,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:14,909 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:14,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1555348002, now seen corresponding path program 102 times [2020-04-17 22:59:14,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:14,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565810771] [2020-04-17 22:59:14,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:14,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565810771] [2020-04-17 22:59:14,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527180129] [2020-04-17 22:59:14,973 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:15,015 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:59:15,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:15,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:15,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:15,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:15,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:15,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071857343] [2020-04-17 22:59:15,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:15,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:15,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:15,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:15,119 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 22:59:15,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:15,433 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-04-17 22:59:15,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 22:59:15,433 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:15,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:15,434 INFO L225 Difference]: With dead ends: 196 [2020-04-17 22:59:15,434 INFO L226 Difference]: Without dead ends: 194 [2020-04-17 22:59:15,435 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:59:15,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-04-17 22:59:15,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-04-17 22:59:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:59:15,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 22:59:15,438 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 22:59:15,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:15,438 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 22:59:15,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:15,438 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 22:59:15,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:15,439 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:15,439 INFO L425 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:15,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:15,641 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:15,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1555369361, now seen corresponding path program 103 times [2020-04-17 22:59:15,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:15,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945409494] [2020-04-17 22:59:15,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:15,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945409494] [2020-04-17 22:59:15,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900578625] [2020-04-17 22:59:15,717 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:15,756 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:15,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:15,825 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:15,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:15,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:15,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396395249] [2020-04-17 22:59:15,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:15,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:15,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:15,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:15,835 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 22:59:16,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:16,093 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-04-17 22:59:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:59:16,094 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:16,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:16,094 INFO L225 Difference]: With dead ends: 191 [2020-04-17 22:59:16,095 INFO L226 Difference]: Without dead ends: 186 [2020-04-17 22:59:16,095 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:59:16,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-04-17 22:59:16,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-04-17 22:59:16,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:59:16,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 22:59:16,099 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 22:59:16,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:16,099 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 22:59:16,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:16,100 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 22:59:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:16,100 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:16,100 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:16,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:16,303 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:16,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:16,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1555370322, now seen corresponding path program 104 times [2020-04-17 22:59:16,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:16,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836123286] [2020-04-17 22:59:16,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:16,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836123286] [2020-04-17 22:59:16,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158399746] [2020-04-17 22:59:16,366 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:16,406 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:16,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:16,407 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:16,407 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:16,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:16,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:16,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:16,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571290150] [2020-04-17 22:59:16,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:16,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:16,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:16,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:16,505 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 22:59:16,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:16,966 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-04-17 22:59:16,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:59:16,967 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:16,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:16,967 INFO L225 Difference]: With dead ends: 232 [2020-04-17 22:59:16,968 INFO L226 Difference]: Without dead ends: 227 [2020-04-17 22:59:16,968 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:59:16,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-04-17 22:59:16,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-04-17 22:59:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-04-17 22:59:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-04-17 22:59:16,971 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-04-17 22:59:16,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:16,972 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-04-17 22:59:16,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:16,972 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-04-17 22:59:16,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:16,972 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:16,972 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:17,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:17,173 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:17,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:17,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1555377793, now seen corresponding path program 105 times [2020-04-17 22:59:17,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:17,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412323830] [2020-04-17 22:59:17,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:17,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412323830] [2020-04-17 22:59:17,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552566897] [2020-04-17 22:59:17,236 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:17,278 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:59:17,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:17,278 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:17,279 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:17,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:17,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:17,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205998205] [2020-04-17 22:59:17,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:17,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:17,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:17,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:17,391 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-04-17 22:59:17,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:17,844 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-04-17 22:59:17,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 22:59:17,845 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:17,846 INFO L225 Difference]: With dead ends: 222 [2020-04-17 22:59:17,846 INFO L226 Difference]: Without dead ends: 220 [2020-04-17 22:59:17,846 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-04-17 22:59:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-04-17 22:59:17,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-04-17 22:59:17,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-04-17 22:59:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-04-17 22:59:17,850 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-04-17 22:59:17,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:17,850 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-04-17 22:59:17,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-04-17 22:59:17,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:17,851 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:17,851 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:18,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:18,052 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:18,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1555399152, now seen corresponding path program 106 times [2020-04-17 22:59:18,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:18,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455926118] [2020-04-17 22:59:18,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:18,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455926118] [2020-04-17 22:59:18,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273196107] [2020-04-17 22:59:18,115 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:18,159 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:18,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:18,160 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:18,160 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:18,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:18,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:18,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:18,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135283647] [2020-04-17 22:59:18,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:18,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:18,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:18,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:18,281 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-04-17 22:59:18,975 WARN L192 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-04-17 22:59:19,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:19,762 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-04-17 22:59:19,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:59:19,763 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:19,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:19,763 INFO L225 Difference]: With dead ends: 254 [2020-04-17 22:59:19,764 INFO L226 Difference]: Without dead ends: 246 [2020-04-17 22:59:19,764 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=345, Invalid=776, Unknown=1, NotChecked=0, Total=1122 [2020-04-17 22:59:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-04-17 22:59:19,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-04-17 22:59:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-04-17 22:59:19,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-04-17 22:59:19,767 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-04-17 22:59:19,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:19,767 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-04-17 22:59:19,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:19,767 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-04-17 22:59:19,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:19,767 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:19,768 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:19,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:19,968 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:19,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1555400113, now seen corresponding path program 107 times [2020-04-17 22:59:19,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:19,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998933139] [2020-04-17 22:59:19,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:20,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998933139] [2020-04-17 22:59:20,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792666092] [2020-04-17 22:59:20,029 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:20,069 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:20,069 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:20,070 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:20,070 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:20,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:20,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:20,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-04-17 22:59:20,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248441405] [2020-04-17 22:59:20,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 22:59:20,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:20,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 22:59:20,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=172, Unknown=1, NotChecked=0, Total=240 [2020-04-17 22:59:20,545 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 16 states. [2020-04-17 22:59:21,913 WARN L192 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-04-17 22:59:28,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:28,854 INFO L93 Difference]: Finished difference Result 259 states and 605 transitions. [2020-04-17 22:59:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 22:59:28,855 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-04-17 22:59:28,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:28,856 INFO L225 Difference]: With dead ends: 259 [2020-04-17 22:59:28,856 INFO L226 Difference]: Without dead ends: 249 [2020-04-17 22:59:28,856 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=434, Invalid=1044, Unknown=4, NotChecked=0, Total=1482 [2020-04-17 22:59:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-04-17 22:59:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 139. [2020-04-17 22:59:28,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-04-17 22:59:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-04-17 22:59:28,861 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-04-17 22:59:28,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:28,861 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-04-17 22:59:28,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 22:59:28,861 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-04-17 22:59:28,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:28,862 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:28,862 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:29,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:29,065 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:29,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:29,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1555608433, now seen corresponding path program 108 times [2020-04-17 22:59:29,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:29,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005075677] [2020-04-17 22:59:29,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:29,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:29,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005075677] [2020-04-17 22:59:29,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654825761] [2020-04-17 22:59:29,127 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:29,169 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:59:29,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:29,169 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:29,170 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:29,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:29,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:29,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:29,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105147670] [2020-04-17 22:59:29,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:29,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:29,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:29,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:29,271 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-04-17 22:59:29,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:29,585 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-04-17 22:59:29,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 22:59:29,585 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:29,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:29,586 INFO L225 Difference]: With dead ends: 208 [2020-04-17 22:59:29,586 INFO L226 Difference]: Without dead ends: 206 [2020-04-17 22:59:29,587 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-04-17 22:59:29,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-04-17 22:59:29,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-04-17 22:59:29,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-04-17 22:59:29,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-04-17 22:59:29,589 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-04-17 22:59:29,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:29,590 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-04-17 22:59:29,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:29,590 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-04-17 22:59:29,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:29,590 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:29,590 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:29,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:29,791 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:29,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:29,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1556271523, now seen corresponding path program 109 times [2020-04-17 22:59:29,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:29,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521422132] [2020-04-17 22:59:29,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:29,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521422132] [2020-04-17 22:59:29,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556464384] [2020-04-17 22:59:29,864 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:29,905 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:29,906 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:29,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:29,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:29,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424042706] [2020-04-17 22:59:29,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:29,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:29,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:29,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:29,994 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-04-17 22:59:30,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:30,421 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-04-17 22:59:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 22:59:30,422 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:30,423 INFO L225 Difference]: With dead ends: 215 [2020-04-17 22:59:30,423 INFO L226 Difference]: Without dead ends: 213 [2020-04-17 22:59:30,423 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-04-17 22:59:30,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-04-17 22:59:30,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-04-17 22:59:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 22:59:30,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-04-17 22:59:30,427 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-04-17 22:59:30,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:30,427 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-04-17 22:59:30,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:30,427 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-04-17 22:59:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:30,428 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:30,428 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:30,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:30,629 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:30,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:30,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1556292882, now seen corresponding path program 110 times [2020-04-17 22:59:30,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:30,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678544745] [2020-04-17 22:59:30,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:30,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678544745] [2020-04-17 22:59:30,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576443612] [2020-04-17 22:59:30,693 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:30,733 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:30,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:30,734 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:30,735 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:30,809 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:30,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:30,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:30,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039036977] [2020-04-17 22:59:30,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:30,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:30,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:30,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:30,817 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-04-17 22:59:31,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:31,296 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-04-17 22:59:31,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:59:31,297 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:31,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:31,298 INFO L225 Difference]: With dead ends: 236 [2020-04-17 22:59:31,298 INFO L226 Difference]: Without dead ends: 228 [2020-04-17 22:59:31,298 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:59:31,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-04-17 22:59:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-04-17 22:59:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-04-17 22:59:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-04-17 22:59:31,302 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-04-17 22:59:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:31,302 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-04-17 22:59:31,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-04-17 22:59:31,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:31,302 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:31,302 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:31,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:31,503 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:31,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:31,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1556293843, now seen corresponding path program 111 times [2020-04-17 22:59:31,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:31,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986782689] [2020-04-17 22:59:31,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:31,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986782689] [2020-04-17 22:59:31,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176687856] [2020-04-17 22:59:31,572 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:31,614 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:59:31,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:31,615 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:31,616 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:31,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:31,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:31,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:31,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435224244] [2020-04-17 22:59:31,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:31,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:31,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:31,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:31,719 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-04-17 22:59:32,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:32,233 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-04-17 22:59:32,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 22:59:32,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:32,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:32,235 INFO L225 Difference]: With dead ends: 241 [2020-04-17 22:59:32,235 INFO L226 Difference]: Without dead ends: 233 [2020-04-17 22:59:32,235 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 22:59:32,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-04-17 22:59:32,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-04-17 22:59:32,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-04-17 22:59:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-04-17 22:59:32,238 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-04-17 22:59:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:32,238 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-04-17 22:59:32,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:32,238 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-04-17 22:59:32,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:32,238 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:32,239 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:32,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:32,442 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:32,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:32,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1556322673, now seen corresponding path program 112 times [2020-04-17 22:59:32,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:32,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093210267] [2020-04-17 22:59:32,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:32,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093210267] [2020-04-17 22:59:32,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828501463] [2020-04-17 22:59:32,508 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:32,551 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:32,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:32,553 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 22:59:32,553 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:32,635 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 22:59:32,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:32,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:32,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-04-17 22:59:32,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299009500] [2020-04-17 22:59:32,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 22:59:32,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:32,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 22:59:32,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-04-17 22:59:32,644 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-04-17 22:59:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:33,155 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-04-17 22:59:33,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 22:59:33,155 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-04-17 22:59:33,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:33,156 INFO L225 Difference]: With dead ends: 232 [2020-04-17 22:59:33,156 INFO L226 Difference]: Without dead ends: 224 [2020-04-17 22:59:33,157 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 22:59:33,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-04-17 22:59:33,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-04-17 22:59:33,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-04-17 22:59:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-04-17 22:59:33,161 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-04-17 22:59:33,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:33,161 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-04-17 22:59:33,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 22:59:33,162 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-04-17 22:59:33,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:33,162 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:33,162 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:33,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:33,366 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:33,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:33,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1725446472, now seen corresponding path program 6 times [2020-04-17 22:59:33,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:33,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20374500] [2020-04-17 22:59:33,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:59:33,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20374500] [2020-04-17 22:59:33,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349820191] [2020-04-17 22:59:33,442 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:33,487 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 22:59:33,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:33,488 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:59:33,488 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:33,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 22:59:33,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 13 [2020-04-17 22:59:33,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420751008] [2020-04-17 22:59:33,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 22:59:33,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:33,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 22:59:33,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:59:33,556 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 8 states. [2020-04-17 22:59:33,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:33,578 INFO L93 Difference]: Finished difference Result 195 states and 513 transitions. [2020-04-17 22:59:33,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:59:33,578 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-04-17 22:59:33,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:33,579 INFO L225 Difference]: With dead ends: 195 [2020-04-17 22:59:33,579 INFO L226 Difference]: Without dead ends: 188 [2020-04-17 22:59:33,579 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:59:33,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-04-17 22:59:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-04-17 22:59:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-04-17 22:59:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 500 transitions. [2020-04-17 22:59:33,583 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 500 transitions. Word has length 13 [2020-04-17 22:59:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:33,583 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 500 transitions. [2020-04-17 22:59:33,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 22:59:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 500 transitions. [2020-04-17 22:59:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 22:59:33,583 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:33,584 INFO L425 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:33,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:33,787 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:33,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:33,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1934382410, now seen corresponding path program 21 times [2020-04-17 22:59:33,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:33,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805355825] [2020-04-17 22:59:33,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-17 22:59:33,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805355825] [2020-04-17 22:59:33,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774111301] [2020-04-17 22:59:33,929 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:33,996 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 22:59:33,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:33,997 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 22:59:33,998 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:34,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-17 22:59:34,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 13 [2020-04-17 22:59:34,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220111681] [2020-04-17 22:59:34,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 22:59:34,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:34,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 22:59:34,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:59:34,074 INFO L87 Difference]: Start difference. First operand 188 states and 500 transitions. Second operand 8 states. [2020-04-17 22:59:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:34,097 INFO L93 Difference]: Finished difference Result 263 states and 678 transitions. [2020-04-17 22:59:34,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 22:59:34,098 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-04-17 22:59:34,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:34,099 INFO L225 Difference]: With dead ends: 263 [2020-04-17 22:59:34,099 INFO L226 Difference]: Without dead ends: 240 [2020-04-17 22:59:34,100 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-04-17 22:59:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-04-17 22:59:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-04-17 22:59:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-04-17 22:59:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 626 transitions. [2020-04-17 22:59:34,106 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 626 transitions. Word has length 13 [2020-04-17 22:59:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:34,107 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 626 transitions. [2020-04-17 22:59:34,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 22:59:34,107 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 626 transitions. [2020-04-17 22:59:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:34,108 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:34,108 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:34,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:34,313 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:34,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:34,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2094057644, now seen corresponding path program 113 times [2020-04-17 22:59:34,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:34,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676175118] [2020-04-17 22:59:34,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:34,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676175118] [2020-04-17 22:59:34,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925656202] [2020-04-17 22:59:34,438 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:34,483 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:34,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:34,484 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:34,485 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:34,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:34,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:34,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089475316] [2020-04-17 22:59:34,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:34,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:34,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:34,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:34,630 INFO L87 Difference]: Start difference. First operand 240 states and 626 transitions. Second operand 17 states. [2020-04-17 22:59:34,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:34,701 INFO L93 Difference]: Finished difference Result 275 states and 692 transitions. [2020-04-17 22:59:34,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:59:34,702 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:34,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:34,703 INFO L225 Difference]: With dead ends: 275 [2020-04-17 22:59:34,703 INFO L226 Difference]: Without dead ends: 273 [2020-04-17 22:59:34,703 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:34,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-04-17 22:59:34,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 250. [2020-04-17 22:59:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-04-17 22:59:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2020-04-17 22:59:34,708 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 14 [2020-04-17 22:59:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:34,708 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2020-04-17 22:59:34,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:34,708 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2020-04-17 22:59:34,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:34,709 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:34,709 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:34,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:34,911 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:34,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:34,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2094058605, now seen corresponding path program 114 times [2020-04-17 22:59:34,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:34,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694762646] [2020-04-17 22:59:34,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:35,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:35,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694762646] [2020-04-17 22:59:35,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45830356] [2020-04-17 22:59:35,005 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:35,047 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:59:35,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:35,047 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:35,048 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:35,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:35,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:35,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35530558] [2020-04-17 22:59:35,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:35,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:35,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:35,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:35,188 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand 17 states. [2020-04-17 22:59:35,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:35,389 INFO L93 Difference]: Finished difference Result 295 states and 735 transitions. [2020-04-17 22:59:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:59:35,389 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:35,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:35,390 INFO L225 Difference]: With dead ends: 295 [2020-04-17 22:59:35,391 INFO L226 Difference]: Without dead ends: 292 [2020-04-17 22:59:35,391 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-04-17 22:59:35,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-04-17 22:59:35,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 251. [2020-04-17 22:59:35,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-04-17 22:59:35,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 657 transitions. [2020-04-17 22:59:35,395 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 657 transitions. Word has length 14 [2020-04-17 22:59:35,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:35,395 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 657 transitions. [2020-04-17 22:59:35,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:35,395 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 657 transitions. [2020-04-17 22:59:35,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:35,396 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:35,396 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:35,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:35,597 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:35,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:35,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2094087435, now seen corresponding path program 115 times [2020-04-17 22:59:35,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:35,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61776789] [2020-04-17 22:59:35,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:35,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61776789] [2020-04-17 22:59:35,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738080735] [2020-04-17 22:59:35,687 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:35,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:35,730 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:35,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:35,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:35,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861523610] [2020-04-17 22:59:35,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:35,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:35,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:35,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:35,903 INFO L87 Difference]: Start difference. First operand 251 states and 657 transitions. Second operand 17 states. [2020-04-17 22:59:37,323 WARN L192 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 22:59:37,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:37,338 INFO L93 Difference]: Finished difference Result 320 states and 793 transitions. [2020-04-17 22:59:37,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 22:59:37,339 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:37,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:37,341 INFO L225 Difference]: With dead ends: 320 [2020-04-17 22:59:37,341 INFO L226 Difference]: Without dead ends: 316 [2020-04-17 22:59:37,342 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=172, Invalid=332, Unknown=2, NotChecked=0, Total=506 [2020-04-17 22:59:37,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-04-17 22:59:37,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 253. [2020-04-17 22:59:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-04-17 22:59:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 663 transitions. [2020-04-17 22:59:37,347 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 663 transitions. Word has length 14 [2020-04-17 22:59:37,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:37,347 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 663 transitions. [2020-04-17 22:59:37,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:37,347 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 663 transitions. [2020-04-17 22:59:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:37,348 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:37,348 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:37,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:37,551 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:37,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:37,551 INFO L82 PathProgramCache]: Analyzing trace with hash 2094981165, now seen corresponding path program 116 times [2020-04-17 22:59:37,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:37,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406845962] [2020-04-17 22:59:37,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:37,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406845962] [2020-04-17 22:59:37,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034180030] [2020-04-17 22:59:37,661 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:37,700 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:37,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:37,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:37,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:38,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:38,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:38,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532254281] [2020-04-17 22:59:38,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:38,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:38,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:38,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:38,398 INFO L87 Difference]: Start difference. First operand 253 states and 663 transitions. Second operand 17 states. [2020-04-17 22:59:38,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:38,698 INFO L93 Difference]: Finished difference Result 316 states and 781 transitions. [2020-04-17 22:59:38,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:59:38,699 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:38,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:38,701 INFO L225 Difference]: With dead ends: 316 [2020-04-17 22:59:38,701 INFO L226 Difference]: Without dead ends: 313 [2020-04-17 22:59:38,701 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:38,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-04-17 22:59:38,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 255. [2020-04-17 22:59:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-04-17 22:59:38,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 669 transitions. [2020-04-17 22:59:38,706 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 669 transitions. Word has length 14 [2020-04-17 22:59:38,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:38,707 INFO L479 AbstractCegarLoop]: Abstraction has 255 states and 669 transitions. [2020-04-17 22:59:38,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 669 transitions. [2020-04-17 22:59:38,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:38,707 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:38,708 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:38,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:38,911 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:38,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:38,911 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982126, now seen corresponding path program 117 times [2020-04-17 22:59:38,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:38,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584564968] [2020-04-17 22:59:38,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:39,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:39,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584564968] [2020-04-17 22:59:39,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538254101] [2020-04-17 22:59:39,033 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:39,095 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 22:59:39,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:39,097 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:39,098 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:39,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:39,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:39,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839692348] [2020-04-17 22:59:39,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:39,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:39,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:39,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:39,383 INFO L87 Difference]: Start difference. First operand 255 states and 669 transitions. Second operand 17 states. [2020-04-17 22:59:39,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:39,771 INFO L93 Difference]: Finished difference Result 342 states and 843 transitions. [2020-04-17 22:59:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:59:39,771 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:39,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:39,772 INFO L225 Difference]: With dead ends: 342 [2020-04-17 22:59:39,772 INFO L226 Difference]: Without dead ends: 337 [2020-04-17 22:59:39,772 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:39,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-04-17 22:59:39,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 256. [2020-04-17 22:59:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-04-17 22:59:39,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-04-17 22:59:39,778 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-04-17 22:59:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:39,778 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-04-17 22:59:39,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:39,778 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-04-17 22:59:39,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:39,779 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:39,779 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:39,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:39,983 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:39,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:39,983 INFO L82 PathProgramCache]: Analyzing trace with hash 2095010956, now seen corresponding path program 118 times [2020-04-17 22:59:39,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:39,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93626449] [2020-04-17 22:59:39,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:40,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93626449] [2020-04-17 22:59:40,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590385316] [2020-04-17 22:59:40,078 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:40,122 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:40,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:40,123 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:40,124 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:40,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:40,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:40,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964999841] [2020-04-17 22:59:40,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:40,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:40,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:40,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:40,278 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-04-17 22:59:40,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:40,550 INFO L93 Difference]: Finished difference Result 331 states and 819 transitions. [2020-04-17 22:59:40,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:59:40,550 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:40,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:40,551 INFO L225 Difference]: With dead ends: 331 [2020-04-17 22:59:40,551 INFO L226 Difference]: Without dead ends: 327 [2020-04-17 22:59:40,552 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-04-17 22:59:40,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 256. [2020-04-17 22:59:40,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-04-17 22:59:40,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 672 transitions. [2020-04-17 22:59:40,559 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 672 transitions. Word has length 14 [2020-04-17 22:59:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:40,559 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 672 transitions. [2020-04-17 22:59:40,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:40,559 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 672 transitions. [2020-04-17 22:59:40,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:40,560 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:40,560 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:40,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:40,763 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:40,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:40,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2122686795, now seen corresponding path program 119 times [2020-04-17 22:59:40,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:40,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845667279] [2020-04-17 22:59:40,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:40,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845667279] [2020-04-17 22:59:40,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600149113] [2020-04-17 22:59:40,856 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:40,897 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:40,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:40,898 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:40,899 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:41,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:41,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:41,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870147574] [2020-04-17 22:59:41,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:41,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:41,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:41,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:41,025 INFO L87 Difference]: Start difference. First operand 256 states and 672 transitions. Second operand 17 states. [2020-04-17 22:59:41,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:41,308 INFO L93 Difference]: Finished difference Result 321 states and 792 transitions. [2020-04-17 22:59:41,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 22:59:41,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:41,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:41,310 INFO L225 Difference]: With dead ends: 321 [2020-04-17 22:59:41,310 INFO L226 Difference]: Without dead ends: 318 [2020-04-17 22:59:41,310 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-04-17 22:59:41,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-04-17 22:59:41,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2020-04-17 22:59:41,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-04-17 22:59:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-04-17 22:59:41,315 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-04-17 22:59:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:41,316 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-04-17 22:59:41,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:41,316 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-04-17 22:59:41,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:41,316 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:41,316 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:41,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:41,517 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:41,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:41,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2122687756, now seen corresponding path program 120 times [2020-04-17 22:59:41,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:41,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685029216] [2020-04-17 22:59:41,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:41,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685029216] [2020-04-17 22:59:41,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286685717] [2020-04-17 22:59:41,608 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:41,647 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 22:59:41,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:41,648 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:41,649 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:42,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:42,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:42,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495318149] [2020-04-17 22:59:42,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:42,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:42,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:42,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:42,130 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-04-17 22:59:42,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:42,430 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-04-17 22:59:42,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:59:42,430 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:42,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:42,431 INFO L225 Difference]: With dead ends: 348 [2020-04-17 22:59:42,431 INFO L226 Difference]: Without dead ends: 343 [2020-04-17 22:59:42,432 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-04-17 22:59:42,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-04-17 22:59:42,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 260. [2020-04-17 22:59:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-04-17 22:59:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 684 transitions. [2020-04-17 22:59:42,438 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 684 transitions. Word has length 14 [2020-04-17 22:59:42,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:42,438 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 684 transitions. [2020-04-17 22:59:42,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 684 transitions. [2020-04-17 22:59:42,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:42,439 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:42,439 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:42,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:42,642 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:42,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:42,642 INFO L82 PathProgramCache]: Analyzing trace with hash 2122716586, now seen corresponding path program 121 times [2020-04-17 22:59:42,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:42,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399764850] [2020-04-17 22:59:42,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:42,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399764850] [2020-04-17 22:59:42,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831180516] [2020-04-17 22:59:42,729 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:42,772 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:42,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:42,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:42,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:42,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180520053] [2020-04-17 22:59:42,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:42,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:42,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:42,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:42,902 INFO L87 Difference]: Start difference. First operand 260 states and 684 transitions. Second operand 17 states. [2020-04-17 22:59:43,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:43,158 INFO L93 Difference]: Finished difference Result 349 states and 864 transitions. [2020-04-17 22:59:43,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:59:43,158 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:43,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:43,159 INFO L225 Difference]: With dead ends: 349 [2020-04-17 22:59:43,159 INFO L226 Difference]: Without dead ends: 344 [2020-04-17 22:59:43,159 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:59:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-04-17 22:59:43,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2020-04-17 22:59:43,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-04-17 22:59:43,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 681 transitions. [2020-04-17 22:59:43,164 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 681 transitions. Word has length 14 [2020-04-17 22:59:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:43,165 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 681 transitions. [2020-04-17 22:59:43,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:43,165 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 681 transitions. [2020-04-17 22:59:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:43,165 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:43,165 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:43,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:43,366 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:43,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2123641068, now seen corresponding path program 122 times [2020-04-17 22:59:43,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:43,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153882558] [2020-04-17 22:59:43,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:43,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153882558] [2020-04-17 22:59:43,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527607706] [2020-04-17 22:59:43,467 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:43,505 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:43,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:43,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:43,507 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:43,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:43,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:43,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676099184] [2020-04-17 22:59:43,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:43,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:43,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:43,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:43,621 INFO L87 Difference]: Start difference. First operand 259 states and 681 transitions. Second operand 17 states. [2020-04-17 22:59:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:43,841 INFO L93 Difference]: Finished difference Result 332 states and 822 transitions. [2020-04-17 22:59:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:59:43,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:43,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:43,842 INFO L225 Difference]: With dead ends: 332 [2020-04-17 22:59:43,842 INFO L226 Difference]: Without dead ends: 314 [2020-04-17 22:59:43,843 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:43,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-04-17 22:59:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 260. [2020-04-17 22:59:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-04-17 22:59:43,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 677 transitions. [2020-04-17 22:59:43,847 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 677 transitions. Word has length 14 [2020-04-17 22:59:43,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:43,847 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 677 transitions. [2020-04-17 22:59:43,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:43,848 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 677 transitions. [2020-04-17 22:59:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:43,848 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:43,848 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:44,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:44,049 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:44,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:44,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405971, now seen corresponding path program 123 times [2020-04-17 22:59:44,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:44,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534664788] [2020-04-17 22:59:44,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:44,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534664788] [2020-04-17 22:59:44,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205244177] [2020-04-17 22:59:44,138 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:44,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 22:59:44,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:44,179 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:44,180 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:44,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:44,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:44,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143180159] [2020-04-17 22:59:44,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:44,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:44,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:44,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:44,296 INFO L87 Difference]: Start difference. First operand 260 states and 677 transitions. Second operand 17 states. [2020-04-17 22:59:44,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:44,526 INFO L93 Difference]: Finished difference Result 315 states and 779 transitions. [2020-04-17 22:59:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:59:44,526 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:44,527 INFO L225 Difference]: With dead ends: 315 [2020-04-17 22:59:44,527 INFO L226 Difference]: Without dead ends: 312 [2020-04-17 22:59:44,527 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:44,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-04-17 22:59:44,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 265. [2020-04-17 22:59:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-04-17 22:59:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-04-17 22:59:44,532 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-04-17 22:59:44,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:44,532 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-04-17 22:59:44,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:44,532 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-04-17 22:59:44,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:44,532 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:44,533 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:44,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:44,734 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:44,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:44,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1313405010, now seen corresponding path program 124 times [2020-04-17 22:59:44,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:44,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361004] [2020-04-17 22:59:44,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:44,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361004] [2020-04-17 22:59:44,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284040108] [2020-04-17 22:59:44,835 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:44,870 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:44,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:44,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:44,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:45,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:45,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:45,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251684211] [2020-04-17 22:59:45,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:45,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:45,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:45,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:45,781 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 17 states. [2020-04-17 22:59:46,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:46,018 INFO L93 Difference]: Finished difference Result 334 states and 821 transitions. [2020-04-17 22:59:46,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 22:59:46,019 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:46,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:46,020 INFO L225 Difference]: With dead ends: 334 [2020-04-17 22:59:46,020 INFO L226 Difference]: Without dead ends: 330 [2020-04-17 22:59:46,021 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:46,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-04-17 22:59:46,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-04-17 22:59:46,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-04-17 22:59:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 687 transitions. [2020-04-17 22:59:46,024 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 687 transitions. Word has length 14 [2020-04-17 22:59:46,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:46,024 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 687 transitions. [2020-04-17 22:59:46,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:46,025 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 687 transitions. [2020-04-17 22:59:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:46,025 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:46,025 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:46,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:46,226 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:46,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:46,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1313376180, now seen corresponding path program 125 times [2020-04-17 22:59:46,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:46,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866121501] [2020-04-17 22:59:46,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:46,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866121501] [2020-04-17 22:59:46,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487739537] [2020-04-17 22:59:46,333 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:46,387 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:46,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:46,388 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:46,389 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:46,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:46,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:46,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486081782] [2020-04-17 22:59:46,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:46,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:46,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:46,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:46,565 INFO L87 Difference]: Start difference. First operand 264 states and 687 transitions. Second operand 17 states. [2020-04-17 22:59:46,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:46,953 INFO L93 Difference]: Finished difference Result 351 states and 859 transitions. [2020-04-17 22:59:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:59:46,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:46,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:46,954 INFO L225 Difference]: With dead ends: 351 [2020-04-17 22:59:46,955 INFO L226 Difference]: Without dead ends: 346 [2020-04-17 22:59:46,955 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:59:46,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-04-17 22:59:46,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 269. [2020-04-17 22:59:46,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-04-17 22:59:46,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 700 transitions. [2020-04-17 22:59:46,959 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 700 transitions. Word has length 14 [2020-04-17 22:59:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:46,960 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 700 transitions. [2020-04-17 22:59:46,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:46,960 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 700 transitions. [2020-04-17 22:59:46,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:46,960 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:46,960 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:47,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:47,161 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:47,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:47,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1312481489, now seen corresponding path program 126 times [2020-04-17 22:59:47,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:47,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089118846] [2020-04-17 22:59:47,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:47,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:47,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089118846] [2020-04-17 22:59:47,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901910228] [2020-04-17 22:59:47,252 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:47,294 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:59:47,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:47,295 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:47,296 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:47,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:47,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:47,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182794389] [2020-04-17 22:59:47,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:47,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:47,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:47,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:47,414 INFO L87 Difference]: Start difference. First operand 269 states and 700 transitions. Second operand 17 states. [2020-04-17 22:59:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:47,671 INFO L93 Difference]: Finished difference Result 357 states and 870 transitions. [2020-04-17 22:59:47,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:59:47,672 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:47,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:47,673 INFO L225 Difference]: With dead ends: 357 [2020-04-17 22:59:47,673 INFO L226 Difference]: Without dead ends: 339 [2020-04-17 22:59:47,673 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-04-17 22:59:47,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-04-17 22:59:47,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 269. [2020-04-17 22:59:47,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-04-17 22:59:47,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 696 transitions. [2020-04-17 22:59:47,686 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 696 transitions. Word has length 14 [2020-04-17 22:59:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:47,686 INFO L479 AbstractCegarLoop]: Abstraction has 269 states and 696 transitions. [2020-04-17 22:59:47,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:47,687 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 696 transitions. [2020-04-17 22:59:47,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:47,687 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:47,687 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:47,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:47,891 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:47,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:47,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1284776820, now seen corresponding path program 127 times [2020-04-17 22:59:47,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:47,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054613401] [2020-04-17 22:59:47,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:48,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054613401] [2020-04-17 22:59:48,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149819935] [2020-04-17 22:59:48,025 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:48,094 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:48,095 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:48,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:48,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:48,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14243931] [2020-04-17 22:59:48,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:48,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:48,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:48,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:48,306 INFO L87 Difference]: Start difference. First operand 269 states and 696 transitions. Second operand 17 states. [2020-04-17 22:59:48,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:48,540 INFO L93 Difference]: Finished difference Result 332 states and 820 transitions. [2020-04-17 22:59:48,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 22:59:48,540 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:48,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:48,541 INFO L225 Difference]: With dead ends: 332 [2020-04-17 22:59:48,541 INFO L226 Difference]: Without dead ends: 327 [2020-04-17 22:59:48,541 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-04-17 22:59:48,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-04-17 22:59:48,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 266. [2020-04-17 22:59:48,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-04-17 22:59:48,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 689 transitions. [2020-04-17 22:59:48,546 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 689 transitions. Word has length 14 [2020-04-17 22:59:48,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:48,547 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 689 transitions. [2020-04-17 22:59:48,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 689 transitions. [2020-04-17 22:59:48,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:48,548 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:48,548 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:48,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:48,750 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:48,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:48,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1283823508, now seen corresponding path program 128 times [2020-04-17 22:59:48,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:48,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911719106] [2020-04-17 22:59:48,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:48,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911719106] [2020-04-17 22:59:48,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301935602] [2020-04-17 22:59:48,872 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:48,927 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 22:59:48,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:48,929 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:48,929 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:49,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:49,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:49,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888192465] [2020-04-17 22:59:49,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:49,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:49,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:49,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:49,113 INFO L87 Difference]: Start difference. First operand 266 states and 689 transitions. Second operand 17 states. [2020-04-17 22:59:49,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:49,239 INFO L93 Difference]: Finished difference Result 322 states and 792 transitions. [2020-04-17 22:59:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 22:59:49,239 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:49,240 INFO L225 Difference]: With dead ends: 322 [2020-04-17 22:59:49,240 INFO L226 Difference]: Without dead ends: 309 [2020-04-17 22:59:49,241 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 22:59:49,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-04-17 22:59:49,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 268. [2020-04-17 22:59:49,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-04-17 22:59:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-04-17 22:59:49,245 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-04-17 22:59:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:49,245 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-04-17 22:59:49,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:49,245 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-04-17 22:59:49,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:49,245 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:49,246 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:49,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:49,449 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:49,449 INFO L82 PathProgramCache]: Analyzing trace with hash 291274206, now seen corresponding path program 129 times [2020-04-17 22:59:49,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:49,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952254418] [2020-04-17 22:59:49,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:49,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952254418] [2020-04-17 22:59:49,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844177682] [2020-04-17 22:59:49,565 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:49,605 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 22:59:49,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:49,605 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:49,606 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:49,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:49,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:49,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752860125] [2020-04-17 22:59:49,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:49,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:49,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:49,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:49,725 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-04-17 22:59:49,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:49,790 INFO L93 Difference]: Finished difference Result 305 states and 753 transitions. [2020-04-17 22:59:49,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 22:59:49,791 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:49,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:49,792 INFO L225 Difference]: With dead ends: 305 [2020-04-17 22:59:49,792 INFO L226 Difference]: Without dead ends: 303 [2020-04-17 22:59:49,792 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-04-17 22:59:49,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-04-17 22:59:49,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 274. [2020-04-17 22:59:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-04-17 22:59:49,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 709 transitions. [2020-04-17 22:59:49,797 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 709 transitions. Word has length 14 [2020-04-17 22:59:49,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:49,797 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 709 transitions. [2020-04-17 22:59:49,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 709 transitions. [2020-04-17 22:59:49,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:49,797 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:49,797 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:49,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:49,998 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:49,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:49,999 INFO L82 PathProgramCache]: Analyzing trace with hash 291275167, now seen corresponding path program 130 times [2020-04-17 22:59:49,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:49,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031885546] [2020-04-17 22:59:50,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:50,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:50,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031885546] [2020-04-17 22:59:50,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474828558] [2020-04-17 22:59:50,112 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:50,157 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 22:59:50,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:50,158 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:50,159 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:50,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:50,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:50,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504407823] [2020-04-17 22:59:50,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:50,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:50,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:50,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:50,282 INFO L87 Difference]: Start difference. First operand 274 states and 709 transitions. Second operand 17 states. [2020-04-17 22:59:50,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:50,487 INFO L93 Difference]: Finished difference Result 325 states and 802 transitions. [2020-04-17 22:59:50,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:59:50,492 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:50,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:50,493 INFO L225 Difference]: With dead ends: 325 [2020-04-17 22:59:50,493 INFO L226 Difference]: Without dead ends: 322 [2020-04-17 22:59:50,493 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-04-17 22:59:50,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-04-17 22:59:50,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 272. [2020-04-17 22:59:50,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-04-17 22:59:50,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-04-17 22:59:50,498 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-04-17 22:59:50,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:50,498 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-04-17 22:59:50,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:50,498 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-04-17 22:59:50,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:50,499 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:50,499 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:50,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:50,700 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:50,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:50,700 INFO L82 PathProgramCache]: Analyzing trace with hash 291303997, now seen corresponding path program 131 times [2020-04-17 22:59:50,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:50,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771714860] [2020-04-17 22:59:50,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:50,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771714860] [2020-04-17 22:59:50,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10438229] [2020-04-17 22:59:50,802 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:50,844 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 22:59:50,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:50,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:50,845 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:51,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:51,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:51,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558866251] [2020-04-17 22:59:51,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:51,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:51,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:51,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-04-17 22:59:51,368 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-04-17 22:59:51,600 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 22:59:51,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:51,768 INFO L93 Difference]: Finished difference Result 348 states and 857 transitions. [2020-04-17 22:59:51,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 22:59:51,769 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:51,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:51,770 INFO L225 Difference]: With dead ends: 348 [2020-04-17 22:59:51,770 INFO L226 Difference]: Without dead ends: 344 [2020-04-17 22:59:51,770 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=178, Invalid=373, Unknown=1, NotChecked=0, Total=552 [2020-04-17 22:59:51,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-04-17 22:59:51,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 270. [2020-04-17 22:59:51,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-04-17 22:59:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 697 transitions. [2020-04-17 22:59:51,775 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 697 transitions. Word has length 14 [2020-04-17 22:59:51,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:51,775 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 697 transitions. [2020-04-17 22:59:51,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:51,775 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 697 transitions. [2020-04-17 22:59:51,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:51,775 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:51,775 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:51,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:51,976 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:51,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:51,977 INFO L82 PathProgramCache]: Analyzing trace with hash 292197727, now seen corresponding path program 132 times [2020-04-17 22:59:51,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:51,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092393954] [2020-04-17 22:59:51,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:52,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092393954] [2020-04-17 22:59:52,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186840466] [2020-04-17 22:59:52,068 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:52,110 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 22:59:52,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 22:59:52,111 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:52,112 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 22:59:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:58,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 22:59:58,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 22:59:58,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193086534] [2020-04-17 22:59:58,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 22:59:58,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 22:59:58,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 22:59:58,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-04-17 22:59:58,959 INFO L87 Difference]: Start difference. First operand 270 states and 697 transitions. Second operand 17 states. [2020-04-17 22:59:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 22:59:59,295 INFO L93 Difference]: Finished difference Result 338 states and 827 transitions. [2020-04-17 22:59:59,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 22:59:59,295 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 22:59:59,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 22:59:59,296 INFO L225 Difference]: With dead ends: 338 [2020-04-17 22:59:59,296 INFO L226 Difference]: Without dead ends: 335 [2020-04-17 22:59:59,297 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-04-17 22:59:59,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-04-17 22:59:59,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 272. [2020-04-17 22:59:59,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-04-17 22:59:59,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-04-17 22:59:59,301 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-04-17 22:59:59,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 22:59:59,302 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-04-17 22:59:59,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 22:59:59,302 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-04-17 22:59:59,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 22:59:59,302 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 22:59:59,302 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 22:59:59,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:59,503 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 22:59:59,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 22:59:59,504 INFO L82 PathProgramCache]: Analyzing trace with hash 292198688, now seen corresponding path program 133 times [2020-04-17 22:59:59,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 22:59:59,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795374667] [2020-04-17 22:59:59,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 22:59:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 22:59:59,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795374667] [2020-04-17 22:59:59,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606663416] [2020-04-17 22:59:59,596 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 22:59:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 22:59:59,639 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 22:59:59,639 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:09,890 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 22 [2020-04-17 23:00:09,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:09,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:09,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:00:09,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705098300] [2020-04-17 23:00:09,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:00:09,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:09,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:00:09,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=220, Unknown=4, NotChecked=0, Total=306 [2020-04-17 23:00:09,892 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 18 states. [2020-04-17 23:00:12,199 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 23:00:16,506 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-04-17 23:00:28,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:28,608 INFO L93 Difference]: Finished difference Result 395 states and 953 transitions. [2020-04-17 23:00:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:00:28,623 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:00:28,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:28,624 INFO L225 Difference]: With dead ends: 395 [2020-04-17 23:00:28,624 INFO L226 Difference]: Without dead ends: 386 [2020-04-17 23:00:28,624 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=247, Invalid=504, Unknown=5, NotChecked=0, Total=756 [2020-04-17 23:00:28,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-04-17 23:00:28,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 272. [2020-04-17 23:00:28,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-04-17 23:00:28,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-04-17 23:00:28,629 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-04-17 23:00:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:28,630 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-04-17 23:00:28,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:00:28,630 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-04-17 23:00:28,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:28,630 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:28,631 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:28,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:28,834 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:28,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:28,835 INFO L82 PathProgramCache]: Analyzing trace with hash 292227518, now seen corresponding path program 134 times [2020-04-17 23:00:28,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:28,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309610295] [2020-04-17 23:00:28,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:28,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309610295] [2020-04-17 23:00:28,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618821076] [2020-04-17 23:00:28,942 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:28,984 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:00:28,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:28,985 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:28,986 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:29,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:29,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:29,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817623532] [2020-04-17 23:00:29,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:29,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:29,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:29,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:29,166 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-04-17 23:00:29,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:29,506 INFO L93 Difference]: Finished difference Result 352 states and 862 transitions. [2020-04-17 23:00:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:00:29,506 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:29,507 INFO L225 Difference]: With dead ends: 352 [2020-04-17 23:00:29,507 INFO L226 Difference]: Without dead ends: 348 [2020-04-17 23:00:29,507 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:00:29,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-04-17 23:00:29,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 268. [2020-04-17 23:00:29,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-04-17 23:00:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 691 transitions. [2020-04-17 23:00:29,512 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 691 transitions. Word has length 14 [2020-04-17 23:00:29,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:29,512 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 691 transitions. [2020-04-17 23:00:29,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:29,512 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 691 transitions. [2020-04-17 23:00:29,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:29,512 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:29,513 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:29,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:29,713 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:29,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:29,714 INFO L82 PathProgramCache]: Analyzing trace with hash 319903357, now seen corresponding path program 135 times [2020-04-17 23:00:29,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:29,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234951350] [2020-04-17 23:00:29,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:29,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234951350] [2020-04-17 23:00:29,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370044505] [2020-04-17 23:00:29,804 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:29,846 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:00:29,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:29,847 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:29,848 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:29,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:29,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:29,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970465356] [2020-04-17 23:00:29,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:29,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:29,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:29,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:29,971 INFO L87 Difference]: Start difference. First operand 268 states and 691 transitions. Second operand 17 states. [2020-04-17 23:00:30,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:30,308 INFO L93 Difference]: Finished difference Result 330 states and 806 transitions. [2020-04-17 23:00:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:00:30,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:30,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:30,310 INFO L225 Difference]: With dead ends: 330 [2020-04-17 23:00:30,310 INFO L226 Difference]: Without dead ends: 327 [2020-04-17 23:00:30,310 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:00:30,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-04-17 23:00:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2020-04-17 23:00:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-04-17 23:00:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-04-17 23:00:30,329 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-04-17 23:00:30,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:30,330 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-04-17 23:00:30,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:30,330 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-04-17 23:00:30,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:30,330 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:30,330 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:30,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:30,531 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:30,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:30,532 INFO L82 PathProgramCache]: Analyzing trace with hash 319904318, now seen corresponding path program 136 times [2020-04-17 23:00:30,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:30,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187783831] [2020-04-17 23:00:30,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:30,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:30,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187783831] [2020-04-17 23:00:30,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991932413] [2020-04-17 23:00:30,625 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:30,665 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:00:30,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:30,666 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:30,666 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:31,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:31,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:31,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999038295] [2020-04-17 23:00:31,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:31,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:31,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:31,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:31,522 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-04-17 23:00:31,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:31,876 INFO L93 Difference]: Finished difference Result 365 states and 887 transitions. [2020-04-17 23:00:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:00:31,877 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:31,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:31,878 INFO L225 Difference]: With dead ends: 365 [2020-04-17 23:00:31,878 INFO L226 Difference]: Without dead ends: 360 [2020-04-17 23:00:31,878 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:00:31,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-04-17 23:00:31,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 272. [2020-04-17 23:00:31,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-04-17 23:00:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 703 transitions. [2020-04-17 23:00:31,883 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 703 transitions. Word has length 14 [2020-04-17 23:00:31,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:31,883 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 703 transitions. [2020-04-17 23:00:31,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:31,883 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 703 transitions. [2020-04-17 23:00:31,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:31,884 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:31,884 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:32,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:32,085 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:32,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:32,085 INFO L82 PathProgramCache]: Analyzing trace with hash 319933148, now seen corresponding path program 137 times [2020-04-17 23:00:32,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:32,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011293523] [2020-04-17 23:00:32,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:32,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011293523] [2020-04-17 23:00:32,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501387601] [2020-04-17 23:00:32,189 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:32,257 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:00:32,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:32,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:32,260 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:32,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:32,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:32,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441153077] [2020-04-17 23:00:32,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:32,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:32,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:32,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:32,414 INFO L87 Difference]: Start difference. First operand 272 states and 703 transitions. Second operand 17 states. [2020-04-17 23:00:32,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:32,708 INFO L93 Difference]: Finished difference Result 363 states and 882 transitions. [2020-04-17 23:00:32,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:00:32,708 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:32,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:32,709 INFO L225 Difference]: With dead ends: 363 [2020-04-17 23:00:32,709 INFO L226 Difference]: Without dead ends: 358 [2020-04-17 23:00:32,709 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:00:32,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-04-17 23:00:32,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 271. [2020-04-17 23:00:32,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-04-17 23:00:32,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 700 transitions. [2020-04-17 23:00:32,714 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 700 transitions. Word has length 14 [2020-04-17 23:00:32,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:32,714 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 700 transitions. [2020-04-17 23:00:32,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:32,715 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 700 transitions. [2020-04-17 23:00:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:32,715 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:32,715 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:32,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:32,919 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:32,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:32,920 INFO L82 PathProgramCache]: Analyzing trace with hash 320857630, now seen corresponding path program 138 times [2020-04-17 23:00:32,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:32,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897506159] [2020-04-17 23:00:32,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:33,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897506159] [2020-04-17 23:00:33,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712276530] [2020-04-17 23:00:33,001 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:33,044 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:00:33,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:33,045 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:33,045 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:33,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:33,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:33,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425193366] [2020-04-17 23:00:33,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:33,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:33,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:33,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:33,160 INFO L87 Difference]: Start difference. First operand 271 states and 700 transitions. Second operand 17 states. [2020-04-17 23:00:33,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:33,426 INFO L93 Difference]: Finished difference Result 333 states and 812 transitions. [2020-04-17 23:00:33,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:00:33,426 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:33,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:33,427 INFO L225 Difference]: With dead ends: 333 [2020-04-17 23:00:33,427 INFO L226 Difference]: Without dead ends: 315 [2020-04-17 23:00:33,427 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:00:33,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-04-17 23:00:33,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 266. [2020-04-17 23:00:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-04-17 23:00:33,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-04-17 23:00:33,432 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-04-17 23:00:33,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:33,432 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-04-17 23:00:33,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:33,432 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-04-17 23:00:33,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:33,432 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:33,433 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:33,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:33,633 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:33,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:33,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1429448084, now seen corresponding path program 139 times [2020-04-17 23:00:33,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:33,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274343764] [2020-04-17 23:00:33,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:33,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274343764] [2020-04-17 23:00:33,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319531273] [2020-04-17 23:00:33,745 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:33,789 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:33,790 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:33,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:33,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:33,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574680962] [2020-04-17 23:00:33,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:33,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:33,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:33,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:33,913 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-04-17 23:00:34,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:34,010 INFO L93 Difference]: Finished difference Result 296 states and 732 transitions. [2020-04-17 23:00:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:00:34,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:34,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:34,011 INFO L225 Difference]: With dead ends: 296 [2020-04-17 23:00:34,011 INFO L226 Difference]: Without dead ends: 294 [2020-04-17 23:00:34,012 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:00:34,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-04-17 23:00:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 270. [2020-04-17 23:00:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-04-17 23:00:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 695 transitions. [2020-04-17 23:00:34,017 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 695 transitions. Word has length 14 [2020-04-17 23:00:34,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:34,017 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 695 transitions. [2020-04-17 23:00:34,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:34,017 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 695 transitions. [2020-04-17 23:00:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:34,017 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:34,018 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:34,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:34,218 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:34,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:34,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1429447123, now seen corresponding path program 140 times [2020-04-17 23:00:34,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:34,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955658311] [2020-04-17 23:00:34,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:34,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955658311] [2020-04-17 23:00:34,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635606920] [2020-04-17 23:00:34,336 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:34,399 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:00:34,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:34,401 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:34,401 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:34,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:34,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:34,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138944372] [2020-04-17 23:00:34,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:34,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:34,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:34,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:34,601 INFO L87 Difference]: Start difference. First operand 270 states and 695 transitions. Second operand 17 states. [2020-04-17 23:00:34,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:34,844 INFO L93 Difference]: Finished difference Result 328 states and 803 transitions. [2020-04-17 23:00:34,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:00:34,845 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:34,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:34,845 INFO L225 Difference]: With dead ends: 328 [2020-04-17 23:00:34,845 INFO L226 Difference]: Without dead ends: 325 [2020-04-17 23:00:34,846 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:00:34,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-04-17 23:00:34,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 268. [2020-04-17 23:00:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-04-17 23:00:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-04-17 23:00:34,850 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-04-17 23:00:34,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:34,851 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-04-17 23:00:34,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:34,851 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-04-17 23:00:34,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:34,851 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:34,851 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:35,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:35,055 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:35,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:35,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1429418293, now seen corresponding path program 141 times [2020-04-17 23:00:35,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:35,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777308185] [2020-04-17 23:00:35,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:35,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777308185] [2020-04-17 23:00:35,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229709624] [2020-04-17 23:00:35,148 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:35,190 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:00:35,190 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:35,191 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:35,191 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:39,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:39,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:39,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973970029] [2020-04-17 23:00:39,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:39,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:39,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:39,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:39,406 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-04-17 23:00:40,893 WARN L192 SmtUtils]: Spent 464.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 23:00:40,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:40,913 INFO L93 Difference]: Finished difference Result 344 states and 841 transitions. [2020-04-17 23:00:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:00:40,913 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:40,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:40,914 INFO L225 Difference]: With dead ends: 344 [2020-04-17 23:00:40,914 INFO L226 Difference]: Without dead ends: 340 [2020-04-17 23:00:40,915 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=186, Invalid=412, Unknown=2, NotChecked=0, Total=600 [2020-04-17 23:00:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-04-17 23:00:40,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 266. [2020-04-17 23:00:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-04-17 23:00:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-04-17 23:00:40,920 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-04-17 23:00:40,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:40,920 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-04-17 23:00:40,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:40,920 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-04-17 23:00:40,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:40,920 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:40,920 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:41,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:41,121 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:41,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:41,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1428524563, now seen corresponding path program 142 times [2020-04-17 23:00:41,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:41,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388081165] [2020-04-17 23:00:41,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:41,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388081165] [2020-04-17 23:00:41,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70614609] [2020-04-17 23:00:41,204 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:41,246 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:00:41,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:41,247 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:41,248 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:41,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:41,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:00:41,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161120192] [2020-04-17 23:00:41,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:00:41,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:41,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:00:41,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:00:41,911 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-04-17 23:00:42,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:00:42,285 INFO L93 Difference]: Finished difference Result 331 states and 805 transitions. [2020-04-17 23:00:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:00:42,285 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:00:42,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:00:42,286 INFO L225 Difference]: With dead ends: 331 [2020-04-17 23:00:42,286 INFO L226 Difference]: Without dead ends: 328 [2020-04-17 23:00:42,287 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:00:42,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-04-17 23:00:42,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 268. [2020-04-17 23:00:42,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-04-17 23:00:42,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-04-17 23:00:42,292 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-04-17 23:00:42,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:00:42,292 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-04-17 23:00:42,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:00:42,293 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-04-17 23:00:42,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:00:42,293 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:00:42,293 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:00:42,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:42,496 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:00:42,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:00:42,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1428523602, now seen corresponding path program 143 times [2020-04-17 23:00:42,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:00:42,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298044494] [2020-04-17 23:00:42,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:00:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:00:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:42,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298044494] [2020-04-17 23:00:42,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534780876] [2020-04-17 23:00:42,576 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:00:42,611 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:00:42,611 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:00:42,612 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:00:42,612 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:00:52,892 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 22 [2020-04-17 23:00:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:00:52,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:00:52,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:00:52,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5523413] [2020-04-17 23:00:52,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:00:52,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:00:52,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:00:52,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=230, Unknown=4, NotChecked=0, Total=306 [2020-04-17 23:00:52,894 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 18 states. [2020-04-17 23:00:55,424 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 26 [2020-04-17 23:00:59,567 WARN L192 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-04-17 23:01:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:05,685 INFO L93 Difference]: Finished difference Result 378 states and 909 transitions. [2020-04-17 23:01:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:01:05,685 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:01:05,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:05,686 INFO L225 Difference]: With dead ends: 378 [2020-04-17 23:01:05,686 INFO L226 Difference]: Without dead ends: 373 [2020-04-17 23:01:05,686 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=252, Invalid=556, Unknown=4, NotChecked=0, Total=812 [2020-04-17 23:01:05,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-04-17 23:01:05,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 268. [2020-04-17 23:01:05,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-04-17 23:01:05,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 689 transitions. [2020-04-17 23:01:05,690 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 689 transitions. Word has length 14 [2020-04-17 23:01:05,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:05,690 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 689 transitions. [2020-04-17 23:01:05,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:01:05,691 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 689 transitions. [2020-04-17 23:01:05,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:05,691 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:05,691 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:05,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:05,895 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:05,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1428494772, now seen corresponding path program 144 times [2020-04-17 23:01:05,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:05,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679643928] [2020-04-17 23:01:05,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:05,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:05,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679643928] [2020-04-17 23:01:05,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364609337] [2020-04-17 23:01:05,973 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:06,015 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:01:06,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:06,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:06,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:12,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:12,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:12,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278396102] [2020-04-17 23:01:12,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:12,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:12,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:12,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:12,205 INFO L87 Difference]: Start difference. First operand 268 states and 689 transitions. Second operand 17 states. [2020-04-17 23:01:12,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:12,587 INFO L93 Difference]: Finished difference Result 339 states and 826 transitions. [2020-04-17 23:01:12,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:01:12,587 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:12,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:12,588 INFO L225 Difference]: With dead ends: 339 [2020-04-17 23:01:12,588 INFO L226 Difference]: Without dead ends: 335 [2020-04-17 23:01:12,588 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:12,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-04-17 23:01:12,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 264. [2020-04-17 23:01:12,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-04-17 23:01:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-04-17 23:01:12,593 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-04-17 23:01:12,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:12,593 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-04-17 23:01:12,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:12,593 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-04-17 23:01:12,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:12,594 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:12,594 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:12,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:12,795 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:12,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:12,795 INFO L82 PathProgramCache]: Analyzing trace with hash -792218594, now seen corresponding path program 145 times [2020-04-17 23:01:12,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:12,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614969676] [2020-04-17 23:01:12,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:12,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614969676] [2020-04-17 23:01:12,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291230066] [2020-04-17 23:01:12,914 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:12,955 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:12,956 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:13,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:13,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:13,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526864822] [2020-04-17 23:01:13,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:13,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:13,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:13,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:13,089 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 17 states. [2020-04-17 23:01:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:13,214 INFO L93 Difference]: Finished difference Result 287 states and 713 transitions. [2020-04-17 23:01:13,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:01:13,215 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:13,215 INFO L225 Difference]: With dead ends: 287 [2020-04-17 23:01:13,216 INFO L226 Difference]: Without dead ends: 285 [2020-04-17 23:01:13,216 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:01:13,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-04-17 23:01:13,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 266. [2020-04-17 23:01:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-04-17 23:01:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 683 transitions. [2020-04-17 23:01:13,220 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 683 transitions. Word has length 14 [2020-04-17 23:01:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:13,220 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 683 transitions. [2020-04-17 23:01:13,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:13,220 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 683 transitions. [2020-04-17 23:01:13,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:13,221 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:13,221 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:13,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:13,422 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:13,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:13,422 INFO L82 PathProgramCache]: Analyzing trace with hash -792217633, now seen corresponding path program 146 times [2020-04-17 23:01:13,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:13,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76993818] [2020-04-17 23:01:13,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:13,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76993818] [2020-04-17 23:01:13,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745486175] [2020-04-17 23:01:13,527 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:13,569 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:13,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:13,570 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:13,570 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:13,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:13,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:13,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:13,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706986012] [2020-04-17 23:01:13,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:13,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:13,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:13,699 INFO L87 Difference]: Start difference. First operand 266 states and 683 transitions. Second operand 17 states. [2020-04-17 23:01:13,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:13,946 INFO L93 Difference]: Finished difference Result 317 states and 778 transitions. [2020-04-17 23:01:13,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:01:13,947 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:13,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:13,948 INFO L225 Difference]: With dead ends: 317 [2020-04-17 23:01:13,948 INFO L226 Difference]: Without dead ends: 314 [2020-04-17 23:01:13,948 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:01:13,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-04-17 23:01:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 264. [2020-04-17 23:01:13,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-04-17 23:01:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 677 transitions. [2020-04-17 23:01:13,952 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 677 transitions. Word has length 14 [2020-04-17 23:01:13,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:13,953 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 677 transitions. [2020-04-17 23:01:13,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:13,953 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 677 transitions. [2020-04-17 23:01:13,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:13,953 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:13,953 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:14,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:14,154 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:14,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:14,155 INFO L82 PathProgramCache]: Analyzing trace with hash -792188803, now seen corresponding path program 147 times [2020-04-17 23:01:14,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:14,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929716147] [2020-04-17 23:01:14,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:14,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929716147] [2020-04-17 23:01:14,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407701385] [2020-04-17 23:01:14,249 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:14,293 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:01:14,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:14,294 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:14,300 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:14,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:14,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:14,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705614759] [2020-04-17 23:01:14,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:14,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:14,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:14,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:14,741 INFO L87 Difference]: Start difference. First operand 264 states and 677 transitions. Second operand 17 states. [2020-04-17 23:01:15,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:15,269 INFO L93 Difference]: Finished difference Result 330 states and 807 transitions. [2020-04-17 23:01:15,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:01:15,270 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:15,271 INFO L225 Difference]: With dead ends: 330 [2020-04-17 23:01:15,271 INFO L226 Difference]: Without dead ends: 326 [2020-04-17 23:01:15,272 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:01:15,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-04-17 23:01:15,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 262. [2020-04-17 23:01:15,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-04-17 23:01:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-04-17 23:01:15,276 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-04-17 23:01:15,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:15,276 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-04-17 23:01:15,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-04-17 23:01:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:15,277 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:15,277 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:15,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:15,478 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:15,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:15,478 INFO L82 PathProgramCache]: Analyzing trace with hash -771662804, now seen corresponding path program 148 times [2020-04-17 23:01:15,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:15,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516392419] [2020-04-17 23:01:15,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:15,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516392419] [2020-04-17 23:01:15,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703208512] [2020-04-17 23:01:15,574 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:15,615 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:01:15,616 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:15,616 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:15,617 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:15,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:15,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:15,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556015301] [2020-04-17 23:01:15,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:15,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:15,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:15,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:15,757 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-04-17 23:01:15,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:15,920 INFO L93 Difference]: Finished difference Result 278 states and 694 transitions. [2020-04-17 23:01:15,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:01:15,920 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:15,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:15,921 INFO L225 Difference]: With dead ends: 278 [2020-04-17 23:01:15,921 INFO L226 Difference]: Without dead ends: 276 [2020-04-17 23:01:15,922 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:01:15,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-04-17 23:01:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 262. [2020-04-17 23:01:15,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-04-17 23:01:15,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2020-04-17 23:01:15,925 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 14 [2020-04-17 23:01:15,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:15,926 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2020-04-17 23:01:15,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:15,926 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2020-04-17 23:01:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:15,926 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:15,926 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:16,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:16,127 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:16,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:16,128 INFO L82 PathProgramCache]: Analyzing trace with hash -771661843, now seen corresponding path program 149 times [2020-04-17 23:01:16,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:16,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77069134] [2020-04-17 23:01:16,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:16,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77069134] [2020-04-17 23:01:16,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129759151] [2020-04-17 23:01:16,216 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:16,259 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:01:16,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:16,261 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:16,261 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:16,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:16,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:16,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626757102] [2020-04-17 23:01:16,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:16,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:16,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:16,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:16,377 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand 17 states. [2020-04-17 23:01:16,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:16,673 INFO L93 Difference]: Finished difference Result 306 states and 753 transitions. [2020-04-17 23:01:16,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:01:16,674 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:16,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:16,675 INFO L225 Difference]: With dead ends: 306 [2020-04-17 23:01:16,675 INFO L226 Difference]: Without dead ends: 303 [2020-04-17 23:01:16,675 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:01:16,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-04-17 23:01:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 260. [2020-04-17 23:01:16,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-04-17 23:01:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 665 transitions. [2020-04-17 23:01:16,680 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 665 transitions. Word has length 14 [2020-04-17 23:01:16,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:16,680 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 665 transitions. [2020-04-17 23:01:16,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 665 transitions. [2020-04-17 23:01:16,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:16,680 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:16,680 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:16,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:16,881 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:16,882 INFO L82 PathProgramCache]: Analyzing trace with hash -770999714, now seen corresponding path program 150 times [2020-04-17 23:01:16,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:16,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267626050] [2020-04-17 23:01:16,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:16,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267626050] [2020-04-17 23:01:16,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314723701] [2020-04-17 23:01:16,965 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:17,008 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:01:17,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:17,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:01:17,009 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:17,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:17,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 23:01:17,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442305831] [2020-04-17 23:01:17,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:01:17,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:17,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:01:17,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:01:17,028 INFO L87 Difference]: Start difference. First operand 260 states and 665 transitions. Second operand 11 states. [2020-04-17 23:01:17,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:17,175 INFO L93 Difference]: Finished difference Result 269 states and 677 transitions. [2020-04-17 23:01:17,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:01:17,175 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 23:01:17,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:17,176 INFO L225 Difference]: With dead ends: 269 [2020-04-17 23:01:17,176 INFO L226 Difference]: Without dead ends: 267 [2020-04-17 23:01:17,176 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:01:17,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-04-17 23:01:17,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2020-04-17 23:01:17,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-04-17 23:01:17,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 659 transitions. [2020-04-17 23:01:17,180 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 659 transitions. Word has length 14 [2020-04-17 23:01:17,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:17,180 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 659 transitions. [2020-04-17 23:01:17,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:01:17,180 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 659 transitions. [2020-04-17 23:01:17,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:17,180 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:17,180 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:17,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:17,381 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:17,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:17,382 INFO L82 PathProgramCache]: Analyzing trace with hash -770977394, now seen corresponding path program 151 times [2020-04-17 23:01:17,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:17,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257675248] [2020-04-17 23:01:17,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:17,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:17,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257675248] [2020-04-17 23:01:17,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115402600] [2020-04-17 23:01:17,457 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:17,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:17,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:17,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:17,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:17,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:17,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943405530] [2020-04-17 23:01:17,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:17,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:17,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:17,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:17,629 INFO L87 Difference]: Start difference. First operand 256 states and 659 transitions. Second operand 17 states. [2020-04-17 23:01:18,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:18,000 INFO L93 Difference]: Finished difference Result 298 states and 754 transitions. [2020-04-17 23:01:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:01:18,001 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:18,002 INFO L225 Difference]: With dead ends: 298 [2020-04-17 23:01:18,002 INFO L226 Difference]: Without dead ends: 294 [2020-04-17 23:01:18,002 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-04-17 23:01:18,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-04-17 23:01:18,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 257. [2020-04-17 23:01:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-04-17 23:01:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 662 transitions. [2020-04-17 23:01:18,007 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 662 transitions. Word has length 14 [2020-04-17 23:01:18,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:18,007 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 662 transitions. [2020-04-17 23:01:18,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:18,007 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 662 transitions. [2020-04-17 23:01:18,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:18,007 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:18,007 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:18,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:18,208 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:18,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:18,209 INFO L82 PathProgramCache]: Analyzing trace with hash -770969923, now seen corresponding path program 152 times [2020-04-17 23:01:18,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:18,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43369537] [2020-04-17 23:01:18,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:18,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43369537] [2020-04-17 23:01:18,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467900478] [2020-04-17 23:01:18,284 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:18,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:18,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:18,329 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:18,330 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:18,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:18,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:18,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405512805] [2020-04-17 23:01:18,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:18,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:18,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:18,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:18,459 INFO L87 Difference]: Start difference. First operand 257 states and 662 transitions. Second operand 17 states. [2020-04-17 23:01:18,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:18,771 INFO L93 Difference]: Finished difference Result 313 states and 786 transitions. [2020-04-17 23:01:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:01:18,771 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:18,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:18,772 INFO L225 Difference]: With dead ends: 313 [2020-04-17 23:01:18,772 INFO L226 Difference]: Without dead ends: 310 [2020-04-17 23:01:18,772 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-04-17 23:01:18,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 259. [2020-04-17 23:01:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-04-17 23:01:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 669 transitions. [2020-04-17 23:01:18,775 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 669 transitions. Word has length 14 [2020-04-17 23:01:18,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:18,776 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 669 transitions. [2020-04-17 23:01:18,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:18,776 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 669 transitions. [2020-04-17 23:01:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:18,776 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:18,776 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:18,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:18,977 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:18,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:18,977 INFO L82 PathProgramCache]: Analyzing trace with hash -770948564, now seen corresponding path program 153 times [2020-04-17 23:01:18,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:18,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362372548] [2020-04-17 23:01:18,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:19,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362372548] [2020-04-17 23:01:19,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309243800] [2020-04-17 23:01:19,048 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:19,093 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:01:19,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:19,094 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:19,095 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:20,067 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:20,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:20,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:20,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187689571] [2020-04-17 23:01:20,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:20,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:20,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:20,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=183, Unknown=2, NotChecked=0, Total=272 [2020-04-17 23:01:20,086 INFO L87 Difference]: Start difference. First operand 259 states and 669 transitions. Second operand 17 states. [2020-04-17 23:01:20,674 WARN L192 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-04-17 23:01:20,960 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2020-04-17 23:01:21,833 WARN L192 SmtUtils]: Spent 773.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-04-17 23:01:21,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:21,843 INFO L93 Difference]: Finished difference Result 314 states and 795 transitions. [2020-04-17 23:01:21,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:01:21,844 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:21,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:21,845 INFO L225 Difference]: With dead ends: 314 [2020-04-17 23:01:21,845 INFO L226 Difference]: Without dead ends: 309 [2020-04-17 23:01:21,845 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=307, Invalid=621, Unknown=2, NotChecked=0, Total=930 [2020-04-17 23:01:21,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-04-17 23:01:21,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 259. [2020-04-17 23:01:21,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-04-17 23:01:21,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 668 transitions. [2020-04-17 23:01:21,850 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 668 transitions. Word has length 14 [2020-04-17 23:01:21,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:21,850 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 668 transitions. [2020-04-17 23:01:21,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:21,850 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 668 transitions. [2020-04-17 23:01:21,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:21,850 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:21,850 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:22,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:22,051 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:22,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:22,052 INFO L82 PathProgramCache]: Analyzing trace with hash -770947603, now seen corresponding path program 154 times [2020-04-17 23:01:22,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:22,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830586833] [2020-04-17 23:01:22,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:22,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830586833] [2020-04-17 23:01:22,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983710918] [2020-04-17 23:01:22,125 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:22,165 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:01:22,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:22,165 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:22,166 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:22,258 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:22,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:22,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:01:22,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550923369] [2020-04-17 23:01:22,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:01:22,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:22,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:01:22,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=221, Unknown=1, NotChecked=0, Total=306 [2020-04-17 23:01:22,735 INFO L87 Difference]: Start difference. First operand 259 states and 668 transitions. Second operand 18 states. [2020-04-17 23:01:23,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:23,133 INFO L93 Difference]: Finished difference Result 333 states and 837 transitions. [2020-04-17 23:01:23,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:01:23,133 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:01:23,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:23,134 INFO L225 Difference]: With dead ends: 333 [2020-04-17 23:01:23,134 INFO L226 Difference]: Without dead ends: 328 [2020-04-17 23:01:23,135 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=274, Invalid=595, Unknown=1, NotChecked=0, Total=870 [2020-04-17 23:01:23,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-04-17 23:01:23,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 259. [2020-04-17 23:01:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-04-17 23:01:23,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 671 transitions. [2020-04-17 23:01:23,139 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 671 transitions. Word has length 14 [2020-04-17 23:01:23,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:23,139 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 671 transitions. [2020-04-17 23:01:23,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:01:23,139 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 671 transitions. [2020-04-17 23:01:23,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:23,140 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:23,140 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:23,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:23,343 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:23,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:23,344 INFO L82 PathProgramCache]: Analyzing trace with hash -770739283, now seen corresponding path program 155 times [2020-04-17 23:01:23,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:23,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992140464] [2020-04-17 23:01:23,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:23,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992140464] [2020-04-17 23:01:23,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426500551] [2020-04-17 23:01:23,431 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:23,474 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:01:23,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:23,475 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:23,476 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:31,650 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 21 [2020-04-17 23:01:31,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:31,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:31,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:01:31,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277781818] [2020-04-17 23:01:31,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:01:31,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:31,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:01:31,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=234, Unknown=3, NotChecked=0, Total=306 [2020-04-17 23:01:31,653 INFO L87 Difference]: Start difference. First operand 259 states and 671 transitions. Second operand 18 states. [2020-04-17 23:01:33,908 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2020-04-17 23:01:42,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:42,019 INFO L93 Difference]: Finished difference Result 367 states and 906 transitions. [2020-04-17 23:01:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:01:42,020 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:01:42,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:42,020 INFO L225 Difference]: With dead ends: 367 [2020-04-17 23:01:42,021 INFO L226 Difference]: Without dead ends: 360 [2020-04-17 23:01:42,021 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=213, Invalid=540, Unknown=3, NotChecked=0, Total=756 [2020-04-17 23:01:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-04-17 23:01:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 261. [2020-04-17 23:01:42,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-04-17 23:01:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 678 transitions. [2020-04-17 23:01:42,026 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 678 transitions. Word has length 14 [2020-04-17 23:01:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:42,026 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 678 transitions. [2020-04-17 23:01:42,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:01:42,026 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 678 transitions. [2020-04-17 23:01:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:42,026 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:42,027 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:42,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:42,230 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:42,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:42,230 INFO L82 PathProgramCache]: Analyzing trace with hash -770076193, now seen corresponding path program 156 times [2020-04-17 23:01:42,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:42,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147818379] [2020-04-17 23:01:42,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:42,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147818379] [2020-04-17 23:01:42,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357364003] [2020-04-17 23:01:42,300 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:42,340 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:01:42,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:42,340 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:42,341 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:43,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:43,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:43,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619924365] [2020-04-17 23:01:43,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:43,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:43,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:43,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:43,033 INFO L87 Difference]: Start difference. First operand 261 states and 678 transitions. Second operand 17 states. [2020-04-17 23:01:43,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:43,472 INFO L93 Difference]: Finished difference Result 362 states and 911 transitions. [2020-04-17 23:01:43,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:01:43,473 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:43,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:43,474 INFO L225 Difference]: With dead ends: 362 [2020-04-17 23:01:43,474 INFO L226 Difference]: Without dead ends: 358 [2020-04-17 23:01:43,474 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-04-17 23:01:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-04-17 23:01:43,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 265. [2020-04-17 23:01:43,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-04-17 23:01:43,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 692 transitions. [2020-04-17 23:01:43,478 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 692 transitions. Word has length 14 [2020-04-17 23:01:43,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:43,478 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 692 transitions. [2020-04-17 23:01:43,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:43,478 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 692 transitions. [2020-04-17 23:01:43,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:43,479 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:43,479 INFO L425 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:43,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:43,680 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:43,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:43,680 INFO L82 PathProgramCache]: Analyzing trace with hash -770054834, now seen corresponding path program 157 times [2020-04-17 23:01:43,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:43,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714267086] [2020-04-17 23:01:43,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:43,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714267086] [2020-04-17 23:01:43,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038841490] [2020-04-17 23:01:43,750 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:43,792 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:43,792 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:44,448 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:44,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:44,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:44,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222289409] [2020-04-17 23:01:44,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:44,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:44,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:44,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:44,465 INFO L87 Difference]: Start difference. First operand 265 states and 692 transitions. Second operand 17 states. [2020-04-17 23:01:44,800 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-04-17 23:01:46,096 WARN L192 SmtUtils]: Spent 885.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-04-17 23:01:46,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:46,110 INFO L93 Difference]: Finished difference Result 322 states and 822 transitions. [2020-04-17 23:01:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:01:46,111 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:46,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:46,112 INFO L225 Difference]: With dead ends: 322 [2020-04-17 23:01:46,112 INFO L226 Difference]: Without dead ends: 316 [2020-04-17 23:01:46,112 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=358, Invalid=698, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 23:01:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-04-17 23:01:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 265. [2020-04-17 23:01:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-04-17 23:01:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 690 transitions. [2020-04-17 23:01:46,121 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 690 transitions. Word has length 14 [2020-04-17 23:01:46,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:46,121 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 690 transitions. [2020-04-17 23:01:46,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 690 transitions. [2020-04-17 23:01:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:46,121 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:46,121 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:46,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:46,322 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:46,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:46,323 INFO L82 PathProgramCache]: Analyzing trace with hash -770053873, now seen corresponding path program 158 times [2020-04-17 23:01:46,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:46,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569175751] [2020-04-17 23:01:46,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:46,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569175751] [2020-04-17 23:01:46,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185396449] [2020-04-17 23:01:46,398 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:46,439 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:46,439 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:46,440 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:46,440 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:46,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:47,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:47,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:01:47,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103926521] [2020-04-17 23:01:47,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:01:47,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:47,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:01:47,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=215, Unknown=2, NotChecked=0, Total=306 [2020-04-17 23:01:47,446 INFO L87 Difference]: Start difference. First operand 265 states and 690 transitions. Second operand 18 states. [2020-04-17 23:01:47,925 WARN L192 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-04-17 23:01:48,300 WARN L192 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2020-04-17 23:01:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:50,139 INFO L93 Difference]: Finished difference Result 395 states and 997 transitions. [2020-04-17 23:01:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:01:50,140 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-04-17 23:01:50,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:50,141 INFO L225 Difference]: With dead ends: 395 [2020-04-17 23:01:50,141 INFO L226 Difference]: Without dead ends: 386 [2020-04-17 23:01:50,141 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=385, Invalid=873, Unknown=2, NotChecked=0, Total=1260 [2020-04-17 23:01:50,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-04-17 23:01:50,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 262. [2020-04-17 23:01:50,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-04-17 23:01:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 685 transitions. [2020-04-17 23:01:50,146 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 685 transitions. Word has length 14 [2020-04-17 23:01:50,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:50,147 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 685 transitions. [2020-04-17 23:01:50,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:01:50,147 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 685 transitions. [2020-04-17 23:01:50,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:50,147 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:50,147 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:50,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:50,348 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:50,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:50,349 INFO L82 PathProgramCache]: Analyzing trace with hash -770025043, now seen corresponding path program 159 times [2020-04-17 23:01:50,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:50,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295536336] [2020-04-17 23:01:50,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:50,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295536336] [2020-04-17 23:01:50,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578849352] [2020-04-17 23:01:50,443 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:50,485 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:01:50,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:50,486 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:50,486 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:50,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:01:50,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:50,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:50,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:50,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179418703] [2020-04-17 23:01:50,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:50,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:50,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:50,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:50,625 INFO L87 Difference]: Start difference. First operand 262 states and 685 transitions. Second operand 17 states. [2020-04-17 23:01:51,305 WARN L192 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-04-17 23:01:51,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:51,633 INFO L93 Difference]: Finished difference Result 358 states and 909 transitions. [2020-04-17 23:01:51,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:01:51,634 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:51,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:51,635 INFO L225 Difference]: With dead ends: 358 [2020-04-17 23:01:51,635 INFO L226 Difference]: Without dead ends: 353 [2020-04-17 23:01:51,635 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=338, Invalid=718, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 23:01:51,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-04-17 23:01:51,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 262. [2020-04-17 23:01:51,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-04-17 23:01:51,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 685 transitions. [2020-04-17 23:01:51,640 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 685 transitions. Word has length 14 [2020-04-17 23:01:51,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:51,640 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 685 transitions. [2020-04-17 23:01:51,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:51,640 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 685 transitions. [2020-04-17 23:01:51,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:51,641 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:51,641 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:51,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:51,843 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:51,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:51,844 INFO L82 PathProgramCache]: Analyzing trace with hash -763589443, now seen corresponding path program 160 times [2020-04-17 23:01:51,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:51,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404294324] [2020-04-17 23:01:51,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:51,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404294324] [2020-04-17 23:01:51,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988029376] [2020-04-17 23:01:51,917 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:51,955 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:01:51,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:51,955 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:51,956 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:53,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:53,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:53,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886955321] [2020-04-17 23:01:53,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:53,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:53,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:53,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:53,155 INFO L87 Difference]: Start difference. First operand 262 states and 685 transitions. Second operand 17 states. [2020-04-17 23:01:53,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:53,519 INFO L93 Difference]: Finished difference Result 350 states and 871 transitions. [2020-04-17 23:01:53,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:01:53,519 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:53,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:53,520 INFO L225 Difference]: With dead ends: 350 [2020-04-17 23:01:53,520 INFO L226 Difference]: Without dead ends: 347 [2020-04-17 23:01:53,521 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:53,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-04-17 23:01:53,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 265. [2020-04-17 23:01:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-04-17 23:01:53,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 696 transitions. [2020-04-17 23:01:53,530 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 696 transitions. Word has length 14 [2020-04-17 23:01:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:53,530 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 696 transitions. [2020-04-17 23:01:53,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 696 transitions. [2020-04-17 23:01:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:53,530 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:53,530 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:53,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:53,731 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:53,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:53,732 INFO L82 PathProgramCache]: Analyzing trace with hash -763588482, now seen corresponding path program 161 times [2020-04-17 23:01:53,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:53,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996864187] [2020-04-17 23:01:53,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:53,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996864187] [2020-04-17 23:01:53,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529541511] [2020-04-17 23:01:53,805 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:53,848 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:01:53,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:53,849 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:53,850 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:54,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:54,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:54,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819764288] [2020-04-17 23:01:54,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:54,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:54,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:54,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:54,024 INFO L87 Difference]: Start difference. First operand 265 states and 696 transitions. Second operand 17 states. [2020-04-17 23:01:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:54,563 INFO L93 Difference]: Finished difference Result 380 states and 945 transitions. [2020-04-17 23:01:54,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:01:54,563 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:54,564 INFO L225 Difference]: With dead ends: 380 [2020-04-17 23:01:54,564 INFO L226 Difference]: Without dead ends: 375 [2020-04-17 23:01:54,564 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-04-17 23:01:54,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 266. [2020-04-17 23:01:54,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-04-17 23:01:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 698 transitions. [2020-04-17 23:01:54,569 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 698 transitions. Word has length 14 [2020-04-17 23:01:54,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:54,570 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 698 transitions. [2020-04-17 23:01:54,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 698 transitions. [2020-04-17 23:01:54,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:54,570 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:54,570 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:54,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:54,771 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:54,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:54,771 INFO L82 PathProgramCache]: Analyzing trace with hash -763559652, now seen corresponding path program 162 times [2020-04-17 23:01:54,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:54,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72711158] [2020-04-17 23:01:54,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:54,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72711158] [2020-04-17 23:01:54,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104093148] [2020-04-17 23:01:54,850 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:54,892 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:01:54,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:01:54,894 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:54,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:01:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:55,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:01:55,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:01:55,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122499319] [2020-04-17 23:01:55,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:01:55,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:01:55,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:01:55,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:01:55,051 INFO L87 Difference]: Start difference. First operand 266 states and 698 transitions. Second operand 17 states. [2020-04-17 23:01:55,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:01:55,397 INFO L93 Difference]: Finished difference Result 366 states and 912 transitions. [2020-04-17 23:01:55,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:01:55,397 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:01:55,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:01:55,398 INFO L225 Difference]: With dead ends: 366 [2020-04-17 23:01:55,398 INFO L226 Difference]: Without dead ends: 362 [2020-04-17 23:01:55,398 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:01:55,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-04-17 23:01:55,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 264. [2020-04-17 23:01:55,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-04-17 23:01:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 692 transitions. [2020-04-17 23:01:55,408 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 692 transitions. Word has length 14 [2020-04-17 23:01:55,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:01:55,408 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 692 transitions. [2020-04-17 23:01:55,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:01:55,408 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 692 transitions. [2020-04-17 23:01:55,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:01:55,408 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:01:55,408 INFO L425 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:01:55,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:55,609 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:01:55,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:01:55,610 INFO L82 PathProgramCache]: Analyzing trace with hash -743033653, now seen corresponding path program 163 times [2020-04-17 23:01:55,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:01:55,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503337732] [2020-04-17 23:01:55,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:01:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:01:55,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503337732] [2020-04-17 23:01:55,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920624505] [2020-04-17 23:01:55,692 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:01:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:01:55,741 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:01:55,741 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:00,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:00,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-04-17 23:02:00,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023249974] [2020-04-17 23:02:00,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:02:00,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:00,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:02:00,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:02:00,141 INFO L87 Difference]: Start difference. First operand 264 states and 692 transitions. Second operand 17 states. [2020-04-17 23:02:00,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:00,699 INFO L93 Difference]: Finished difference Result 357 states and 890 transitions. [2020-04-17 23:02:00,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:02:00,699 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-04-17 23:02:00,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:00,700 INFO L225 Difference]: With dead ends: 357 [2020-04-17 23:02:00,700 INFO L226 Difference]: Without dead ends: 354 [2020-04-17 23:02:00,701 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-04-17 23:02:00,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-04-17 23:02:00,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 266. [2020-04-17 23:02:00,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-04-17 23:02:00,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 700 transitions. [2020-04-17 23:02:00,705 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 700 transitions. Word has length 14 [2020-04-17 23:02:00,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:00,706 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 700 transitions. [2020-04-17 23:02:00,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:02:00,706 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 700 transitions. [2020-04-17 23:02:00,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:00,706 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:00,706 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:00,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:00,910 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:00,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:00,910 INFO L82 PathProgramCache]: Analyzing trace with hash -743032692, now seen corresponding path program 164 times [2020-04-17 23:02:00,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:00,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904202102] [2020-04-17 23:02:00,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:00,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:00,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904202102] [2020-04-17 23:02:00,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697351292] [2020-04-17 23:02:00,995 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:01,037 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:01,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:01,038 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:01,039 INFO L287 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2020-04-17 23:02:09,254 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 22 [2020-04-17 23:02:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:09,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:09,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-04-17 23:02:09,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801843295] [2020-04-17 23:02:09,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:02:09,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:09,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:02:09,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=230, Unknown=3, NotChecked=0, Total=306 [2020-04-17 23:02:09,256 INFO L87 Difference]: Start difference. First operand 266 states and 700 transitions. Second operand 18 states. [2020-04-17 23:02:09,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-04-17 23:02:09,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:09,458 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 23:02:09,463 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 23:02:09,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 11:02:09 BasicIcfg [2020-04-17 23:02:09,463 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 23:02:09,465 INFO L168 Benchmark]: Toolchain (without parser) took 289998.29 ms. Allocated memory was 138.4 MB in the beginning and 171.4 MB in the end (delta: 33.0 MB). Free memory was 101.4 MB in the beginning and 92.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:09,465 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-17 23:02:09,465 INFO L168 Benchmark]: CACSL2BoogieTranslator took 678.39 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 99.5 MB in the beginning and 162.0 MB in the end (delta: -62.5 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:09,466 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.54 ms. Allocated memory is still 202.9 MB. Free memory was 162.0 MB in the beginning and 160.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:09,466 INFO L168 Benchmark]: Boogie Preprocessor took 26.44 ms. Allocated memory is still 202.9 MB. Free memory was 160.0 MB in the beginning and 158.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:09,466 INFO L168 Benchmark]: RCFGBuilder took 400.79 ms. Allocated memory is still 202.9 MB. Free memory was 158.6 MB in the beginning and 138.1 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:09,467 INFO L168 Benchmark]: TraceAbstraction took 288825.65 ms. Allocated memory was 202.9 MB in the beginning and 171.4 MB in the end (delta: -31.5 MB). Free memory was 138.1 MB in the beginning and 92.1 MB in the end (delta: 45.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-04-17 23:02:09,469 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 678.39 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 99.5 MB in the beginning and 162.0 MB in the end (delta: -62.5 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.54 ms. Allocated memory is still 202.9 MB. Free memory was 162.0 MB in the beginning and 160.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.44 ms. Allocated memory is still 202.9 MB. Free memory was 160.0 MB in the beginning and 158.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 400.79 ms. Allocated memory is still 202.9 MB. Free memory was 158.6 MB in the beginning and 138.1 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 288825.65 ms. Allocated memory was 202.9 MB in the beginning and 171.4 MB in the end (delta: -31.5 MB). Free memory was 138.1 MB in the beginning and 92.1 MB in the end (delta: 45.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 59 ProgramPointsBefore, 20 ProgramPointsAfterwards, 57 TransitionsBefore, 16 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 553 VarBasedMoverChecksPositive, 10 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 879 CheckedPairsTotal, 48 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 711]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 711). Cancelled while BasicCegarLoop was constructing difference of abstraction (266states) and FLOYD_HOARE automaton (currently 2 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (1 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 288.6s, OverallIterations: 192, TraceHistogramMax: 6, AutomataDifference: 123.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 2535 SDtfs, 17374 SDslu, 16929 SDs, 0 SdLazy, 12075 SolverSat, 4609 SolverUnsat, 35 SolverUnknown, 0 SolverNotchecked, 58.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4876 GetRequests, 916 SyntacticMatches, 172 SemanticMatches, 3788 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 19797 ImplicationChecksByTransitivity, 173.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=274occurred in iteration=157, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 191 MinimizatonAttempts, 9293 StatesRemovedByMinimization, 189 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 114.8s InterpolantComputationTime, 4738 NumberOfCodeBlocks, 4738 NumberOfCodeBlocksAsserted, 582 NumberOfCheckSat, 4362 ConstructedInterpolants, 65 QuantifiedInterpolants, 460019 SizeOfPredicates, 184 NumberOfNonLiveVariables, 16062 ConjunctsInSsa, 1805 ConjunctsInUnsatCore, 376 InterpolantComputations, 10 PerfectInterpolantSequences, 50/1798 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown