/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 14:30:53,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 14:30:53,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 14:30:53,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 14:30:53,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 14:30:53,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 14:30:53,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 14:30:53,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 14:30:53,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 14:30:53,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 14:30:53,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 14:30:53,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 14:30:53,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 14:30:53,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 14:30:53,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 14:30:53,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 14:30:53,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 14:30:53,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 14:30:53,164 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 14:30:53,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 14:30:53,172 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 14:30:53,173 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 14:30:53,175 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 14:30:53,176 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 14:30:53,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 14:30:53,180 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 14:30:53,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 14:30:53,182 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 14:30:53,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 14:30:53,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 14:30:53,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 14:30:53,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 14:30:53,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 14:30:53,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 14:30:53,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 14:30:53,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 14:30:53,195 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 14:30:53,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 14:30:53,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 14:30:53,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 14:30:53,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 14:30:53,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-04-17 14:30:53,224 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 14:30:53,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 14:30:53,226 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 14:30:53,226 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 14:30:53,227 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 14:30:53,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 14:30:53,227 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 14:30:53,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 14:30:53,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 14:30:53,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 14:30:53,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 14:30:53,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 14:30:53,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 14:30:53,230 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 14:30:53,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 14:30:53,230 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 14:30:53,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 14:30:53,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 14:30:53,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 14:30:53,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 14:30:53,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 14:30:53,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 14:30:53,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 14:30:53,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 14:30:53,232 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 14:30:53,232 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 14:30:53,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 14:30:53,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 14:30:53,233 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-04-17 14:30:53,233 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 14:30:53,563 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 14:30:53,586 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 14:30:53,588 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 14:30:53,589 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 14:30:53,589 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 14:30:53,590 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-04-17 14:30:53,668 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf4cc4cb2/a34d26228e694704be41e28d8c431b87/FLAGfad13f19c [2020-04-17 14:30:54,165 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 14:30:54,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-04-17 14:30:54,186 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf4cc4cb2/a34d26228e694704be41e28d8c431b87/FLAGfad13f19c [2020-04-17 14:30:54,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf4cc4cb2/a34d26228e694704be41e28d8c431b87 [2020-04-17 14:30:54,501 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 14:30:54,519 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 14:30:54,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 14:30:54,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 14:30:54,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 14:30:54,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 02:30:54" (1/1) ... [2020-04-17 14:30:54,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b9b647a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:54, skipping insertion in model container [2020-04-17 14:30:54,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 02:30:54" (1/1) ... [2020-04-17 14:30:54,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 14:30:54,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 14:30:55,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 14:30:55,192 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 14:30:55,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 14:30:55,340 INFO L208 MainTranslator]: Completed translation [2020-04-17 14:30:55,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:55 WrapperNode [2020-04-17 14:30:55,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 14:30:55,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 14:30:55,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 14:30:55,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 14:30:55,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:55" (1/1) ... [2020-04-17 14:30:55,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:55" (1/1) ... [2020-04-17 14:30:55,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 14:30:55,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 14:30:55,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 14:30:55,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 14:30:55,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:55" (1/1) ... [2020-04-17 14:30:55,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:55" (1/1) ... [2020-04-17 14:30:55,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:55" (1/1) ... [2020-04-17 14:30:55,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:55" (1/1) ... [2020-04-17 14:30:55,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:55" (1/1) ... [2020-04-17 14:30:55,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:55" (1/1) ... [2020-04-17 14:30:55,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:55" (1/1) ... [2020-04-17 14:30:55,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 14:30:55,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 14:30:55,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 14:30:55,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 14:30:55,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:55" (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 14:30:55,507 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 14:30:55,508 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 14:30:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 14:30:55,508 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 14:30:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 14:30:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 14:30:55,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 14:30:55,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 14:30:55,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 14:30:55,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 14:30:55,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 14:30:55,511 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 14:30:55,868 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 14:30:55,868 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 14:30:55,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 02:30:55 BoogieIcfgContainer [2020-04-17 14:30:55,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 14:30:55,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 14:30:55,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 14:30:55,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 14:30:55,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 02:30:54" (1/3) ... [2020-04-17 14:30:55,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27cafa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 02:30:55, skipping insertion in model container [2020-04-17 14:30:55,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 02:30:55" (2/3) ... [2020-04-17 14:30:55,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27cafa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 02:30:55, skipping insertion in model container [2020-04-17 14:30:55,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 02:30:55" (3/3) ... [2020-04-17 14:30:55,881 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-04-17 14:30:55,892 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 14:30:55,893 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 14:30:55,900 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 14:30:55,902 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 14:30:55,927 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,928 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,928 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,928 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,929 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,929 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,930 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,930 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,930 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,931 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,931 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,931 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,931 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,932 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,932 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,932 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,933 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,933 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,933 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,934 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,934 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,934 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,934 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,935 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,935 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,935 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,936 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,936 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,939 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,940 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,940 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,940 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,940 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,941 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,948 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,949 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,949 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,949 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,950 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,950 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 14:30:55,964 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 14:30:55,982 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 14:30:55,982 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 14:30:55,982 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 14:30:55,982 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 14:30:55,983 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 14:30:55,983 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 14:30:55,983 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 14:30:55,983 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 14:30:55,998 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-04-17 14:30:56,000 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-17 14:30:56,045 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-17 14:30:56,045 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 14:30:56,053 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-04-17 14:30:56,055 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-17 14:30:56,079 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-17 14:30:56,079 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 14:30:56,080 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-04-17 14:30:56,082 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-04-17 14:30:56,084 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 14:30:57,256 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-04-17 14:30:57,496 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-04-17 14:30:57,496 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-04-17 14:30:57,500 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-04-17 14:30:57,512 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 14:30:57,514 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 14:30:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 14:30:57,521 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:57,522 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 14:30:57,522 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:57,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-04-17 14:30:57,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:57,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611991720] [2020-04-17 14:30:57,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:57,779 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 14:30:57,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611991720] [2020-04-17 14:30:57,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:30:57,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 14:30:57,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003284372] [2020-04-17 14:30:57,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 14:30:57,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:57,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 14:30:57,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 14:30:57,811 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 14:30:57,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:57,908 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-04-17 14:30:57,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 14:30:57,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 14:30:57,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:57,925 INFO L225 Difference]: With dead ends: 75 [2020-04-17 14:30:57,925 INFO L226 Difference]: Without dead ends: 42 [2020-04-17 14:30:57,926 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 14:30:57,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-04-17 14:30:57,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-04-17 14:30:57,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 14:30:57,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-04-17 14:30:57,977 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-04-17 14:30:57,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:57,978 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-04-17 14:30:57,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 14:30:57,978 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-04-17 14:30:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 14:30:57,982 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:57,982 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:57,983 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:57,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:57,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-04-17 14:30:57,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:57,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613593680] [2020-04-17 14:30:57,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:58,087 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 14:30:58,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613593680] [2020-04-17 14:30:58,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:30:58,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 14:30:58,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319220019] [2020-04-17 14:30:58,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 14:30:58,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:58,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 14:30:58,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 14:30:58,093 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-04-17 14:30:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:58,127 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-04-17 14:30:58,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 14:30:58,128 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 14:30:58,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:58,129 INFO L225 Difference]: With dead ends: 56 [2020-04-17 14:30:58,129 INFO L226 Difference]: Without dead ends: 50 [2020-04-17 14:30:58,130 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-04-17 14:30:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-17 14:30:58,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-04-17 14:30:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 14:30:58,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-04-17 14:30:58,138 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-04-17 14:30:58,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:58,139 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-04-17 14:30:58,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 14:30:58,139 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-04-17 14:30:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 14:30:58,140 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:58,140 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:58,140 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:58,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:58,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-04-17 14:30:58,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:58,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73645630] [2020-04-17 14:30:58,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:58,225 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 14:30:58,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73645630] [2020-04-17 14:30:58,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:30:58,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 14:30:58,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949869412] [2020-04-17 14:30:58,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 14:30:58,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:58,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 14:30:58,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-17 14:30:58,228 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-04-17 14:30:58,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:58,313 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-04-17 14:30:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 14:30:58,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 14:30:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:58,316 INFO L225 Difference]: With dead ends: 78 [2020-04-17 14:30:58,316 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 14:30:58,318 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:30:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 14:30:58,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-04-17 14:30:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 14:30:58,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 14:30:58,333 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-04-17 14:30:58,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:58,334 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 14:30:58,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 14:30:58,335 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 14:30:58,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 14:30:58,338 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:58,338 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:58,338 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:58,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:58,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-04-17 14:30:58,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:58,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110811825] [2020-04-17 14:30:58,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:58,407 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 14:30:58,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110811825] [2020-04-17 14:30:58,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:30:58,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 14:30:58,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830629378] [2020-04-17 14:30:58,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 14:30:58,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:58,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 14:30:58,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-17 14:30:58,410 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-04-17 14:30:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:58,494 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-04-17 14:30:58,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 14:30:58,494 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 14:30:58,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:58,495 INFO L225 Difference]: With dead ends: 54 [2020-04-17 14:30:58,495 INFO L226 Difference]: Without dead ends: 43 [2020-04-17 14:30:58,496 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:30:58,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-17 14:30:58,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-04-17 14:30:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-17 14:30:58,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-04-17 14:30:58,501 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-04-17 14:30:58,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:58,501 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-04-17 14:30:58,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 14:30:58,502 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-04-17 14:30:58,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 14:30:58,502 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:58,503 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:58,503 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:58,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:58,503 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-04-17 14:30:58,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:58,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963188705] [2020-04-17 14:30:58,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:58,583 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 14:30:58,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963188705] [2020-04-17 14:30:58,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 14:30:58,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 14:30:58,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256835820] [2020-04-17 14:30:58,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 14:30:58,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:58,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 14:30:58,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-04-17 14:30:58,588 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-04-17 14:30:58,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:58,716 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-04-17 14:30:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 14:30:58,716 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 14:30:58,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:58,717 INFO L225 Difference]: With dead ends: 57 [2020-04-17 14:30:58,717 INFO L226 Difference]: Without dead ends: 51 [2020-04-17 14:30:58,718 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:30:58,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-04-17 14:30:58,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-04-17 14:30:58,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 14:30:58,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-04-17 14:30:58,724 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-04-17 14:30:58,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:58,724 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-04-17 14:30:58,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 14:30:58,724 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-04-17 14:30:58,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:30:58,725 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:58,725 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:58,725 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:58,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:58,726 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-04-17 14:30:58,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:58,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434484349] [2020-04-17 14:30:58,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:58,803 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 14:30:58,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434484349] [2020-04-17 14:30:58,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736447115] [2020-04-17 14:30:58,804 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 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 14:30:58,874 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:30:58,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:58,876 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 14:30:58,881 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:58,915 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:58,929 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 14:30:58,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:58,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 14:30:58,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035167488] [2020-04-17 14:30:58,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 14:30:58,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:58,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 14:30:58,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-04-17 14:30:58,931 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-04-17 14:30:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:59,046 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-04-17 14:30:59,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 14:30:59,047 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 14:30:59,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:59,048 INFO L225 Difference]: With dead ends: 48 [2020-04-17 14:30:59,048 INFO L226 Difference]: Without dead ends: 43 [2020-04-17 14:30:59,048 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:30:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-17 14:30:59,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-04-17 14:30:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-17 14:30:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-04-17 14:30:59,060 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-04-17 14:30:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:59,060 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-04-17 14:30:59,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 14:30:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-04-17 14:30:59,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:30:59,061 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:59,062 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:59,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:59,263 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:59,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:59,264 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-04-17 14:30:59,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:59,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163107402] [2020-04-17 14:30:59,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:59,356 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 14:30:59,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163107402] [2020-04-17 14:30:59,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671718320] [2020-04-17 14:30:59,358 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 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 14:30:59,415 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:30:59,415 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:59,416 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 14:30:59,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:59,432 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 14:30:59,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:59,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-17 14:30:59,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63372647] [2020-04-17 14:30:59,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 14:30:59,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:59,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 14:30:59,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 14:30:59,434 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-04-17 14:30:59,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:30:59,506 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-04-17 14:30:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 14:30:59,506 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-04-17 14:30:59,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:30:59,507 INFO L225 Difference]: With dead ends: 54 [2020-04-17 14:30:59,507 INFO L226 Difference]: Without dead ends: 48 [2020-04-17 14:30:59,508 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:30:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-04-17 14:30:59,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-04-17 14:30:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 14:30:59,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-04-17 14:30:59,517 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-04-17 14:30:59,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:30:59,518 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-04-17 14:30:59,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 14:30:59,518 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-04-17 14:30:59,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:30:59,520 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:30:59,520 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:30:59,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:30:59,729 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:30:59,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:30:59,729 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-04-17 14:30:59,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:30:59,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714786133] [2020-04-17 14:30:59,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:30:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:30:59,795 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 14:30:59,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714786133] [2020-04-17 14:30:59,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715611731] [2020-04-17 14:30:59,796 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 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 14:30:59,857 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:30:59,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:30:59,858 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 14:30:59,860 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:30:59,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:30:59,893 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 14:30:59,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:30:59,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 14:30:59,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965135345] [2020-04-17 14:30:59,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 14:30:59,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:30:59,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 14:30:59,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 14:30:59,896 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-04-17 14:31:00,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:00,043 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-04-17 14:31:00,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 14:31:00,043 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 14:31:00,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:00,044 INFO L225 Difference]: With dead ends: 58 [2020-04-17 14:31:00,044 INFO L226 Difference]: Without dead ends: 52 [2020-04-17 14:31:00,045 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:00,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-04-17 14:31:00,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-04-17 14:31:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 14:31:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-04-17 14:31:00,055 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-04-17 14:31:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:00,056 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-04-17 14:31:00,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 14:31:00,061 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-04-17 14:31:00,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:31:00,062 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:00,062 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:00,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:00,263 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:00,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:00,264 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-04-17 14:31:00,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:00,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452960216] [2020-04-17 14:31:00,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:00,328 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 14:31:00,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452960216] [2020-04-17 14:31:00,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522978801] [2020-04-17 14:31:00,329 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 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 14:31:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:00,378 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 14:31:00,379 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:00,402 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 14:31:00,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:00,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-17 14:31:00,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624064041] [2020-04-17 14:31:00,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 14:31:00,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:00,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 14:31:00,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-04-17 14:31:00,404 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-04-17 14:31:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:00,533 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-04-17 14:31:00,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:31:00,534 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-04-17 14:31:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:00,535 INFO L225 Difference]: With dead ends: 78 [2020-04-17 14:31:00,535 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 14:31:00,536 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 14:31:00,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-04-17 14:31:00,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 14:31:00,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-04-17 14:31:00,542 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-04-17 14:31:00,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:00,542 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-04-17 14:31:00,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 14:31:00,543 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-04-17 14:31:00,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 14:31:00,543 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:00,544 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:00,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:00,748 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:00,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:00,748 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-04-17 14:31:00,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:00,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38839002] [2020-04-17 14:31:00,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:00,827 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 14:31:00,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38839002] [2020-04-17 14:31:00,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277471575] [2020-04-17 14:31:00,828 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 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 14:31:00,884 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:00,884 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:00,885 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:31:00,886 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:00,911 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 14:31:00,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:00,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 14:31:00,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229109933] [2020-04-17 14:31:00,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 14:31:00,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:00,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 14:31:00,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 14:31:00,913 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-04-17 14:31:01,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:01,146 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-04-17 14:31:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:31:01,147 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 14:31:01,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:01,148 INFO L225 Difference]: With dead ends: 62 [2020-04-17 14:31:01,148 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 14:31:01,149 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:01,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 14:31:01,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-04-17 14:31:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-04-17 14:31:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-04-17 14:31:01,153 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-04-17 14:31:01,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:01,153 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-04-17 14:31:01,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 14:31:01,154 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-04-17 14:31:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:31:01,154 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:01,154 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:01,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:01,358 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:01,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:01,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-04-17 14:31:01,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:01,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508765131] [2020-04-17 14:31:01,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:01,419 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 14:31:01,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508765131] [2020-04-17 14:31:01,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645457555] [2020-04-17 14:31:01,419 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 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 14:31:01,468 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 14:31:01,468 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:01,469 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:31:01,470 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:01,484 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 14:31:01,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:01,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-17 14:31:01,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668811967] [2020-04-17 14:31:01,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 14:31:01,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:01,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 14:31:01,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-04-17 14:31:01,486 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-04-17 14:31:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:01,612 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-04-17 14:31:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:31:01,612 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-04-17 14:31:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:01,613 INFO L225 Difference]: With dead ends: 64 [2020-04-17 14:31:01,613 INFO L226 Difference]: Without dead ends: 58 [2020-04-17 14:31:01,614 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:01,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-04-17 14:31:01,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-04-17 14:31:01,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-17 14:31:01,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-04-17 14:31:01,626 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-04-17 14:31:01,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:01,626 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-04-17 14:31:01,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 14:31:01,626 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-04-17 14:31:01,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:31:01,630 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:01,630 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:01,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:01,841 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:01,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:01,842 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-04-17 14:31:01,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:01,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52872003] [2020-04-17 14:31:01,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:01,928 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 14:31:01,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52872003] [2020-04-17 14:31:01,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172674638] [2020-04-17 14:31:01,929 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 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 14:31:01,972 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:01,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:01,973 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:31:01,974 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:01,990 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:01,997 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 14:31:01,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:01,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 14:31:01,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664032006] [2020-04-17 14:31:01,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 14:31:01,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:01,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 14:31:02,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:31:02,000 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-04-17 14:31:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:02,162 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-04-17 14:31:02,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:31:02,162 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 14:31:02,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:02,163 INFO L225 Difference]: With dead ends: 61 [2020-04-17 14:31:02,163 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 14:31:02,164 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:02,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 14:31:02,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-04-17 14:31:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-17 14:31:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-04-17 14:31:02,168 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-04-17 14:31:02,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:02,169 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-04-17 14:31:02,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 14:31:02,169 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-04-17 14:31:02,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:31:02,170 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:02,170 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:02,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:02,374 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:02,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:02,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-04-17 14:31:02,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:02,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787663514] [2020-04-17 14:31:02,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:02,450 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 14:31:02,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787663514] [2020-04-17 14:31:02,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555683046] [2020-04-17 14:31:02,451 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 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 14:31:02,502 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:02,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:02,504 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:31:02,505 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:02,518 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 14:31:02,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:02,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-17 14:31:02,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973845521] [2020-04-17 14:31:02,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 14:31:02,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:02,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 14:31:02,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-04-17 14:31:02,523 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-04-17 14:31:02,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:02,653 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-04-17 14:31:02,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:31:02,654 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-04-17 14:31:02,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:02,655 INFO L225 Difference]: With dead ends: 77 [2020-04-17 14:31:02,655 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 14:31:02,656 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:02,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 14:31:02,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-04-17 14:31:02,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-17 14:31:02,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-04-17 14:31:02,663 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-04-17 14:31:02,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:02,663 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-04-17 14:31:02,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 14:31:02,663 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-04-17 14:31:02,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:31:02,664 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:02,664 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:02,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:02,868 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:02,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:02,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-04-17 14:31:02,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:02,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912933501] [2020-04-17 14:31:02,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:02,927 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 14:31:02,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912933501] [2020-04-17 14:31:02,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961117863] [2020-04-17 14:31:02,928 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 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 14:31:02,977 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 14:31:02,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:02,978 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:31:02,979 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:02,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:03,008 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 14:31:03,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:03,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 14:31:03,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978208127] [2020-04-17 14:31:03,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 14:31:03,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:03,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 14:31:03,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:31:03,010 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-04-17 14:31:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:03,254 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-04-17 14:31:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:31:03,254 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 14:31:03,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:03,255 INFO L225 Difference]: With dead ends: 58 [2020-04-17 14:31:03,255 INFO L226 Difference]: Without dead ends: 50 [2020-04-17 14:31:03,256 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:31:03,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-17 14:31:03,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-04-17 14:31:03,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-04-17 14:31:03,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-04-17 14:31:03,259 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-04-17 14:31:03,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:03,259 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-04-17 14:31:03,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 14:31:03,259 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-04-17 14:31:03,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 14:31:03,260 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:03,260 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:03,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:03,464 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:03,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:03,465 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-04-17 14:31:03,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:03,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913743776] [2020-04-17 14:31:03,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:03,553 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 14:31:03,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913743776] [2020-04-17 14:31:03,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628478407] [2020-04-17 14:31:03,554 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 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 14:31:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:03,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 14:31:03,601 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:03,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:03,629 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 14:31:03,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:03,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 14:31:03,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568327257] [2020-04-17 14:31:03,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 14:31:03,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:03,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 14:31:03,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:31:03,631 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-04-17 14:31:03,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:03,850 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-04-17 14:31:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:31:03,850 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 14:31:03,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:03,851 INFO L225 Difference]: With dead ends: 60 [2020-04-17 14:31:03,851 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 14:31:03,852 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:31:03,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 14:31:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-04-17 14:31:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 14:31:03,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 14:31:03,855 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-04-17 14:31:03,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:03,856 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 14:31:03,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 14:31:03,856 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 14:31:03,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:31:03,857 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:03,857 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:04,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:04,060 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:04,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:04,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-04-17 14:31:04,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:04,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789162381] [2020-04-17 14:31:04,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:04,142 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 14:31:04,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789162381] [2020-04-17 14:31:04,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649119831] [2020-04-17 14:31:04,143 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 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 14:31:04,183 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:04,183 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:04,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:31:04,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:04,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:04,205 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 14:31:04,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:04,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 14:31:04,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185874540] [2020-04-17 14:31:04,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 14:31:04,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:04,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 14:31:04,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:31:04,208 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-04-17 14:31:04,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:04,413 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-04-17 14:31:04,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:31:04,418 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 14:31:04,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:04,419 INFO L225 Difference]: With dead ends: 54 [2020-04-17 14:31:04,419 INFO L226 Difference]: Without dead ends: 49 [2020-04-17 14:31:04,420 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:31:04,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-04-17 14:31:04,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-04-17 14:31:04,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-04-17 14:31:04,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-04-17 14:31:04,423 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-04-17 14:31:04,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:04,425 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-04-17 14:31:04,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 14:31:04,426 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-04-17 14:31:04,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:31:04,426 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:04,426 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:04,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:04,627 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:04,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:04,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-04-17 14:31:04,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:04,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574284048] [2020-04-17 14:31:04,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:04,739 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 14:31:04,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574284048] [2020-04-17 14:31:04,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883841046] [2020-04-17 14:31:04,740 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 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 14:31:04,794 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:31:04,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:04,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:31:04,795 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:04,802 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 14:31:04,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:04,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 14:31:04,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415375808] [2020-04-17 14:31:04,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 14:31:04,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:04,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 14:31:04,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:31:04,805 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-04-17 14:31:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:04,910 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-04-17 14:31:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 14:31:04,912 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 14:31:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:04,913 INFO L225 Difference]: With dead ends: 60 [2020-04-17 14:31:04,913 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 14:31:04,913 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 14:31:04,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-04-17 14:31:04,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 14:31:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-04-17 14:31:04,917 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-04-17 14:31:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:04,918 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-04-17 14:31:04,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 14:31:04,918 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-04-17 14:31:04,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:31:04,919 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:04,919 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:05,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:05,122 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:05,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:05,123 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-04-17 14:31:05,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:05,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102377374] [2020-04-17 14:31:05,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:05,202 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 14:31:05,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102377374] [2020-04-17 14:31:05,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229715759] [2020-04-17 14:31:05,203 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 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 14:31:05,253 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:05,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:05,254 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:31:05,255 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:05,275 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:05,283 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 14:31:05,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:05,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 14:31:05,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109525830] [2020-04-17 14:31:05,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 14:31:05,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:05,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 14:31:05,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:31:05,285 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-04-17 14:31:05,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:05,426 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-04-17 14:31:05,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 14:31:05,426 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 14:31:05,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:05,427 INFO L225 Difference]: With dead ends: 66 [2020-04-17 14:31:05,427 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 14:31:05,428 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:05,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 14:31:05,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-04-17 14:31:05,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-17 14:31:05,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-04-17 14:31:05,431 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-04-17 14:31:05,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:05,432 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-04-17 14:31:05,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 14:31:05,432 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-04-17 14:31:05,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:31:05,432 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:05,432 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:05,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:05,636 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:05,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-04-17 14:31:05,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:05,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225127650] [2020-04-17 14:31:05,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:05,725 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 14:31:05,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225127650] [2020-04-17 14:31:05,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800143724] [2020-04-17 14:31:05,726 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 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 14:31:05,789 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:31:05,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:05,790 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:31:05,792 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:05,834 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 14:31:05,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:05,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 14:31:05,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684769053] [2020-04-17 14:31:05,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 14:31:05,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:05,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 14:31:05,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:31:05,839 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-04-17 14:31:05,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:05,998 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-04-17 14:31:05,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:31:05,998 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 14:31:05,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:05,999 INFO L225 Difference]: With dead ends: 67 [2020-04-17 14:31:05,999 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 14:31:06,000 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:31:06,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 14:31:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-04-17 14:31:06,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-04-17 14:31:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-04-17 14:31:06,003 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-04-17 14:31:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:06,004 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-04-17 14:31:06,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 14:31:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-04-17 14:31:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:31:06,005 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:06,005 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:06,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:06,209 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:06,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:06,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-04-17 14:31:06,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:06,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581343750] [2020-04-17 14:31:06,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:06,299 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 14:31:06,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581343750] [2020-04-17 14:31:06,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122744457] [2020-04-17 14:31:06,300 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 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 14:31:06,348 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:31:06,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:06,349 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:31:06,350 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:06,362 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:06,369 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 14:31:06,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:06,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 14:31:06,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194326105] [2020-04-17 14:31:06,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 14:31:06,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:06,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 14:31:06,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:31:06,370 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-04-17 14:31:06,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:06,594 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-04-17 14:31:06,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:31:06,594 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 14:31:06,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:06,595 INFO L225 Difference]: With dead ends: 69 [2020-04-17 14:31:06,595 INFO L226 Difference]: Without dead ends: 63 [2020-04-17 14:31:06,596 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:31:06,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-17 14:31:06,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-04-17 14:31:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 14:31:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 14:31:06,599 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-04-17 14:31:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:06,599 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 14:31:06,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 14:31:06,599 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 14:31:06,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:31:06,600 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:06,600 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:06,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:06,804 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:06,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:06,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-04-17 14:31:06,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:06,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000356375] [2020-04-17 14:31:06,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:06,879 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 14:31:06,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000356375] [2020-04-17 14:31:06,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689575553] [2020-04-17 14:31:06,880 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 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 14:31:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:06,920 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 14:31:06,921 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:06,935 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 14:31:06,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:06,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 14:31:06,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260313225] [2020-04-17 14:31:06,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 14:31:06,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:06,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 14:31:06,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-17 14:31:06,937 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-04-17 14:31:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:07,111 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-04-17 14:31:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:07,112 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 14:31:07,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:07,114 INFO L225 Difference]: With dead ends: 88 [2020-04-17 14:31:07,114 INFO L226 Difference]: Without dead ends: 82 [2020-04-17 14:31:07,114 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:31:07,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-04-17 14:31:07,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-04-17 14:31:07,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 14:31:07,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-04-17 14:31:07,117 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-04-17 14:31:07,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:07,118 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-04-17 14:31:07,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 14:31:07,118 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-04-17 14:31:07,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 14:31:07,118 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:07,119 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:07,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:07,322 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:07,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:07,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-04-17 14:31:07,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:07,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929090162] [2020-04-17 14:31:07,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:07,379 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 14:31:07,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929090162] [2020-04-17 14:31:07,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725578387] [2020-04-17 14:31:07,380 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 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 14:31:07,421 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:07,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:07,422 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:31:07,423 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:07,445 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 14:31:07,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:07,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 14:31:07,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841293286] [2020-04-17 14:31:07,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 14:31:07,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:07,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 14:31:07,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:31:07,447 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-04-17 14:31:07,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:07,716 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-04-17 14:31:07,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:31:07,717 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 14:31:07,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:07,718 INFO L225 Difference]: With dead ends: 69 [2020-04-17 14:31:07,718 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 14:31:07,718 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:31:07,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 14:31:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-04-17 14:31:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-17 14:31:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-04-17 14:31:07,722 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-04-17 14:31:07,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:07,722 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-04-17 14:31:07,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 14:31:07,722 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-04-17 14:31:07,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:31:07,722 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:07,723 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:07,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:07,926 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:07,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-04-17 14:31:07,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:07,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841687348] [2020-04-17 14:31:07,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:07,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:08,014 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 14:31:08,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841687348] [2020-04-17 14:31:08,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757855355] [2020-04-17 14:31:08,015 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 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 14:31:08,084 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:31:08,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:08,086 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:31:08,087 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:08,107 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 14:31:08,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:08,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 14:31:08,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373586024] [2020-04-17 14:31:08,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 14:31:08,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:08,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 14:31:08,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:31:08,109 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-04-17 14:31:08,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:08,249 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-04-17 14:31:08,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:31:08,250 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 14:31:08,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:08,251 INFO L225 Difference]: With dead ends: 74 [2020-04-17 14:31:08,251 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 14:31:08,252 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:31:08,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 14:31:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-04-17 14:31:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 14:31:08,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 14:31:08,255 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-04-17 14:31:08,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:08,255 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 14:31:08,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 14:31:08,255 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 14:31:08,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:31:08,256 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:08,256 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:08,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:08,460 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:08,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:08,460 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-04-17 14:31:08,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:08,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840345457] [2020-04-17 14:31:08,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:08,534 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 14:31:08,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840345457] [2020-04-17 14:31:08,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967890525] [2020-04-17 14:31:08,535 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 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 14:31:08,578 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:08,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:08,578 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:31:08,579 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:08,616 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:08,627 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 14:31:08,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:08,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 14:31:08,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098052905] [2020-04-17 14:31:08,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:31:08,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:08,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:31:08,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:31:08,629 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-04-17 14:31:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:08,831 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-04-17 14:31:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:31:08,831 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 14:31:08,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:08,832 INFO L225 Difference]: With dead ends: 71 [2020-04-17 14:31:08,833 INFO L226 Difference]: Without dead ends: 65 [2020-04-17 14:31:08,833 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:31:08,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-04-17 14:31:08,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-04-17 14:31:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 14:31:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 14:31:08,836 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-04-17 14:31:08,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:08,836 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 14:31:08,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:31:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 14:31:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:31:08,837 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:08,837 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:09,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:09,038 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:09,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:09,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-04-17 14:31:09,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:09,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502767507] [2020-04-17 14:31:09,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:09,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:09,104 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 14:31:09,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502767507] [2020-04-17 14:31:09,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085598116] [2020-04-17 14:31:09,105 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 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 14:31:09,153 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 14:31:09,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:09,154 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:31:09,155 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:09,200 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 14:31:09,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:09,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 14:31:09,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126932440] [2020-04-17 14:31:09,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 14:31:09,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:09,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 14:31:09,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:31:09,202 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-04-17 14:31:09,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:09,421 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-04-17 14:31:09,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:31:09,421 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 14:31:09,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:09,422 INFO L225 Difference]: With dead ends: 68 [2020-04-17 14:31:09,422 INFO L226 Difference]: Without dead ends: 62 [2020-04-17 14:31:09,423 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:31:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-17 14:31:09,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-04-17 14:31:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 14:31:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 14:31:09,427 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-04-17 14:31:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:09,427 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 14:31:09,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 14:31:09,427 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 14:31:09,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:31:09,428 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:09,428 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:09,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:09,632 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:09,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:09,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-04-17 14:31:09,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:09,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080777680] [2020-04-17 14:31:09,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:09,704 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 14:31:09,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080777680] [2020-04-17 14:31:09,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894089315] [2020-04-17 14:31:09,704 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 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 14:31:09,749 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 14:31:09,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:09,750 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:31:09,752 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:09,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:09,775 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 14:31:09,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:09,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 14:31:09,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109029510] [2020-04-17 14:31:09,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:31:09,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:09,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:31:09,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:31:09,777 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-04-17 14:31:09,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:09,998 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-04-17 14:31:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:31:09,998 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 14:31:09,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:09,999 INFO L225 Difference]: With dead ends: 67 [2020-04-17 14:31:09,999 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 14:31:09,999 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:31:09,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 14:31:10,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-04-17 14:31:10,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 14:31:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 14:31:10,001 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-04-17 14:31:10,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:10,001 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 14:31:10,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:31:10,001 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 14:31:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:31:10,002 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:10,002 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:10,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:10,205 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:10,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:10,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-04-17 14:31:10,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:10,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534479193] [2020-04-17 14:31:10,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:10,264 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 14:31:10,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534479193] [2020-04-17 14:31:10,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438550585] [2020-04-17 14:31:10,265 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 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 14:31:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:10,314 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:31:10,315 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:10,333 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 14:31:10,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:10,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 14:31:10,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948703694] [2020-04-17 14:31:10,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 14:31:10,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:10,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 14:31:10,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 14:31:10,335 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-04-17 14:31:10,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:10,556 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-04-17 14:31:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:10,557 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 14:31:10,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:10,558 INFO L225 Difference]: With dead ends: 83 [2020-04-17 14:31:10,558 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 14:31:10,560 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:31:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 14:31:10,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-04-17 14:31:10,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 14:31:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-04-17 14:31:10,563 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-04-17 14:31:10,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:10,563 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-04-17 14:31:10,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 14:31:10,563 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-04-17 14:31:10,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:31:10,563 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:10,564 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:10,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:10,764 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:10,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-04-17 14:31:10,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:10,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826799112] [2020-04-17 14:31:10,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:10,849 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 14:31:10,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826799112] [2020-04-17 14:31:10,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408344959] [2020-04-17 14:31:10,850 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 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 14:31:10,901 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:10,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:10,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:10,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:10,928 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 14:31:10,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:10,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 14:31:10,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632141995] [2020-04-17 14:31:10,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:31:10,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:10,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:31:10,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:31:10,930 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-04-17 14:31:11,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:11,220 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-04-17 14:31:11,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:31:11,220 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 14:31:11,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:11,221 INFO L225 Difference]: With dead ends: 62 [2020-04-17 14:31:11,221 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 14:31:11,221 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:31:11,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 14:31:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-04-17 14:31:11,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-04-17 14:31:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-04-17 14:31:11,223 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-04-17 14:31:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:11,224 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-04-17 14:31:11,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:31:11,224 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-04-17 14:31:11,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 14:31:11,224 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:11,224 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:11,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:11,428 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:11,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:11,428 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-04-17 14:31:11,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:11,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877464945] [2020-04-17 14:31:11,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:11,487 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 14:31:11,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877464945] [2020-04-17 14:31:11,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274575669] [2020-04-17 14:31:11,488 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 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 14:31:11,532 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 14:31:11,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:11,534 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 14:31:11,535 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:11,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:11,581 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 14:31:11,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:11,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 14:31:11,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139546747] [2020-04-17 14:31:11,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:31:11,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:11,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:31:11,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:31:11,583 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-04-17 14:31:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:11,838 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-04-17 14:31:11,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:11,839 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 14:31:11,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:11,839 INFO L225 Difference]: With dead ends: 68 [2020-04-17 14:31:11,839 INFO L226 Difference]: Without dead ends: 63 [2020-04-17 14:31:11,840 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:31:11,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-17 14:31:11,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-04-17 14:31:11,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 14:31:11,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-04-17 14:31:11,844 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-04-17 14:31:11,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:11,844 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-04-17 14:31:11,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:31:11,844 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-04-17 14:31:11,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:11,845 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:11,845 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:12,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:12,049 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:12,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:12,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-04-17 14:31:12,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:12,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38362585] [2020-04-17 14:31:12,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:12,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38362585] [2020-04-17 14:31:12,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862956356] [2020-04-17 14:31:12,122 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 14:31:12,173 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:12,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:12,174 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:12,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:12,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:12,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:12,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 14:31:12,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248865157] [2020-04-17 14:31:12,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:12,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:12,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:12,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:12,225 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-04-17 14:31:12,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:12,527 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-04-17 14:31:12,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:12,528 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 14:31:12,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:12,528 INFO L225 Difference]: With dead ends: 60 [2020-04-17 14:31:12,529 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 14:31:12,529 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:31:12,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 14:31:12,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-04-17 14:31:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 14:31:12,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-04-17 14:31:12,533 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-04-17 14:31:12,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:12,533 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-04-17 14:31:12,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:12,533 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-04-17 14:31:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:12,534 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:12,534 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:12,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:12,737 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:12,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:12,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-04-17 14:31:12,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:12,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328430359] [2020-04-17 14:31:12,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:12,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:12,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328430359] [2020-04-17 14:31:12,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273334532] [2020-04-17 14:31:12,834 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 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 14:31:12,894 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 14:31:12,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:12,895 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:12,896 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:12,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:12,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 14:31:12,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774401031] [2020-04-17 14:31:12,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:31:12,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:12,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:31:12,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:31:12,909 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-04-17 14:31:13,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:13,084 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-04-17 14:31:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 14:31:13,084 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 14:31:13,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:13,085 INFO L225 Difference]: With dead ends: 66 [2020-04-17 14:31:13,085 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 14:31:13,086 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:31:13,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 14:31:13,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-04-17 14:31:13,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 14:31:13,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-04-17 14:31:13,089 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-04-17 14:31:13,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:13,089 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-04-17 14:31:13,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:31:13,090 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-04-17 14:31:13,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:13,090 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:13,090 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:13,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:13,294 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:13,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:13,294 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-04-17 14:31:13,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:13,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847995450] [2020-04-17 14:31:13,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:13,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847995450] [2020-04-17 14:31:13,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825287520] [2020-04-17 14:31:13,390 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 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 14:31:13,448 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 14:31:13,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:13,449 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:13,450 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:13,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:13,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:13,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 14:31:13,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421419062] [2020-04-17 14:31:13,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:13,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:13,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:13,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:13,510 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-04-17 14:31:13,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:13,728 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-04-17 14:31:13,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 14:31:13,729 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 14:31:13,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:13,730 INFO L225 Difference]: With dead ends: 74 [2020-04-17 14:31:13,730 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 14:31:13,730 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:31:13,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 14:31:13,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-04-17 14:31:13,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-17 14:31:13,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-04-17 14:31:13,734 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-04-17 14:31:13,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:13,734 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-04-17 14:31:13,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:13,734 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-04-17 14:31:13,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:13,735 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:13,735 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:13,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:13,936 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:13,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:13,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-04-17 14:31:13,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:13,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245752020] [2020-04-17 14:31:13,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:14,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245752020] [2020-04-17 14:31:14,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785811356] [2020-04-17 14:31:14,017 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 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 14:31:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:14,077 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:14,077 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:14,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:14,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 14:31:14,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985120201] [2020-04-17 14:31:14,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:31:14,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:14,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:31:14,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:31:14,091 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-04-17 14:31:14,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:14,417 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-04-17 14:31:14,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:14,417 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 14:31:14,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:14,418 INFO L225 Difference]: With dead ends: 75 [2020-04-17 14:31:14,418 INFO L226 Difference]: Without dead ends: 69 [2020-04-17 14:31:14,419 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:31:14,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-17 14:31:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-04-17 14:31:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 14:31:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 14:31:14,424 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-04-17 14:31:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:14,425 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 14:31:14,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:31:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 14:31:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:14,426 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:14,426 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:14,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:14,629 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:14,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:14,630 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-04-17 14:31:14,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:14,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268997649] [2020-04-17 14:31:14,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:14,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268997649] [2020-04-17 14:31:14,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209577898] [2020-04-17 14:31:14,714 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 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 14:31:14,759 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:14,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:14,760 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:14,761 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:14,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:14,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:14,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 14:31:14,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723770010] [2020-04-17 14:31:14,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:14,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:14,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:14,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:14,785 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-04-17 14:31:15,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:15,061 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-04-17 14:31:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:31:15,062 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 14:31:15,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:15,063 INFO L225 Difference]: With dead ends: 79 [2020-04-17 14:31:15,063 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 14:31:15,063 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:31:15,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 14:31:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-04-17 14:31:15,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 14:31:15,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 14:31:15,067 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-04-17 14:31:15,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:15,067 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 14:31:15,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:15,067 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 14:31:15,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:15,068 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:15,068 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:15,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:15,272 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:15,273 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-04-17 14:31:15,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:15,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632952019] [2020-04-17 14:31:15,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:15,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632952019] [2020-04-17 14:31:15,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270985419] [2020-04-17 14:31:15,388 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 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 14:31:15,461 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 14:31:15,462 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:15,463 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:15,464 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:15,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:15,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 14:31:15,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971933362] [2020-04-17 14:31:15,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:31:15,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:15,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:31:15,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:31:15,508 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-04-17 14:31:15,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:15,822 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-04-17 14:31:15,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:31:15,823 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 14:31:15,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:15,824 INFO L225 Difference]: With dead ends: 79 [2020-04-17 14:31:15,824 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 14:31:15,825 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:31:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 14:31:15,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-04-17 14:31:15,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-17 14:31:15,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-04-17 14:31:15,829 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-04-17 14:31:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:15,829 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-04-17 14:31:15,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:31:15,829 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-04-17 14:31:15,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:15,830 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:15,830 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:16,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:16,035 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:16,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:16,035 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-04-17 14:31:16,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:16,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349695542] [2020-04-17 14:31:16,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:16,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349695542] [2020-04-17 14:31:16,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193880156] [2020-04-17 14:31:16,144 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 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 14:31:16,191 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:16,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:16,192 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:16,193 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:16,209 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:16,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:16,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 14:31:16,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385511128] [2020-04-17 14:31:16,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:16,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:16,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:16,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:16,220 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-04-17 14:31:16,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:16,524 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-04-17 14:31:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:31:16,525 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 14:31:16,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:16,525 INFO L225 Difference]: With dead ends: 76 [2020-04-17 14:31:16,526 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 14:31:16,526 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:31:16,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 14:31:16,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-04-17 14:31:16,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 14:31:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-04-17 14:31:16,529 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-04-17 14:31:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:16,529 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-04-17 14:31:16,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-04-17 14:31:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:16,530 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:16,530 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:16,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:16,733 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:16,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:16,734 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-04-17 14:31:16,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:16,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466532786] [2020-04-17 14:31:16,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:16,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466532786] [2020-04-17 14:31:16,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194418593] [2020-04-17 14:31:16,813 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 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 14:31:16,858 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 14:31:16,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:16,859 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 14:31:16,860 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:16,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:16,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 14:31:16,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720592272] [2020-04-17 14:31:16,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 14:31:16,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:16,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 14:31:16,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 14:31:16,873 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-04-17 14:31:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:17,146 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-04-17 14:31:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:31:17,153 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 14:31:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:17,154 INFO L225 Difference]: With dead ends: 96 [2020-04-17 14:31:17,154 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 14:31:17,155 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:31:17,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 14:31:17,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-04-17 14:31:17,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 14:31:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-04-17 14:31:17,158 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-04-17 14:31:17,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:17,158 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-04-17 14:31:17,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 14:31:17,159 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-04-17 14:31:17,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 14:31:17,159 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:17,159 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:17,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:17,363 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:17,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:17,363 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-04-17 14:31:17,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:17,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029664040] [2020-04-17 14:31:17,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:17,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029664040] [2020-04-17 14:31:17,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047191988] [2020-04-17 14:31:17,471 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 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 14:31:17,547 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 14:31:17,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:17,548 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:17,549 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:17,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:17,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 14:31:17,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978607962] [2020-04-17 14:31:17,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:17,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:17,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:17,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:17,588 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-04-17 14:31:18,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:18,106 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-04-17 14:31:18,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:31:18,107 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 14:31:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:18,108 INFO L225 Difference]: With dead ends: 77 [2020-04-17 14:31:18,108 INFO L226 Difference]: Without dead ends: 69 [2020-04-17 14:31:18,109 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:31:18,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-17 14:31:18,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-04-17 14:31:18,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 14:31:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-04-17 14:31:18,113 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-04-17 14:31:18,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:18,113 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-04-17 14:31:18,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-04-17 14:31:18,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:18,114 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:18,114 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:18,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:18,315 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:18,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:18,316 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-04-17 14:31:18,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:18,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89996488] [2020-04-17 14:31:18,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:18,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89996488] [2020-04-17 14:31:18,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746353053] [2020-04-17 14:31:18,431 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 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 14:31:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:18,474 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:18,475 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:18,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:18,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 14:31:18,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502863653] [2020-04-17 14:31:18,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:18,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:18,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:18,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:18,484 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-04-17 14:31:18,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:18,665 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-04-17 14:31:18,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:31:18,665 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 14:31:18,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:18,666 INFO L225 Difference]: With dead ends: 84 [2020-04-17 14:31:18,667 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 14:31:18,667 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:31:18,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 14:31:18,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-04-17 14:31:18,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 14:31:18,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 14:31:18,671 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 14:31:18,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:18,672 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 14:31:18,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:18,672 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 14:31:18,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:18,673 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:18,673 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:18,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:18,878 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:18,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:18,882 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-04-17 14:31:18,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:18,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139693811] [2020-04-17 14:31:18,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:19,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139693811] [2020-04-17 14:31:19,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853076893] [2020-04-17 14:31:19,025 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 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 14:31:19,100 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:19,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:19,102 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:19,103 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:19,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:19,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:19,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 14:31:19,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479504492] [2020-04-17 14:31:19,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:19,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:19,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:19,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:19,182 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 14:31:19,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:19,620 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-04-17 14:31:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:31:19,620 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 14:31:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:19,622 INFO L225 Difference]: With dead ends: 81 [2020-04-17 14:31:19,622 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 14:31:19,622 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:31:19,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 14:31:19,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-04-17 14:31:19,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 14:31:19,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 14:31:19,626 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 14:31:19,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:19,627 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 14:31:19,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:19,627 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 14:31:19,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:19,628 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:19,628 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:19,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:19,832 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:19,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:19,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-04-17 14:31:19,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:19,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528943095] [2020-04-17 14:31:19,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:19,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528943095] [2020-04-17 14:31:19,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388749005] [2020-04-17 14:31:19,962 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 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 14:31:20,012 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 14:31:20,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:20,014 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:20,015 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:20,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:20,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 14:31:20,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535085986] [2020-04-17 14:31:20,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:20,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:20,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:20,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:20,030 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 14:31:20,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:20,246 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-04-17 14:31:20,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:20,247 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 14:31:20,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:20,248 INFO L225 Difference]: With dead ends: 78 [2020-04-17 14:31:20,248 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 14:31:20,249 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:31:20,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 14:31:20,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-04-17 14:31:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 14:31:20,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 14:31:20,253 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 14:31:20,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:20,253 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 14:31:20,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:20,253 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 14:31:20,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:20,254 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:20,254 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:20,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:20,457 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:20,458 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-04-17 14:31:20,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:20,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778207126] [2020-04-17 14:31:20,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:20,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778207126] [2020-04-17 14:31:20,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917670627] [2020-04-17 14:31:20,550 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 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 14:31:20,600 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:20,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:20,601 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:20,602 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:20,633 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:20,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:20,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 14:31:20,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611702855] [2020-04-17 14:31:20,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:20,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:20,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:20,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:20,649 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 14:31:20,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:20,957 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-04-17 14:31:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:31:20,958 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 14:31:20,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:20,959 INFO L225 Difference]: With dead ends: 77 [2020-04-17 14:31:20,959 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 14:31:20,960 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:31:20,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 14:31:20,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-04-17 14:31:20,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 14:31:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 14:31:20,964 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 14:31:20,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:20,964 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 14:31:20,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:20,964 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 14:31:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:20,965 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:20,965 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:21,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:21,168 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:21,169 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-04-17 14:31:21,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:21,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547928721] [2020-04-17 14:31:21,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:21,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:21,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547928721] [2020-04-17 14:31:21,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072537324] [2020-04-17 14:31:21,253 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 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 14:31:21,296 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 14:31:21,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:21,297 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:21,298 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:21,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:21,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 14:31:21,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713118153] [2020-04-17 14:31:21,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:21,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:21,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:21,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:21,316 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 14:31:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:21,583 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-04-17 14:31:21,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:31:21,584 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 14:31:21,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:21,585 INFO L225 Difference]: With dead ends: 74 [2020-04-17 14:31:21,585 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 14:31:21,585 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:31:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 14:31:21,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-04-17 14:31:21,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 14:31:21,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 14:31:21,588 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 14:31:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:21,589 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 14:31:21,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:21,589 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 14:31:21,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:21,589 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:21,589 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:21,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:21,793 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:21,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:21,794 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-04-17 14:31:21,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:21,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850989037] [2020-04-17 14:31:21,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:21,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:21,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850989037] [2020-04-17 14:31:21,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349715966] [2020-04-17 14:31:21,879 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 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 14:31:21,928 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 14:31:21,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:21,929 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:21,930 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:21,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:21,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:21,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 14:31:21,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932431256] [2020-04-17 14:31:21,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:21,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:21,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:21,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:21,962 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 14:31:22,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:22,302 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-04-17 14:31:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:31:22,303 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 14:31:22,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:22,303 INFO L225 Difference]: With dead ends: 73 [2020-04-17 14:31:22,303 INFO L226 Difference]: Without dead ends: 67 [2020-04-17 14:31:22,304 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-04-17 14:31:22,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-04-17 14:31:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-04-17 14:31:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 14:31:22,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 14:31:22,306 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 14:31:22,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:22,306 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 14:31:22,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 14:31:22,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:22,307 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:22,307 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:22,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:22,511 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:22,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:22,511 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-04-17 14:31:22,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:22,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291620074] [2020-04-17 14:31:22,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:22,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291620074] [2020-04-17 14:31:22,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691882341] [2020-04-17 14:31:22,582 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 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 14:31:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:22,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:22,633 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:22,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:22,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 14:31:22,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414937324] [2020-04-17 14:31:22,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 14:31:22,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:22,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 14:31:22,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 14:31:22,649 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 14:31:22,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:22,919 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-04-17 14:31:22,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:31:22,919 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 14:31:22,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:22,920 INFO L225 Difference]: With dead ends: 89 [2020-04-17 14:31:22,920 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 14:31:22,920 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:31:22,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 14:31:22,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-04-17 14:31:22,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 14:31:22,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-04-17 14:31:22,922 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-04-17 14:31:22,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:22,923 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-04-17 14:31:22,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 14:31:22,923 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-04-17 14:31:22,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:22,923 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:22,923 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:23,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:23,127 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:23,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:23,127 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-04-17 14:31:23,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:23,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111215285] [2020-04-17 14:31:23,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:23,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111215285] [2020-04-17 14:31:23,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363143577] [2020-04-17 14:31:23,215 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 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 14:31:23,263 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:23,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:23,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:23,264 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:23,282 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:23,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:23,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 14:31:23,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061538554] [2020-04-17 14:31:23,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:23,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:23,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:23,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:23,293 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-04-17 14:31:23,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:23,676 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-04-17 14:31:23,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:31:23,677 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 14:31:23,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:23,677 INFO L225 Difference]: With dead ends: 70 [2020-04-17 14:31:23,678 INFO L226 Difference]: Without dead ends: 62 [2020-04-17 14:31:23,678 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-04-17 14:31:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-17 14:31:23,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-04-17 14:31:23,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-17 14:31:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-04-17 14:31:23,683 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-04-17 14:31:23,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:23,684 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-04-17 14:31:23,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-04-17 14:31:23,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 14:31:23,684 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:23,684 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:23,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:23,888 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:23,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:23,888 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-04-17 14:31:23,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:23,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504413830] [2020-04-17 14:31:23,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:23,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504413830] [2020-04-17 14:31:23,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651964476] [2020-04-17 14:31:23,959 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 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 14:31:24,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 14:31:24,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:24,008 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 14:31:24,009 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:24,023 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:24,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:24,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 14:31:24,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861172453] [2020-04-17 14:31:24,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:24,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:24,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:24,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:24,033 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-04-17 14:31:24,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:24,409 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-04-17 14:31:24,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:31:24,410 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 14:31:24,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:24,411 INFO L225 Difference]: With dead ends: 76 [2020-04-17 14:31:24,411 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 14:31:24,412 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-04-17 14:31:24,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 14:31:24,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-04-17 14:31:24,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 14:31:24,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-04-17 14:31:24,415 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-04-17 14:31:24,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:24,415 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-04-17 14:31:24,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:24,415 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-04-17 14:31:24,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:24,416 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:24,416 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:24,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:24,620 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:24,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:24,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-04-17 14:31:24,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:24,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604085475] [2020-04-17 14:31:24,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:24,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604085475] [2020-04-17 14:31:24,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431712035] [2020-04-17 14:31:24,715 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 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 14:31:24,778 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:24,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:24,778 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:24,779 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:24,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:24,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:24,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 14:31:24,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157493288] [2020-04-17 14:31:24,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:24,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:24,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:24,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:24,805 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-04-17 14:31:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:25,194 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-04-17 14:31:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:31:25,195 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 14:31:25,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:25,196 INFO L225 Difference]: With dead ends: 66 [2020-04-17 14:31:25,196 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 14:31:25,197 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-04-17 14:31:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 14:31:25,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-04-17 14:31:25,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 14:31:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-04-17 14:31:25,200 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-04-17 14:31:25,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:25,200 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-04-17 14:31:25,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-04-17 14:31:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:25,201 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:25,201 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:25,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:25,405 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:25,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:25,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-04-17 14:31:25,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:25,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387282808] [2020-04-17 14:31:25,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:25,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387282808] [2020-04-17 14:31:25,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518850952] [2020-04-17 14:31:25,515 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 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 14:31:25,563 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 14:31:25,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:25,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:25,564 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:25,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:25,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 14:31:25,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662498089] [2020-04-17 14:31:25,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:25,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:25,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:25,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:25,572 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-04-17 14:31:25,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:25,739 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-04-17 14:31:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 14:31:25,740 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 14:31:25,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:25,740 INFO L225 Difference]: With dead ends: 72 [2020-04-17 14:31:25,741 INFO L226 Difference]: Without dead ends: 66 [2020-04-17 14:31:25,741 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:31:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-04-17 14:31:25,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-04-17 14:31:25,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 14:31:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-04-17 14:31:25,744 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-04-17 14:31:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:25,744 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-04-17 14:31:25,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-04-17 14:31:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:25,745 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:25,745 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:25,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:25,949 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:25,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:25,949 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-04-17 14:31:25,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:25,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584967697] [2020-04-17 14:31:25,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:26,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584967697] [2020-04-17 14:31:26,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194898912] [2020-04-17 14:31:26,074 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 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 14:31:26,153 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 14:31:26,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:26,154 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:26,156 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:26,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:26,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:26,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 14:31:26,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328441842] [2020-04-17 14:31:26,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:26,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:26,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:26,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:26,222 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-04-17 14:31:26,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:26,524 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-04-17 14:31:26,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 14:31:26,524 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 14:31:26,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:26,525 INFO L225 Difference]: With dead ends: 82 [2020-04-17 14:31:26,525 INFO L226 Difference]: Without dead ends: 76 [2020-04-17 14:31:26,526 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:31:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-04-17 14:31:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-04-17 14:31:26,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 14:31:26,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-04-17 14:31:26,528 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-04-17 14:31:26,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:26,528 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-04-17 14:31:26,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:26,529 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-04-17 14:31:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:26,529 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:26,529 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:26,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:26,733 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:26,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:26,733 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-04-17 14:31:26,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:26,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438918808] [2020-04-17 14:31:26,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:26,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438918808] [2020-04-17 14:31:26,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230946749] [2020-04-17 14:31:26,865 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 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 14:31:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:26,917 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:26,918 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:26,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:26,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 14:31:26,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859294109] [2020-04-17 14:31:26,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:26,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:26,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:26,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:26,927 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-04-17 14:31:27,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:27,169 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-04-17 14:31:27,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:31:27,169 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 14:31:27,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:27,170 INFO L225 Difference]: With dead ends: 83 [2020-04-17 14:31:27,170 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 14:31:27,171 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:31:27,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 14:31:27,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-04-17 14:31:27,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 14:31:27,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-04-17 14:31:27,172 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-04-17 14:31:27,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:27,173 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-04-17 14:31:27,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:27,173 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-04-17 14:31:27,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:27,173 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:27,173 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:27,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:27,374 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:27,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:27,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-04-17 14:31:27,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:27,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839783460] [2020-04-17 14:31:27,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:27,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:27,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839783460] [2020-04-17 14:31:27,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615513330] [2020-04-17 14:31:27,475 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 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 14:31:27,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:27,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:27,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:27,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:27,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:27,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:27,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:27,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 14:31:27,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433061313] [2020-04-17 14:31:27,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:27,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:27,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:27,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:27,576 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-04-17 14:31:27,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:27,855 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-04-17 14:31:27,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:31:27,861 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 14:31:27,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:27,861 INFO L225 Difference]: With dead ends: 89 [2020-04-17 14:31:27,862 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 14:31:27,862 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:31:27,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 14:31:27,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-04-17 14:31:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 14:31:27,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-04-17 14:31:27,864 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-04-17 14:31:27,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:27,865 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-04-17 14:31:27,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:27,865 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-04-17 14:31:27,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:27,865 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:27,865 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:28,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:28,069 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:28,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-04-17 14:31:28,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:28,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617873010] [2020-04-17 14:31:28,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:28,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617873010] [2020-04-17 14:31:28,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890233946] [2020-04-17 14:31:28,170 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 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 14:31:28,220 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 14:31:28,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:28,221 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:28,222 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:28,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:28,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 14:31:28,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221134226] [2020-04-17 14:31:28,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:28,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:28,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:28,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:28,243 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-04-17 14:31:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:28,536 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-04-17 14:31:28,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:31:28,537 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 14:31:28,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:28,538 INFO L225 Difference]: With dead ends: 89 [2020-04-17 14:31:28,538 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 14:31:28,538 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 14:31:28,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 14:31:28,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-04-17 14:31:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 14:31:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 14:31:28,541 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-04-17 14:31:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:28,542 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 14:31:28,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 14:31:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:28,542 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:28,542 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:28,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:28,746 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:28,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:28,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-04-17 14:31:28,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:28,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821332667] [2020-04-17 14:31:28,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:28,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821332667] [2020-04-17 14:31:28,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054116934] [2020-04-17 14:31:28,834 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 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 14:31:28,894 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:28,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:28,895 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:28,896 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:28,908 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:28,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:28,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 14:31:28,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873946714] [2020-04-17 14:31:28,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:28,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:28,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:28,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:28,917 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-04-17 14:31:29,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:29,272 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-04-17 14:31:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:31:29,273 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 14:31:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:29,274 INFO L225 Difference]: With dead ends: 86 [2020-04-17 14:31:29,274 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 14:31:29,275 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-04-17 14:31:29,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 14:31:29,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-04-17 14:31:29,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 14:31:29,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 14:31:29,278 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-04-17 14:31:29,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:29,278 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 14:31:29,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:29,278 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 14:31:29,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:29,278 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:29,279 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:29,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:29,482 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:29,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-04-17 14:31:29,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:29,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120269813] [2020-04-17 14:31:29,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:29,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120269813] [2020-04-17 14:31:29,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742305394] [2020-04-17 14:31:29,710 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 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 14:31:29,755 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 14:31:29,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:29,756 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:29,756 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:29,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:29,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 14:31:29,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053077017] [2020-04-17 14:31:29,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:29,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:29,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:29,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:29,773 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-04-17 14:31:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:30,082 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-04-17 14:31:30,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:31:30,083 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 14:31:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:30,083 INFO L225 Difference]: With dead ends: 87 [2020-04-17 14:31:30,083 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 14:31:30,084 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-04-17 14:31:30,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 14:31:30,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-04-17 14:31:30,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-04-17 14:31:30,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-04-17 14:31:30,086 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-04-17 14:31:30,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:30,087 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-04-17 14:31:30,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:30,087 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-04-17 14:31:30,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:30,088 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:30,088 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:30,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:30,289 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:30,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:30,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-04-17 14:31:30,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:30,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722753957] [2020-04-17 14:31:30,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:30,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722753957] [2020-04-17 14:31:30,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415353398] [2020-04-17 14:31:30,378 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 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 14:31:30,422 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 14:31:30,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:30,423 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:30,424 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:30,438 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:30,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:30,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 14:31:30,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068664480] [2020-04-17 14:31:30,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:30,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:30,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:30,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:30,449 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-04-17 14:31:30,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:30,850 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-04-17 14:31:30,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:31:30,850 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 14:31:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:30,851 INFO L225 Difference]: With dead ends: 84 [2020-04-17 14:31:30,852 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 14:31:30,852 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-04-17 14:31:30,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 14:31:30,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-04-17 14:31:30,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 14:31:30,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-04-17 14:31:30,855 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-04-17 14:31:30,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:30,855 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-04-17 14:31:30,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:30,856 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-04-17 14:31:30,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:30,856 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:30,856 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:31,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:31,060 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:31,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:31,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-04-17 14:31:31,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:31,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725571664] [2020-04-17 14:31:31,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:31,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725571664] [2020-04-17 14:31:31,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240237144] [2020-04-17 14:31:31,156 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 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 14:31:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:31,211 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:31,212 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:31,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:31,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 14:31:31,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672312589] [2020-04-17 14:31:31,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 14:31:31,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:31,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 14:31:31,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 14:31:31,248 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-04-17 14:31:31,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:31,623 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-04-17 14:31:31,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:31:31,624 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 14:31:31,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:31,625 INFO L225 Difference]: With dead ends: 104 [2020-04-17 14:31:31,625 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 14:31:31,625 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-04-17 14:31:31,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 14:31:31,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-04-17 14:31:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 14:31:31,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-04-17 14:31:31,628 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-04-17 14:31:31,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:31,629 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-04-17 14:31:31,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 14:31:31,629 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-04-17 14:31:31,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 14:31:31,630 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:31,630 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:31,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:31,834 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:31,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-04-17 14:31:31,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:31,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810434985] [2020-04-17 14:31:31,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:31,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810434985] [2020-04-17 14:31:31,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283045665] [2020-04-17 14:31:31,933 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 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 14:31:31,977 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:31,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:31,978 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 14:31:31,979 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:32,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:32,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:32,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 14:31:32,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967040254] [2020-04-17 14:31:32,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:32,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:32,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:32,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:32,020 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-04-17 14:31:32,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:32,495 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-04-17 14:31:32,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:31:32,496 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 14:31:32,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:32,496 INFO L225 Difference]: With dead ends: 85 [2020-04-17 14:31:32,496 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 14:31:32,497 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 14:31:32,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 14:31:32,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-04-17 14:31:32,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 14:31:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-04-17 14:31:32,499 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-04-17 14:31:32,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:32,500 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-04-17 14:31:32,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:32,500 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-04-17 14:31:32,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:32,500 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:32,500 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:32,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:32,704 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:32,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-04-17 14:31:32,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:32,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224642405] [2020-04-17 14:31:32,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:32,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224642405] [2020-04-17 14:31:32,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004243668] [2020-04-17 14:31:32,883 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 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 14:31:32,935 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 14:31:32,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:32,936 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:32,937 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:32,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:32,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 14:31:32,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814908190] [2020-04-17 14:31:32,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:32,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:32,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:32,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:32,947 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-04-17 14:31:33,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:33,143 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-04-17 14:31:33,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:33,143 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 14:31:33,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:33,146 INFO L225 Difference]: With dead ends: 94 [2020-04-17 14:31:33,147 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 14:31:33,147 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:31:33,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 14:31:33,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-04-17 14:31:33,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 14:31:33,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 14:31:33,150 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 14:31:33,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:33,151 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 14:31:33,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:33,151 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 14:31:33,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:33,151 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:33,152 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:33,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:33,355 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:33,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:33,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-04-17 14:31:33,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:33,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472197604] [2020-04-17 14:31:33,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:33,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472197604] [2020-04-17 14:31:33,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89539485] [2020-04-17 14:31:33,485 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 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 14:31:33,528 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:33,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:33,530 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:33,531 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:33,542 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:33,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:33,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 14:31:33,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178999099] [2020-04-17 14:31:33,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:33,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:33,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:33,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:33,552 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 14:31:33,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:33,841 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-04-17 14:31:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:31:33,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 14:31:33,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:33,842 INFO L225 Difference]: With dead ends: 91 [2020-04-17 14:31:33,842 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 14:31:33,843 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-04-17 14:31:33,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 14:31:33,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-04-17 14:31:33,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 14:31:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 14:31:33,845 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 14:31:33,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:33,845 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 14:31:33,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:33,846 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 14:31:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:33,846 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:33,846 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:34,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:34,050 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:34,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:34,050 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-04-17 14:31:34,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:34,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098043356] [2020-04-17 14:31:34,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:34,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098043356] [2020-04-17 14:31:34,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871284929] [2020-04-17 14:31:34,156 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 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 14:31:34,203 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 14:31:34,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:34,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:34,205 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:34,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:34,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 14:31:34,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259892446] [2020-04-17 14:31:34,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:34,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:34,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:34,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:34,223 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 14:31:34,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:34,490 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-04-17 14:31:34,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:31:34,490 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 14:31:34,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:34,491 INFO L225 Difference]: With dead ends: 88 [2020-04-17 14:31:34,492 INFO L226 Difference]: Without dead ends: 82 [2020-04-17 14:31:34,492 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:31:34,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-04-17 14:31:34,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-04-17 14:31:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 14:31:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 14:31:34,495 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 14:31:34,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:34,496 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 14:31:34,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:34,496 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 14:31:34,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:34,497 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:34,497 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:34,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:34,698 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:34,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:34,698 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-04-17 14:31:34,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:34,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066606859] [2020-04-17 14:31:34,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:34,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066606859] [2020-04-17 14:31:34,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678125955] [2020-04-17 14:31:34,846 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 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 14:31:34,891 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 14:31:34,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:34,892 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:34,893 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:34,906 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:34,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:34,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 14:31:34,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313177741] [2020-04-17 14:31:34,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:34,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:34,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:34,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:34,915 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 14:31:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:35,262 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-04-17 14:31:35,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:31:35,263 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 14:31:35,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:35,264 INFO L225 Difference]: With dead ends: 87 [2020-04-17 14:31:35,264 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 14:31:35,265 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-04-17 14:31:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 14:31:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-04-17 14:31:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 14:31:35,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 14:31:35,266 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 14:31:35,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:35,267 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 14:31:35,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:35,267 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 14:31:35,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:35,267 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:35,267 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:35,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:35,469 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:35,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:35,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-04-17 14:31:35,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:35,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971442515] [2020-04-17 14:31:35,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:35,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971442515] [2020-04-17 14:31:35,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142567399] [2020-04-17 14:31:35,574 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 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 14:31:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:35,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:35,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:35,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:35,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 14:31:35,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89665492] [2020-04-17 14:31:35,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:35,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:35,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:35,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:35,635 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 14:31:35,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:35,933 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-04-17 14:31:35,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:31:35,934 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 14:31:35,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:35,935 INFO L225 Difference]: With dead ends: 84 [2020-04-17 14:31:35,935 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 14:31:35,936 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-04-17 14:31:35,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 14:31:35,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-04-17 14:31:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 14:31:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 14:31:35,939 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 14:31:35,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:35,939 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 14:31:35,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 14:31:35,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:35,940 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:35,940 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:36,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:36,144 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:36,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:36,144 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-04-17 14:31:36,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:36,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495582779] [2020-04-17 14:31:36,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:36,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495582779] [2020-04-17 14:31:36,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941949356] [2020-04-17 14:31:36,266 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 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 14:31:36,316 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:36,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:36,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:36,318 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:36,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:36,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:36,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 14:31:36,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717597095] [2020-04-17 14:31:36,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:36,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:36,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:36,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:36,347 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 14:31:36,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:36,742 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-04-17 14:31:36,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:31:36,743 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 14:31:36,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:36,744 INFO L225 Difference]: With dead ends: 83 [2020-04-17 14:31:36,744 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 14:31:36,745 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-04-17 14:31:36,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 14:31:36,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-04-17 14:31:36,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 14:31:36,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 14:31:36,748 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 14:31:36,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:36,748 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 14:31:36,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:36,749 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 14:31:36,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:36,749 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:36,749 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:36,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:36,953 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:36,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:36,953 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-04-17 14:31:36,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:36,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809390866] [2020-04-17 14:31:36,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:37,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809390866] [2020-04-17 14:31:37,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745563707] [2020-04-17 14:31:37,043 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 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 14:31:37,092 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 14:31:37,093 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:37,094 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:37,095 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:37,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:37,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 14:31:37,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598183853] [2020-04-17 14:31:37,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:37,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:37,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:37,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:37,105 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 14:31:37,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:37,451 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-04-17 14:31:37,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:31:37,452 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 14:31:37,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:37,453 INFO L225 Difference]: With dead ends: 80 [2020-04-17 14:31:37,453 INFO L226 Difference]: Without dead ends: 74 [2020-04-17 14:31:37,453 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-04-17 14:31:37,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-04-17 14:31:37,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-04-17 14:31:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 14:31:37,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 14:31:37,456 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 14:31:37,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:37,456 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 14:31:37,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 14:31:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:37,457 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:37,457 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:37,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:37,659 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:37,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:37,659 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-04-17 14:31:37,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:37,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249715614] [2020-04-17 14:31:37,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:37,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249715614] [2020-04-17 14:31:37,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400869649] [2020-04-17 14:31:37,761 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 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 14:31:37,806 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:37,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:37,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:37,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:37,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:37,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:37,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 14:31:37,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653503407] [2020-04-17 14:31:37,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:37,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:37,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:37,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:37,832 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 14:31:38,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:38,310 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-04-17 14:31:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:31:38,310 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 14:31:38,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:38,311 INFO L225 Difference]: With dead ends: 79 [2020-04-17 14:31:38,311 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 14:31:38,312 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 14:31:38,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 14:31:38,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-04-17 14:31:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 14:31:38,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 14:31:38,314 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 14:31:38,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:38,315 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 14:31:38,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:38,315 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 14:31:38,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:38,315 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:38,315 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:38,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:38,516 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:38,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:38,517 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-04-17 14:31:38,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:38,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828753874] [2020-04-17 14:31:38,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:38,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828753874] [2020-04-17 14:31:38,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787490857] [2020-04-17 14:31:38,602 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 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 14:31:38,649 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 14:31:38,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:38,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:38,651 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:38,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:38,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 14:31:38,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275208633] [2020-04-17 14:31:38,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 14:31:38,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:38,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 14:31:38,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 14:31:38,667 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 14:31:39,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:39,043 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-04-17 14:31:39,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:31:39,044 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 14:31:39,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:39,045 INFO L225 Difference]: With dead ends: 95 [2020-04-17 14:31:39,045 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 14:31:39,046 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 14:31:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 14:31:39,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-04-17 14:31:39,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 14:31:39,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-04-17 14:31:39,049 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-04-17 14:31:39,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:39,050 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-04-17 14:31:39,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 14:31:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-04-17 14:31:39,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:39,050 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:39,050 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:39,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:39,254 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:39,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:39,255 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-04-17 14:31:39,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:39,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105291014] [2020-04-17 14:31:39,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:39,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105291014] [2020-04-17 14:31:39,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31875029] [2020-04-17 14:31:39,335 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 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 14:31:39,384 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 14:31:39,384 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:39,385 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:39,386 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:39,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:39,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 14:31:39,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504059574] [2020-04-17 14:31:39,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:39,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:39,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:39,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:39,409 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-04-17 14:31:39,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:39,865 INFO L93 Difference]: Finished difference Result 74 states and 181 transitions. [2020-04-17 14:31:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:31:39,865 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 14:31:39,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:39,866 INFO L225 Difference]: With dead ends: 74 [2020-04-17 14:31:39,866 INFO L226 Difference]: Without dead ends: 66 [2020-04-17 14:31:39,867 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 14:31:39,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-04-17 14:31:39,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2020-04-17 14:31:39,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-17 14:31:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-04-17 14:31:39,869 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-04-17 14:31:39,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:39,870 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-04-17 14:31:39,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:39,870 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-04-17 14:31:39,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 14:31:39,871 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:39,871 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:40,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:40,072 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:40,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:40,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-04-17 14:31:40,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:40,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751019603] [2020-04-17 14:31:40,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:40,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751019603] [2020-04-17 14:31:40,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287947735] [2020-04-17 14:31:40,194 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 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 14:31:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:40,247 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 14:31:40,248 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:40,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:40,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:40,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 14:31:40,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715568913] [2020-04-17 14:31:40,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:40,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:40,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:40,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:40,273 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-04-17 14:31:40,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:40,745 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-04-17 14:31:40,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:31:40,745 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 14:31:40,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:40,746 INFO L225 Difference]: With dead ends: 84 [2020-04-17 14:31:40,746 INFO L226 Difference]: Without dead ends: 79 [2020-04-17 14:31:40,746 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 14:31:40,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-17 14:31:40,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-04-17 14:31:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 14:31:40,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-04-17 14:31:40,749 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-04-17 14:31:40,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:40,749 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-04-17 14:31:40,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:40,749 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-04-17 14:31:40,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:40,750 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:40,750 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:40,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:40,953 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:40,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:40,954 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-04-17 14:31:40,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:40,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526402395] [2020-04-17 14:31:40,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:41,069 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:41,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526402395] [2020-04-17 14:31:41,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493928857] [2020-04-17 14:31:41,069 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 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 14:31:41,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:41,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:41,150 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:41,151 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:41,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:41,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:41,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 14:31:41,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722824380] [2020-04-17 14:31:41,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:41,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:41,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:41,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:41,209 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-04-17 14:31:41,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:41,792 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-04-17 14:31:41,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:31:41,792 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 14:31:41,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:41,793 INFO L225 Difference]: With dead ends: 72 [2020-04-17 14:31:41,793 INFO L226 Difference]: Without dead ends: 67 [2020-04-17 14:31:41,794 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 14:31:41,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-04-17 14:31:41,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-04-17 14:31:41,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 14:31:41,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-04-17 14:31:41,796 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-04-17 14:31:41,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:41,796 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-04-17 14:31:41,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:41,796 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-04-17 14:31:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:41,797 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:41,797 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:41,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:41,997 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:41,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:41,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-04-17 14:31:41,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:41,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140146175] [2020-04-17 14:31:41,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:42,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140146175] [2020-04-17 14:31:42,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150245529] [2020-04-17 14:31:42,131 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 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 14:31:42,179 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 14:31:42,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:42,180 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:42,181 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:42,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:42,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:42,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 14:31:42,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563572799] [2020-04-17 14:31:42,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:42,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:42,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:42,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:42,190 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-04-17 14:31:42,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:42,409 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-04-17 14:31:42,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 14:31:42,409 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 14:31:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:42,410 INFO L225 Difference]: With dead ends: 78 [2020-04-17 14:31:42,410 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 14:31:42,411 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:31:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 14:31:42,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-04-17 14:31:42,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 14:31:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-04-17 14:31:42,413 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-04-17 14:31:42,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:42,414 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-04-17 14:31:42,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:42,414 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-04-17 14:31:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:42,414 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:42,415 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:42,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:42,618 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:42,618 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-04-17 14:31:42,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:42,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789393988] [2020-04-17 14:31:42,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:42,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789393988] [2020-04-17 14:31:42,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207519910] [2020-04-17 14:31:42,782 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 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 14:31:42,835 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:42,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:42,836 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:42,837 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:42,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:42,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:42,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 14:31:42,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739304089] [2020-04-17 14:31:42,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:42,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:42,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:42,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:42,860 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-04-17 14:31:43,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:43,113 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-04-17 14:31:43,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 14:31:43,114 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 14:31:43,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:43,115 INFO L225 Difference]: With dead ends: 90 [2020-04-17 14:31:43,115 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 14:31:43,115 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-04-17 14:31:43,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 14:31:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-04-17 14:31:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 14:31:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-04-17 14:31:43,118 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-04-17 14:31:43,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:43,119 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-04-17 14:31:43,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:43,119 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-04-17 14:31:43,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:43,119 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:43,119 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:43,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:43,323 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:43,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:43,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-04-17 14:31:43,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:43,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616795839] [2020-04-17 14:31:43,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:43,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616795839] [2020-04-17 14:31:43,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247931620] [2020-04-17 14:31:43,439 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 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 14:31:43,488 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 14:31:43,489 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:43,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:43,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:43,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:43,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 14:31:43,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803743155] [2020-04-17 14:31:43,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:43,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:43,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:43,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:43,498 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-04-17 14:31:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:43,789 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-04-17 14:31:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:31:43,789 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 14:31:43,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:43,790 INFO L225 Difference]: With dead ends: 91 [2020-04-17 14:31:43,790 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 14:31:43,791 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-04-17 14:31:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 14:31:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-04-17 14:31:43,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-04-17 14:31:43,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-04-17 14:31:43,795 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-04-17 14:31:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:43,795 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-04-17 14:31:43,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-04-17 14:31:43,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:43,796 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:43,796 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:43,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:43,999 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:44,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:44,000 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-04-17 14:31:44,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:44,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855221161] [2020-04-17 14:31:44,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:44,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855221161] [2020-04-17 14:31:44,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134207905] [2020-04-17 14:31:44,132 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 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 14:31:44,199 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 14:31:44,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:44,201 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:44,202 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:44,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:44,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:44,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 14:31:44,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628939411] [2020-04-17 14:31:44,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:44,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:44,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:44,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:44,260 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-04-17 14:31:44,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:44,585 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-04-17 14:31:44,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:31:44,585 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 14:31:44,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:44,586 INFO L225 Difference]: With dead ends: 99 [2020-04-17 14:31:44,586 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 14:31:44,587 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-04-17 14:31:44,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 14:31:44,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-04-17 14:31:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 14:31:44,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-04-17 14:31:44,589 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-04-17 14:31:44,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:44,590 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-04-17 14:31:44,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:44,590 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-04-17 14:31:44,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:44,590 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:44,590 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:44,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:44,791 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:44,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:44,792 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-04-17 14:31:44,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:44,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851156841] [2020-04-17 14:31:44,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:44,914 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:44,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851156841] [2020-04-17 14:31:44,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952570300] [2020-04-17 14:31:44,915 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 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 14:31:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:44,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:44,961 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:44,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:44,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 14:31:44,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214489314] [2020-04-17 14:31:44,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:44,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:44,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:44,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:44,970 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-04-17 14:31:45,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:45,275 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-04-17 14:31:45,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:31:45,276 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 14:31:45,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:45,277 INFO L225 Difference]: With dead ends: 99 [2020-04-17 14:31:45,277 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 14:31:45,277 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-04-17 14:31:45,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 14:31:45,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-04-17 14:31:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 14:31:45,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-04-17 14:31:45,280 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-04-17 14:31:45,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:45,280 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-04-17 14:31:45,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:45,281 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-04-17 14:31:45,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:45,281 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:45,281 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:45,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:45,484 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:45,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:45,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-04-17 14:31:45,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:45,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689226447] [2020-04-17 14:31:45,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:45,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689226447] [2020-04-17 14:31:45,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136157111] [2020-04-17 14:31:45,590 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 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 14:31:45,634 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:45,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:45,635 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:45,636 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:45,650 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:45,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:45,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 14:31:45,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564574656] [2020-04-17 14:31:45,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:45,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:45,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:45,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:45,658 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-04-17 14:31:46,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:46,065 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-04-17 14:31:46,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:31:46,066 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 14:31:46,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:46,067 INFO L225 Difference]: With dead ends: 96 [2020-04-17 14:31:46,067 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 14:31:46,067 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 14:31:46,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 14:31:46,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-04-17 14:31:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 14:31:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-04-17 14:31:46,070 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-04-17 14:31:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:46,070 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-04-17 14:31:46,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-04-17 14:31:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:46,071 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:46,071 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:46,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:46,272 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:46,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:46,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-04-17 14:31:46,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:46,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548255609] [2020-04-17 14:31:46,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:46,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548255609] [2020-04-17 14:31:46,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7120526] [2020-04-17 14:31:46,407 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 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 14:31:46,456 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 14:31:46,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:46,457 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:46,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:46,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:46,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 14:31:46,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527505933] [2020-04-17 14:31:46,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:46,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:46,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:46,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:46,469 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-04-17 14:31:46,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:46,842 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-04-17 14:31:46,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:31:46,842 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 14:31:46,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:46,843 INFO L225 Difference]: With dead ends: 97 [2020-04-17 14:31:46,844 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 14:31:46,844 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 14:31:46,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 14:31:46,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-04-17 14:31:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 14:31:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 14:31:46,847 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-04-17 14:31:46,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:46,847 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 14:31:46,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:46,847 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 14:31:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:46,847 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:46,847 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:47,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:47,048 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:47,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-04-17 14:31:47,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:47,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212624784] [2020-04-17 14:31:47,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:47,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212624784] [2020-04-17 14:31:47,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397265480] [2020-04-17 14:31:47,158 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 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 14:31:47,202 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:47,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:47,204 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:47,204 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:47,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:47,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:47,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 14:31:47,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773831323] [2020-04-17 14:31:47,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:47,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:47,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:47,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:47,226 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-04-17 14:31:47,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:47,704 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-04-17 14:31:47,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:31:47,705 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 14:31:47,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:47,706 INFO L225 Difference]: With dead ends: 94 [2020-04-17 14:31:47,706 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 14:31:47,706 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 14:31:47,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 14:31:47,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-04-17 14:31:47,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 14:31:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 14:31:47,710 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-04-17 14:31:47,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:47,710 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 14:31:47,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:47,711 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 14:31:47,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:47,711 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:47,711 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:47,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:47,914 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:47,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:47,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-04-17 14:31:47,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:47,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648784244] [2020-04-17 14:31:47,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:47,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:48,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648784244] [2020-04-17 14:31:48,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716268746] [2020-04-17 14:31:48,014 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 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 14:31:48,067 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 14:31:48,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:48,068 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:48,069 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:48,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:48,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 14:31:48,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123784250] [2020-04-17 14:31:48,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:48,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:48,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:48,088 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-04-17 14:31:48,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:48,600 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-04-17 14:31:48,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:31:48,600 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 14:31:48,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:48,601 INFO L225 Difference]: With dead ends: 95 [2020-04-17 14:31:48,601 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 14:31:48,602 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 14:31:48,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 14:31:48,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-04-17 14:31:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-17 14:31:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-04-17 14:31:48,605 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-04-17 14:31:48,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:48,606 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-04-17 14:31:48,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-04-17 14:31:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:48,607 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:48,607 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:48,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:48,808 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:48,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:48,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-04-17 14:31:48,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:48,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719892132] [2020-04-17 14:31:48,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:48,972 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:48,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719892132] [2020-04-17 14:31:48,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464216187] [2020-04-17 14:31:48,975 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 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 14:31:49,053 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 14:31:49,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:49,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:31:49,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:49,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:49,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 14:31:49,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269987780] [2020-04-17 14:31:49,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:49,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:49,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:49,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:49,107 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-04-17 14:31:49,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:49,660 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-04-17 14:31:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:31:49,660 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 14:31:49,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:49,661 INFO L225 Difference]: With dead ends: 92 [2020-04-17 14:31:49,661 INFO L226 Difference]: Without dead ends: 86 [2020-04-17 14:31:49,662 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=371, Invalid=961, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 14:31:49,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-04-17 14:31:49,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-04-17 14:31:49,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 14:31:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-04-17 14:31:49,664 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-04-17 14:31:49,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:49,665 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-04-17 14:31:49,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:49,665 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-04-17 14:31:49,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:49,665 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:49,665 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:49,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:49,870 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:49,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:49,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-04-17 14:31:49,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:49,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367807208] [2020-04-17 14:31:49,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:49,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367807208] [2020-04-17 14:31:49,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632271308] [2020-04-17 14:31:49,961 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 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 14:31:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:50,007 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:50,007 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:50,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:50,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 14:31:50,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292281588] [2020-04-17 14:31:50,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 14:31:50,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:50,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 14:31:50,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 14:31:50,022 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-04-17 14:31:50,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:50,471 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-04-17 14:31:50,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:31:50,471 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 14:31:50,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:50,472 INFO L225 Difference]: With dead ends: 112 [2020-04-17 14:31:50,472 INFO L226 Difference]: Without dead ends: 106 [2020-04-17 14:31:50,473 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 14:31:50,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-04-17 14:31:50,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-04-17 14:31:50,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 14:31:50,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-04-17 14:31:50,474 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-04-17 14:31:50,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:50,475 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-04-17 14:31:50,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 14:31:50,475 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-04-17 14:31:50,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 14:31:50,475 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:50,475 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:50,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:50,677 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:50,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:50,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-04-17 14:31:50,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:50,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911378293] [2020-04-17 14:31:50,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:50,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911378293] [2020-04-17 14:31:50,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141062660] [2020-04-17 14:31:50,787 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 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 14:31:50,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:50,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:50,833 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 14:31:50,834 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:50,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:50,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:50,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 14:31:50,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810744135] [2020-04-17 14:31:50,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:50,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:50,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:50,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:50,865 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-04-17 14:31:51,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:51,425 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-04-17 14:31:51,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:31:51,425 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 14:31:51,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:51,426 INFO L225 Difference]: With dead ends: 93 [2020-04-17 14:31:51,426 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 14:31:51,427 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 14:31:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 14:31:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-04-17 14:31:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-17 14:31:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-04-17 14:31:51,429 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-04-17 14:31:51,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:51,430 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-04-17 14:31:51,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-04-17 14:31:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:51,430 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:51,430 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:51,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:51,631 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:51,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:51,632 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-04-17 14:31:51,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:51,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876526364] [2020-04-17 14:31:51,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:51,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876526364] [2020-04-17 14:31:51,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134694228] [2020-04-17 14:31:51,783 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 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 14:31:51,837 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 14:31:51,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:51,838 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:51,838 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:51,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:51,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 14:31:51,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76448745] [2020-04-17 14:31:51,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:51,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:51,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:51,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:51,846 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-04-17 14:31:52,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:52,117 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-04-17 14:31:52,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:31:52,117 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 14:31:52,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:52,118 INFO L225 Difference]: With dead ends: 104 [2020-04-17 14:31:52,118 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 14:31:52,119 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-04-17 14:31:52,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 14:31:52,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-04-17 14:31:52,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 14:31:52,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 14:31:52,122 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 14:31:52,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:52,122 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 14:31:52,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:52,123 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 14:31:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:52,123 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:52,123 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:52,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:52,327 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:52,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:52,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-04-17 14:31:52,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:52,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26896883] [2020-04-17 14:31:52,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:52,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26896883] [2020-04-17 14:31:52,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961256770] [2020-04-17 14:31:52,462 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 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 14:31:52,510 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:52,510 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:52,511 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:52,512 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:52,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:52,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:52,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 14:31:52,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868502800] [2020-04-17 14:31:52,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:31:52,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:52,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:31:52,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:31:52,540 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 14:31:52,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:52,877 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-04-17 14:31:52,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:31:52,878 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 14:31:52,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:52,879 INFO L225 Difference]: With dead ends: 101 [2020-04-17 14:31:52,879 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 14:31:52,880 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-04-17 14:31:52,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 14:31:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-04-17 14:31:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 14:31:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 14:31:52,882 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 14:31:52,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:52,882 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 14:31:52,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:31:52,882 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 14:31:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:52,883 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:52,883 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:53,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:53,084 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:53,084 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-04-17 14:31:53,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:53,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083163575] [2020-04-17 14:31:53,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:53,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083163575] [2020-04-17 14:31:53,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089072325] [2020-04-17 14:31:53,205 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 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 14:31:53,254 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 14:31:53,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:53,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:53,256 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:53,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:53,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 14:31:53,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234376094] [2020-04-17 14:31:53,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:53,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:53,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:53,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:53,266 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 14:31:53,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:53,562 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-04-17 14:31:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:31:53,563 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 14:31:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:53,564 INFO L225 Difference]: With dead ends: 98 [2020-04-17 14:31:53,564 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 14:31:53,564 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-04-17 14:31:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 14:31:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-04-17 14:31:53,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 14:31:53,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 14:31:53,567 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 14:31:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:53,567 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 14:31:53,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 14:31:53,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:53,568 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:53,568 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:53,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:53,769 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:53,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:53,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-04-17 14:31:53,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:53,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978925443] [2020-04-17 14:31:53,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:53,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978925443] [2020-04-17 14:31:53,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786513568] [2020-04-17 14:31:53,900 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 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 14:31:53,952 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 14:31:53,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:53,953 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:53,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:53,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:53,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:53,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 14:31:53,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269413029] [2020-04-17 14:31:53,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:31:53,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:53,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:31:53,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:31:53,978 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 14:31:54,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:54,392 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-04-17 14:31:54,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:31:54,392 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 14:31:54,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:54,392 INFO L225 Difference]: With dead ends: 97 [2020-04-17 14:31:54,393 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 14:31:54,393 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 14:31:54,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 14:31:54,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-04-17 14:31:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 14:31:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 14:31:54,395 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 14:31:54,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:54,395 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 14:31:54,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:31:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 14:31:54,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:54,396 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:54,396 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:54,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:54,599 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:54,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-04-17 14:31:54,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:54,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441865564] [2020-04-17 14:31:54,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:54,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441865564] [2020-04-17 14:31:54,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864134387] [2020-04-17 14:31:54,715 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 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 14:31:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:54,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:54,761 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:54,769 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:54,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:54,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 14:31:54,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897814588] [2020-04-17 14:31:54,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:54,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:54,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:54,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:54,771 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 14:31:55,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:55,124 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-04-17 14:31:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:31:55,125 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 14:31:55,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:55,126 INFO L225 Difference]: With dead ends: 94 [2020-04-17 14:31:55,126 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 14:31:55,126 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 14:31:55,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 14:31:55,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-04-17 14:31:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 14:31:55,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 14:31:55,129 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 14:31:55,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:55,130 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 14:31:55,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:55,130 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 14:31:55,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:55,130 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:55,130 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:55,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:55,334 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:55,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:55,334 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-04-17 14:31:55,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:55,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399084835] [2020-04-17 14:31:55,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:55,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399084835] [2020-04-17 14:31:55,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871670203] [2020-04-17 14:31:55,473 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 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 14:31:55,520 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:31:55,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:55,521 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:55,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:55,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:55,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:55,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 14:31:55,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458800861] [2020-04-17 14:31:55,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:31:55,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:31:55,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:31:55,551 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 14:31:56,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:56,020 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-04-17 14:31:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:31:56,020 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 14:31:56,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:56,021 INFO L225 Difference]: With dead ends: 93 [2020-04-17 14:31:56,022 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 14:31:56,022 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 14:31:56,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 14:31:56,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-04-17 14:31:56,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 14:31:56,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 14:31:56,025 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 14:31:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:56,025 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 14:31:56,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:31:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 14:31:56,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:56,026 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:56,026 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:56,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:56,227 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:56,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:56,227 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-04-17 14:31:56,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:56,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001569029] [2020-04-17 14:31:56,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:56,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001569029] [2020-04-17 14:31:56,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266902732] [2020-04-17 14:31:56,357 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 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 14:31:56,406 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 14:31:56,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:56,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:31:56,409 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:56,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:56,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 14:31:56,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159772643] [2020-04-17 14:31:56,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:56,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:56,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:56,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:56,426 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 14:31:56,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:56,811 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-04-17 14:31:56,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:31:56,811 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 14:31:56,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:56,812 INFO L225 Difference]: With dead ends: 90 [2020-04-17 14:31:56,812 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 14:31:56,813 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 14:31:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 14:31:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-04-17 14:31:56,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 14:31:56,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 14:31:56,815 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 14:31:56,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:56,816 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 14:31:56,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:56,816 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 14:31:56,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:56,816 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:56,816 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:57,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:57,017 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:57,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:57,018 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-04-17 14:31:57,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:57,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125226737] [2020-04-17 14:31:57,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:57,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125226737] [2020-04-17 14:31:57,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562135606] [2020-04-17 14:31:57,127 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 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 14:31:57,175 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:31:57,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:57,177 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:57,177 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:57,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:31:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:57,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:57,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 14:31:57,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723501386] [2020-04-17 14:31:57,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:31:57,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:57,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:31:57,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:31:57,201 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 14:31:57,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:57,742 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-04-17 14:31:57,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:31:57,743 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 14:31:57,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:57,744 INFO L225 Difference]: With dead ends: 89 [2020-04-17 14:31:57,744 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 14:31:57,745 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 14:31:57,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 14:31:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-04-17 14:31:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 14:31:57,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 14:31:57,747 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 14:31:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:57,748 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 14:31:57,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:31:57,748 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 14:31:57,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:57,748 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:57,748 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:57,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:57,949 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:57,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:57,950 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-04-17 14:31:57,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:57,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984063561] [2020-04-17 14:31:57,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:58,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984063561] [2020-04-17 14:31:58,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875808389] [2020-04-17 14:31:58,051 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 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 14:31:58,116 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 14:31:58,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:58,118 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:58,118 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:58,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:58,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 14:31:58,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812487738] [2020-04-17 14:31:58,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:58,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:58,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:58,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:58,142 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 14:31:58,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:58,565 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-04-17 14:31:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:31:58,566 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 14:31:58,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:58,567 INFO L225 Difference]: With dead ends: 86 [2020-04-17 14:31:58,567 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 14:31:58,567 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 14:31:58,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 14:31:58,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-04-17 14:31:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 14:31:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 14:31:58,571 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 14:31:58,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:58,571 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 14:31:58,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:31:58,571 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 14:31:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:58,572 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:58,572 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:58,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:58,775 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:58,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:58,775 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-04-17 14:31:58,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:58,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886432088] [2020-04-17 14:31:58,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:58,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886432088] [2020-04-17 14:31:58,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975708400] [2020-04-17 14:31:58,876 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 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 14:31:58,930 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 14:31:58,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:31:58,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:31:58,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:58,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:58,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 14:31:58,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293820868] [2020-04-17 14:31:58,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:31:58,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:58,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:31:58,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:31:58,969 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 14:31:59,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:31:59,502 INFO L93 Difference]: Finished difference Result 83 states and 201 transitions. [2020-04-17 14:31:59,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:31:59,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 14:31:59,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:31:59,504 INFO L225 Difference]: With dead ends: 83 [2020-04-17 14:31:59,504 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 14:31:59,505 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=381, Invalid=1025, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 14:31:59,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 14:31:59,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2020-04-17 14:31:59,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 14:31:59,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 14:31:59,507 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 14:31:59,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:31:59,507 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 14:31:59,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:31:59,507 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 14:31:59,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:31:59,507 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:31:59,507 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:31:59,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:31:59,708 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:31:59,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:31:59,709 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-04-17 14:31:59,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:31:59,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815663240] [2020-04-17 14:31:59,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:31:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:59,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815663240] [2020-04-17 14:31:59,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058145561] [2020-04-17 14:31:59,829 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 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 14:31:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:31:59,875 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:31:59,876 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:31:59,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:31:59,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:31:59,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 14:31:59,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424124682] [2020-04-17 14:31:59,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 14:31:59,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:31:59,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 14:31:59,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-04-17 14:31:59,888 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 14:32:00,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:00,352 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-04-17 14:32:00,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:32:00,352 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 14:32:00,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:00,353 INFO L225 Difference]: With dead ends: 101 [2020-04-17 14:32:00,354 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 14:32:00,354 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 14:32:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 14:32:00,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-04-17 14:32:00,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 14:32:00,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-04-17 14:32:00,357 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-04-17 14:32:00,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:00,357 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-04-17 14:32:00,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 14:32:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-04-17 14:32:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:32:00,358 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:00,358 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:00,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:00,561 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:00,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:00,562 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-04-17 14:32:00,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:00,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946204707] [2020-04-17 14:32:00,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:00,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946204707] [2020-04-17 14:32:00,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076700860] [2020-04-17 14:32:00,688 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 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 14:32:00,733 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:00,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:00,734 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:32:00,735 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:00,756 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:00,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:00,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 14:32:00,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837788395] [2020-04-17 14:32:00,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:00,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:00,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:00,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:00,768 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-04-17 14:32:01,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:01,396 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-04-17 14:32:01,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:32:01,397 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 14:32:01,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:01,398 INFO L225 Difference]: With dead ends: 82 [2020-04-17 14:32:01,398 INFO L226 Difference]: Without dead ends: 74 [2020-04-17 14:32:01,398 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 14:32:01,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-04-17 14:32:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-04-17 14:32:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-17 14:32:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-04-17 14:32:01,401 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-04-17 14:32:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:01,401 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-04-17 14:32:01,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-04-17 14:32:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 14:32:01,401 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:01,402 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:01,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:01,605 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:01,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:01,605 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-04-17 14:32:01,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:01,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420539029] [2020-04-17 14:32:01,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:01,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420539029] [2020-04-17 14:32:01,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533047605] [2020-04-17 14:32:01,707 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 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 14:32:01,756 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 14:32:01,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:01,757 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 14:32:01,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:01,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:01,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:01,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 14:32:01,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471912367] [2020-04-17 14:32:01,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:01,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:01,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:01,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:01,797 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-04-17 14:32:02,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:02,384 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-04-17 14:32:02,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:32:02,385 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 14:32:02,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:02,386 INFO L225 Difference]: With dead ends: 92 [2020-04-17 14:32:02,386 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 14:32:02,386 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 14:32:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 14:32:02,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-04-17 14:32:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 14:32:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-04-17 14:32:02,389 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-04-17 14:32:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:02,390 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-04-17 14:32:02,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-04-17 14:32:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:02,390 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:02,390 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:02,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:02,591 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:02,592 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-04-17 14:32:02,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:02,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006062839] [2020-04-17 14:32:02,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:02,697 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:02,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006062839] [2020-04-17 14:32:02,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746628226] [2020-04-17 14:32:02,698 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 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 14:32:02,742 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:02,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:02,744 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:02,744 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:02,758 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:02,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:02,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 14:32:02,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716947135] [2020-04-17 14:32:02,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:02,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:02,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:02,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:02,771 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-04-17 14:32:03,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:03,384 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-04-17 14:32:03,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:32:03,385 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 14:32:03,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:03,386 INFO L225 Difference]: With dead ends: 78 [2020-04-17 14:32:03,386 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 14:32:03,386 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 14:32:03,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 14:32:03,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-04-17 14:32:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 14:32:03,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-04-17 14:32:03,389 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-04-17 14:32:03,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:03,389 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-04-17 14:32:03,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:03,389 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-04-17 14:32:03,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:03,390 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:03,390 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:03,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:03,592 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:03,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:03,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-04-17 14:32:03,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:03,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701077032] [2020-04-17 14:32:03,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:03,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701077032] [2020-04-17 14:32:03,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851030112] [2020-04-17 14:32:03,765 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 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 14:32:03,815 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 14:32:03,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:03,816 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:03,817 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:03,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:03,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 14:32:03,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183849832] [2020-04-17 14:32:03,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:03,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:03,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:03,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:03,824 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-04-17 14:32:04,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:04,101 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-04-17 14:32:04,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 14:32:04,102 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 14:32:04,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:04,103 INFO L225 Difference]: With dead ends: 84 [2020-04-17 14:32:04,103 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 14:32:04,103 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-04-17 14:32:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 14:32:04,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-04-17 14:32:04,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 14:32:04,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-04-17 14:32:04,106 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-04-17 14:32:04,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:04,106 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-04-17 14:32:04,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:04,106 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-04-17 14:32:04,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:04,106 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:04,107 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:04,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:04,307 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:04,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:04,308 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-04-17 14:32:04,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:04,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601737246] [2020-04-17 14:32:04,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:04,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601737246] [2020-04-17 14:32:04,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479757191] [2020-04-17 14:32:04,456 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 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 14:32:04,506 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 14:32:04,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:04,507 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:04,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:04,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:04,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:04,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 14:32:04,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882769686] [2020-04-17 14:32:04,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:04,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:04,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:04,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:04,531 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-04-17 14:32:04,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:04,845 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-04-17 14:32:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 14:32:04,845 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 14:32:04,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:04,846 INFO L225 Difference]: With dead ends: 98 [2020-04-17 14:32:04,847 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 14:32:04,847 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-04-17 14:32:04,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 14:32:04,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-04-17 14:32:04,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 14:32:04,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-04-17 14:32:04,850 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-04-17 14:32:04,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:04,850 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-04-17 14:32:04,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:04,850 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-04-17 14:32:04,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:04,851 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:04,851 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:05,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:05,054 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:05,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:05,055 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-04-17 14:32:05,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:05,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651732870] [2020-04-17 14:32:05,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:05,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651732870] [2020-04-17 14:32:05,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902186891] [2020-04-17 14:32:05,201 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 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 14:32:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:05,247 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:05,248 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:05,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:05,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 14:32:05,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694274281] [2020-04-17 14:32:05,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:05,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:05,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:05,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:05,257 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-04-17 14:32:05,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:05,611 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-04-17 14:32:05,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:32:05,612 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 14:32:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:05,613 INFO L225 Difference]: With dead ends: 99 [2020-04-17 14:32:05,613 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 14:32:05,613 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 14:32:05,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 14:32:05,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-04-17 14:32:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 14:32:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-04-17 14:32:05,616 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-04-17 14:32:05,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:05,616 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-04-17 14:32:05,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:05,616 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-04-17 14:32:05,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:05,616 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:05,616 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:05,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:05,817 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:05,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:05,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-04-17 14:32:05,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:05,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059688844] [2020-04-17 14:32:05,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:05,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059688844] [2020-04-17 14:32:05,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795126130] [2020-04-17 14:32:05,981 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 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 14:32:06,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:06,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:06,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:06,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:06,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:06,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:06,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 14:32:06,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175803108] [2020-04-17 14:32:06,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:06,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:06,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:06,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:06,076 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-04-17 14:32:06,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:06,454 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-04-17 14:32:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:32:06,454 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 14:32:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:06,455 INFO L225 Difference]: With dead ends: 109 [2020-04-17 14:32:06,455 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 14:32:06,456 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 14:32:06,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 14:32:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-04-17 14:32:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 14:32:06,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-04-17 14:32:06,458 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-04-17 14:32:06,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:06,459 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-04-17 14:32:06,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:06,459 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-04-17 14:32:06,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:06,459 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:06,459 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:06,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:06,663 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:06,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:06,663 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-04-17 14:32:06,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:06,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434380067] [2020-04-17 14:32:06,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:06,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434380067] [2020-04-17 14:32:06,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735687013] [2020-04-17 14:32:06,804 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 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 14:32:06,854 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 14:32:06,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:06,855 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:06,856 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:06,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:06,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 14:32:06,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970412699] [2020-04-17 14:32:06,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:06,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:06,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:06,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:06,865 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-04-17 14:32:07,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:07,229 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-04-17 14:32:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:32:07,230 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 14:32:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:07,231 INFO L225 Difference]: With dead ends: 109 [2020-04-17 14:32:07,231 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 14:32:07,232 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 14:32:07,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 14:32:07,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-04-17 14:32:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-17 14:32:07,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-04-17 14:32:07,235 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-04-17 14:32:07,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:07,235 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-04-17 14:32:07,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:07,235 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-04-17 14:32:07,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:07,236 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:07,236 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:07,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:07,440 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:07,440 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-04-17 14:32:07,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:07,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955925438] [2020-04-17 14:32:07,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:07,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955925438] [2020-04-17 14:32:07,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25034550] [2020-04-17 14:32:07,584 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 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 14:32:07,668 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:07,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:07,669 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:07,671 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:07,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:07,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:07,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 14:32:07,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131461825] [2020-04-17 14:32:07,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:07,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:07,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:07,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:07,715 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-04-17 14:32:08,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:08,393 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-04-17 14:32:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:32:08,394 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 14:32:08,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:08,395 INFO L225 Difference]: With dead ends: 106 [2020-04-17 14:32:08,396 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 14:32:08,396 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 14:32:08,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 14:32:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-04-17 14:32:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 14:32:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-04-17 14:32:08,399 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-04-17 14:32:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:08,400 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-04-17 14:32:08,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:08,400 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-04-17 14:32:08,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:08,401 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:08,401 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:08,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:08,602 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:08,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:08,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-04-17 14:32:08,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:08,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499810374] [2020-04-17 14:32:08,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:08,835 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:08,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499810374] [2020-04-17 14:32:08,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100388560] [2020-04-17 14:32:08,836 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 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 14:32:08,923 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 14:32:08,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:08,925 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:08,926 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:08,944 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:08,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:08,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 14:32:08,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376900676] [2020-04-17 14:32:08,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:08,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:08,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:08,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:08,946 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-04-17 14:32:09,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:09,441 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-04-17 14:32:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:32:09,441 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 14:32:09,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:09,442 INFO L225 Difference]: With dead ends: 107 [2020-04-17 14:32:09,442 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 14:32:09,442 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 14:32:09,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 14:32:09,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-04-17 14:32:09,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-17 14:32:09,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-04-17 14:32:09,445 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-04-17 14:32:09,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:09,445 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-04-17 14:32:09,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:09,445 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-04-17 14:32:09,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:09,446 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:09,446 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:09,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:09,651 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:09,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-04-17 14:32:09,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:09,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415920772] [2020-04-17 14:32:09,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:09,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415920772] [2020-04-17 14:32:09,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394735709] [2020-04-17 14:32:09,806 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 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 14:32:09,858 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 14:32:09,858 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:09,859 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:09,860 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:09,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:09,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:09,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 14:32:09,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122230353] [2020-04-17 14:32:09,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:09,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:09,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:09,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:09,884 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-04-17 14:32:10,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:10,409 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-04-17 14:32:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:32:10,410 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 14:32:10,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:10,411 INFO L225 Difference]: With dead ends: 104 [2020-04-17 14:32:10,411 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 14:32:10,411 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 14:32:10,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 14:32:10,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-04-17 14:32:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 14:32:10,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-04-17 14:32:10,414 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-04-17 14:32:10,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:10,415 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-04-17 14:32:10,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-04-17 14:32:10,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:10,415 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:10,415 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:10,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:10,619 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:10,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:10,619 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-04-17 14:32:10,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:10,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580541744] [2020-04-17 14:32:10,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:10,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580541744] [2020-04-17 14:32:10,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7692933] [2020-04-17 14:32:10,735 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 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 14:32:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:10,782 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:10,782 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:10,797 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:10,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:10,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 14:32:10,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340078371] [2020-04-17 14:32:10,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:10,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:10,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:10,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:10,799 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-04-17 14:32:11,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:11,284 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-04-17 14:32:11,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:32:11,284 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 14:32:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:11,285 INFO L225 Difference]: With dead ends: 105 [2020-04-17 14:32:11,285 INFO L226 Difference]: Without dead ends: 99 [2020-04-17 14:32:11,286 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 14:32:11,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-04-17 14:32:11,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-04-17 14:32:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 14:32:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 14:32:11,289 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-04-17 14:32:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:11,289 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 14:32:11,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:11,290 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 14:32:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:11,290 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:11,290 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:11,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:11,494 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:11,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:11,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-04-17 14:32:11,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:11,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721263222] [2020-04-17 14:32:11,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:11,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721263222] [2020-04-17 14:32:11,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519017232] [2020-04-17 14:32:11,616 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 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 14:32:11,662 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:11,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:11,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:11,664 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:11,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:11,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:11,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 14:32:11,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339690141] [2020-04-17 14:32:11,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:11,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:11,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:11,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:11,692 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-04-17 14:32:12,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:12,286 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-04-17 14:32:12,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:32:12,286 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 14:32:12,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:12,287 INFO L225 Difference]: With dead ends: 102 [2020-04-17 14:32:12,287 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 14:32:12,288 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 14:32:12,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 14:32:12,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-04-17 14:32:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 14:32:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 14:32:12,291 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-04-17 14:32:12,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:12,291 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 14:32:12,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:12,291 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 14:32:12,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:12,292 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:12,292 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:12,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:12,495 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:12,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:12,496 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-04-17 14:32:12,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:12,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115465299] [2020-04-17 14:32:12,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:12,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115465299] [2020-04-17 14:32:12,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964028414] [2020-04-17 14:32:12,611 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 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 14:32:12,663 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 14:32:12,663 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:12,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:12,664 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:12,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:12,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 14:32:12,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66653350] [2020-04-17 14:32:12,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:12,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:12,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:12,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:12,675 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-04-17 14:32:13,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:13,175 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-04-17 14:32:13,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:32:13,176 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 14:32:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:13,177 INFO L225 Difference]: With dead ends: 103 [2020-04-17 14:32:13,177 INFO L226 Difference]: Without dead ends: 97 [2020-04-17 14:32:13,178 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 14:32:13,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-04-17 14:32:13,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-04-17 14:32:13,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 14:32:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-04-17 14:32:13,180 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-04-17 14:32:13,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:13,181 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-04-17 14:32:13,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:13,181 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-04-17 14:32:13,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:13,181 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:13,181 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:13,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:13,384 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:13,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:13,384 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-04-17 14:32:13,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:13,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281338688] [2020-04-17 14:32:13,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:13,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281338688] [2020-04-17 14:32:13,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688990090] [2020-04-17 14:32:13,509 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 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 14:32:13,559 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:13,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:13,561 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:13,562 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:13,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:13,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:13,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 14:32:13,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753857859] [2020-04-17 14:32:13,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:13,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:13,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:13,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:13,588 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-04-17 14:32:14,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:14,221 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-04-17 14:32:14,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:32:14,221 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 14:32:14,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:14,222 INFO L225 Difference]: With dead ends: 100 [2020-04-17 14:32:14,222 INFO L226 Difference]: Without dead ends: 94 [2020-04-17 14:32:14,222 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 14:32:14,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-04-17 14:32:14,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-04-17 14:32:14,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 14:32:14,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-04-17 14:32:14,225 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-04-17 14:32:14,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:14,226 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-04-17 14:32:14,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:14,226 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-04-17 14:32:14,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:14,226 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:14,226 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:14,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:14,430 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:14,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:14,430 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-04-17 14:32:14,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:14,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838596554] [2020-04-17 14:32:14,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:14,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:14,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838596554] [2020-04-17 14:32:14,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092445004] [2020-04-17 14:32:14,541 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 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 14:32:14,593 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 14:32:14,593 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:14,594 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 14:32:14,595 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:14,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:14,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 14:32:14,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660480910] [2020-04-17 14:32:14,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 14:32:14,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:14,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 14:32:14,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 14:32:14,630 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-04-17 14:32:15,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:15,332 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-04-17 14:32:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:32:15,333 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 14:32:15,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:15,333 INFO L225 Difference]: With dead ends: 120 [2020-04-17 14:32:15,333 INFO L226 Difference]: Without dead ends: 114 [2020-04-17 14:32:15,334 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 14:32:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-17 14:32:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-04-17 14:32:15,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 14:32:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-04-17 14:32:15,336 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-04-17 14:32:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:15,337 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-04-17 14:32:15,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 14:32:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-04-17 14:32:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 14:32:15,337 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:15,337 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:15,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:15,541 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:15,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:15,541 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-04-17 14:32:15,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:15,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114539212] [2020-04-17 14:32:15,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:15,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114539212] [2020-04-17 14:32:15,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459424740] [2020-04-17 14:32:15,676 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 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 14:32:15,777 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 14:32:15,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:15,779 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:15,781 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:15,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:15,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 14:32:15,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462534169] [2020-04-17 14:32:15,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:15,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:15,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:15,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:15,831 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-04-17 14:32:16,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:16,798 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-04-17 14:32:16,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:32:16,799 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 14:32:16,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:16,800 INFO L225 Difference]: With dead ends: 101 [2020-04-17 14:32:16,800 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 14:32:16,800 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 14:32:16,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 14:32:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-04-17 14:32:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-17 14:32:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-04-17 14:32:16,804 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-04-17 14:32:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:16,804 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-04-17 14:32:16,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-04-17 14:32:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:16,805 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:16,805 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:17,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:17,006 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:17,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-04-17 14:32:17,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:17,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788524167] [2020-04-17 14:32:17,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:17,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788524167] [2020-04-17 14:32:17,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904239846] [2020-04-17 14:32:17,204 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 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 14:32:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:17,251 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:17,252 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:17,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:17,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 14:32:17,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702353290] [2020-04-17 14:32:17,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:17,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:17,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:17,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:17,260 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-04-17 14:32:17,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:17,570 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-04-17 14:32:17,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:32:17,571 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 14:32:17,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:17,572 INFO L225 Difference]: With dead ends: 114 [2020-04-17 14:32:17,572 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 14:32:17,572 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 14:32:17,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 14:32:17,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-04-17 14:32:17,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:32:17,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 14:32:17,575 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 14:32:17,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:17,575 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 14:32:17,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:17,575 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 14:32:17,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:17,576 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:17,576 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:17,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:17,781 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:17,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:17,782 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-04-17 14:32:17,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:17,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647443892] [2020-04-17 14:32:17,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:17,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647443892] [2020-04-17 14:32:17,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233262172] [2020-04-17 14:32:17,965 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 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 14:32:18,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:18,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:18,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:18,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:18,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:18,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:18,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 14:32:18,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521251563] [2020-04-17 14:32:18,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:18,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:18,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:18,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:18,047 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 14:32:18,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:18,437 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-04-17 14:32:18,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:32:18,438 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 14:32:18,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:18,439 INFO L225 Difference]: With dead ends: 111 [2020-04-17 14:32:18,439 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 14:32:18,439 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 14:32:18,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 14:32:18,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-04-17 14:32:18,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:32:18,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 14:32:18,442 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 14:32:18,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:18,442 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 14:32:18,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:18,442 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 14:32:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:18,443 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:18,443 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:18,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:18,644 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:18,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:18,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-04-17 14:32:18,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:18,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363610153] [2020-04-17 14:32:18,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:18,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363610153] [2020-04-17 14:32:18,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743910459] [2020-04-17 14:32:18,845 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 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 14:32:18,940 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 14:32:18,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:18,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:18,944 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:18,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:18,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 14:32:18,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881431615] [2020-04-17 14:32:18,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:18,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:18,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:18,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:18,971 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 14:32:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:19,482 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-04-17 14:32:19,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:32:19,483 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 14:32:19,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:19,484 INFO L225 Difference]: With dead ends: 108 [2020-04-17 14:32:19,484 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 14:32:19,485 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 14:32:19,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 14:32:19,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-04-17 14:32:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:32:19,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 14:32:19,488 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 14:32:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:19,489 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 14:32:19,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:19,489 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 14:32:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:19,490 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:19,490 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:19,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:19,694 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:19,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:19,695 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-04-17 14:32:19,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:19,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783551441] [2020-04-17 14:32:19,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:19,970 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:19,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783551441] [2020-04-17 14:32:19,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142055925] [2020-04-17 14:32:19,971 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 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 14:32:20,053 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:20,053 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:20,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:20,056 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:20,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:20,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:20,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 14:32:20,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605888852] [2020-04-17 14:32:20,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:20,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:20,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:20,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:20,103 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 14:32:20,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:20,750 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-04-17 14:32:20,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:32:20,750 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 14:32:20,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:20,751 INFO L225 Difference]: With dead ends: 107 [2020-04-17 14:32:20,751 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 14:32:20,751 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 14:32:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 14:32:20,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-04-17 14:32:20,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:32:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 14:32:20,753 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 14:32:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:20,753 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 14:32:20,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 14:32:20,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:20,754 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:20,754 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:20,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:20,957 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:20,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:20,957 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-04-17 14:32:20,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:20,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942381820] [2020-04-17 14:32:20,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:21,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942381820] [2020-04-17 14:32:21,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478019428] [2020-04-17 14:32:21,100 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 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 14:32:21,151 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 14:32:21,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:21,152 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:21,153 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:21,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:21,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 14:32:21,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512870041] [2020-04-17 14:32:21,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:21,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:21,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:21,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:21,162 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 14:32:21,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:21,569 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-04-17 14:32:21,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:32:21,570 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 14:32:21,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:21,571 INFO L225 Difference]: With dead ends: 104 [2020-04-17 14:32:21,571 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 14:32:21,571 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 14:32:21,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 14:32:21,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-04-17 14:32:21,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:32:21,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 14:32:21,574 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 14:32:21,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:21,574 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 14:32:21,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:21,575 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 14:32:21,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:21,575 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:21,575 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:21,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:21,778 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:21,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:21,779 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-04-17 14:32:21,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:21,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384645713] [2020-04-17 14:32:21,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:21,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384645713] [2020-04-17 14:32:21,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631962403] [2020-04-17 14:32:21,927 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 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 14:32:21,978 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 14:32:21,979 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:21,980 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:21,981 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:21,998 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:22,007 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:22,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:22,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 14:32:22,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61869928] [2020-04-17 14:32:22,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:22,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:22,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:22,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:22,009 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 14:32:22,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:22,553 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-04-17 14:32:22,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:32:22,553 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 14:32:22,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:22,554 INFO L225 Difference]: With dead ends: 103 [2020-04-17 14:32:22,554 INFO L226 Difference]: Without dead ends: 97 [2020-04-17 14:32:22,555 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 14:32:22,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-04-17 14:32:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-04-17 14:32:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:32:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 14:32:22,558 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 14:32:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:22,558 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 14:32:22,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:22,558 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 14:32:22,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:22,559 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:22,559 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:22,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:22,762 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:22,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:22,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-04-17 14:32:22,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:22,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411551319] [2020-04-17 14:32:22,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:22,896 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:22,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411551319] [2020-04-17 14:32:22,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503411799] [2020-04-17 14:32:22,896 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 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 14:32:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:22,945 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:22,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:22,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:22,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 14:32:22,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275240807] [2020-04-17 14:32:22,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:22,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:22,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:22,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:22,956 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 14:32:23,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:23,393 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-04-17 14:32:23,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:32:23,394 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 14:32:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:23,395 INFO L225 Difference]: With dead ends: 100 [2020-04-17 14:32:23,395 INFO L226 Difference]: Without dead ends: 94 [2020-04-17 14:32:23,395 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 14:32:23,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-04-17 14:32:23,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-04-17 14:32:23,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:32:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 14:32:23,399 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 14:32:23,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:23,399 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 14:32:23,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 14:32:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:23,399 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:23,399 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:23,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:23,603 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:23,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:23,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-04-17 14:32:23,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:23,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292052159] [2020-04-17 14:32:23,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:23,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292052159] [2020-04-17 14:32:23,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947419018] [2020-04-17 14:32:23,791 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 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 14:32:23,869 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:23,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:23,871 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:23,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:23,919 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:23,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:23,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 14:32:23,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405989385] [2020-04-17 14:32:23,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:23,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:23,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:23,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:23,938 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 14:32:24,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:24,569 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-04-17 14:32:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:32:24,570 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 14:32:24,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:24,571 INFO L225 Difference]: With dead ends: 99 [2020-04-17 14:32:24,571 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 14:32:24,572 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 14:32:24,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 14:32:24,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-04-17 14:32:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:32:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 14:32:24,575 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 14:32:24,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:24,575 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 14:32:24,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:24,575 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 14:32:24,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:24,576 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:24,576 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:24,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:24,779 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:24,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:24,780 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-04-17 14:32:24,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:24,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972887963] [2020-04-17 14:32:24,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:24,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972887963] [2020-04-17 14:32:24,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724140558] [2020-04-17 14:32:24,910 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 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 14:32:24,962 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 14:32:24,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:24,963 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:24,963 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:24,974 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:24,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:24,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 14:32:24,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588948097] [2020-04-17 14:32:24,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:24,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:24,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:24,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:24,975 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 14:32:25,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:25,466 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-04-17 14:32:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:32:25,467 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 14:32:25,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:25,467 INFO L225 Difference]: With dead ends: 96 [2020-04-17 14:32:25,467 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 14:32:25,468 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 14:32:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 14:32:25,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-04-17 14:32:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:32:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 14:32:25,470 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 14:32:25,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:25,471 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 14:32:25,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:25,471 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 14:32:25,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:25,472 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:25,472 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:25,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:25,675 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:25,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:25,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-04-17 14:32:25,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:25,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262238162] [2020-04-17 14:32:25,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:25,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262238162] [2020-04-17 14:32:25,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716122189] [2020-04-17 14:32:25,836 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 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 14:32:25,882 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:25,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:25,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:25,884 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:25,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:25,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:25,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 14:32:25,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317539157] [2020-04-17 14:32:25,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:25,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:25,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:25,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:25,909 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 14:32:26,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:26,572 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-04-17 14:32:26,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:32:26,572 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 14:32:26,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:26,573 INFO L225 Difference]: With dead ends: 95 [2020-04-17 14:32:26,573 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 14:32:26,573 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 14:32:26,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 14:32:26,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-04-17 14:32:26,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:32:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 14:32:26,576 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 14:32:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:26,576 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 14:32:26,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 14:32:26,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:26,576 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:26,576 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:26,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:26,777 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:26,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:26,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-04-17 14:32:26,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:26,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997753377] [2020-04-17 14:32:26,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:26,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997753377] [2020-04-17 14:32:26,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106994060] [2020-04-17 14:32:26,898 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 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 14:32:26,946 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 14:32:26,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:26,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:26,948 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:26,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:26,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 14:32:26,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514659807] [2020-04-17 14:32:26,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:26,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:26,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:26,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:26,960 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 14:32:27,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:27,495 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-04-17 14:32:27,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:32:27,496 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 14:32:27,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:27,496 INFO L225 Difference]: With dead ends: 92 [2020-04-17 14:32:27,496 INFO L226 Difference]: Without dead ends: 86 [2020-04-17 14:32:27,497 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 14:32:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-04-17 14:32:27,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-04-17 14:32:27,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:32:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 14:32:27,499 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 14:32:27,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:27,500 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 14:32:27,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 14:32:27,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:27,500 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:27,500 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:27,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:27,704 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:27,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:27,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-04-17 14:32:27,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:27,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898029458] [2020-04-17 14:32:27,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:27,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898029458] [2020-04-17 14:32:27,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787996077] [2020-04-17 14:32:27,885 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 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 14:32:27,979 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 14:32:27,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:27,981 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:27,982 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:28,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:28,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:28,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 14:32:28,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86097978] [2020-04-17 14:32:28,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:28,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:28,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:28,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:28,039 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 14:32:29,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:29,143 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-04-17 14:32:29,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:32:29,143 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 14:32:29,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:29,144 INFO L225 Difference]: With dead ends: 91 [2020-04-17 14:32:29,144 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 14:32:29,145 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 14:32:29,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 14:32:29,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-04-17 14:32:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:32:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 14:32:29,148 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 14:32:29,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:29,149 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 14:32:29,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:29,149 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 14:32:29,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:29,150 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:29,150 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:29,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:29,351 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:29,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:29,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-04-17 14:32:29,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:29,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523876981] [2020-04-17 14:32:29,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:29,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523876981] [2020-04-17 14:32:29,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080354964] [2020-04-17 14:32:29,472 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 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 14:32:29,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:29,520 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:29,523 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:29,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:29,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 14:32:29,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778660605] [2020-04-17 14:32:29,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 14:32:29,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:29,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 14:32:29,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-04-17 14:32:29,543 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 14:32:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:30,109 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-04-17 14:32:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:32:30,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 14:32:30,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:30,110 INFO L225 Difference]: With dead ends: 107 [2020-04-17 14:32:30,110 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 14:32:30,110 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 14:32:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 14:32:30,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-04-17 14:32:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 14:32:30,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-04-17 14:32:30,114 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-04-17 14:32:30,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:30,115 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-04-17 14:32:30,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 14:32:30,115 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-04-17 14:32:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:30,115 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:30,115 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:30,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:30,318 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:30,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:30,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-04-17 14:32:30,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:30,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578298810] [2020-04-17 14:32:30,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:30,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578298810] [2020-04-17 14:32:30,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735826756] [2020-04-17 14:32:30,505 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 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 14:32:30,581 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:30,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:30,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:30,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:30,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:30,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 14:32:30,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344034931] [2020-04-17 14:32:30,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:30,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:30,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:30,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:30,651 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-04-17 14:32:31,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:31,573 INFO L93 Difference]: Finished difference Result 86 states and 213 transitions. [2020-04-17 14:32:31,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:32:31,574 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 14:32:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:31,575 INFO L225 Difference]: With dead ends: 86 [2020-04-17 14:32:31,575 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 14:32:31,576 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 14:32:31,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 14:32:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-04-17 14:32:31,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 14:32:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-04-17 14:32:31,578 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-04-17 14:32:31,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:31,579 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-04-17 14:32:31,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-04-17 14:32:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 14:32:31,580 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:31,580 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:31,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:31,785 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:31,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:31,785 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-04-17 14:32:31,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:31,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347278843] [2020-04-17 14:32:31,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:31,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347278843] [2020-04-17 14:32:31,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311059397] [2020-04-17 14:32:31,933 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 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 14:32:31,985 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 14:32:31,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:31,986 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 14:32:31,986 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:32,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:32,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:32,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 14:32:32,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816001958] [2020-04-17 14:32:32,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:32,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:32,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:32,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:32,014 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-04-17 14:32:32,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:32,702 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-04-17 14:32:32,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:32:32,702 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 14:32:32,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:32,703 INFO L225 Difference]: With dead ends: 100 [2020-04-17 14:32:32,703 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 14:32:32,703 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:32:32,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 14:32:32,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-04-17 14:32:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 14:32:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-04-17 14:32:32,707 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-04-17 14:32:32,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:32,707 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-04-17 14:32:32,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-04-17 14:32:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:32,707 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:32,707 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:32,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:32,908 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:32,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:32,909 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-04-17 14:32:32,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:32,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280215975] [2020-04-17 14:32:32,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:33,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280215975] [2020-04-17 14:32:33,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600895744] [2020-04-17 14:32:33,042 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 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 14:32:33,091 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:33,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:33,092 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:33,093 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:33,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:33,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:33,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:33,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531298206] [2020-04-17 14:32:33,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:33,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:33,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:33,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:33,124 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-04-17 14:32:33,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:33,906 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-04-17 14:32:33,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:32:33,906 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:33,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:33,907 INFO L225 Difference]: With dead ends: 84 [2020-04-17 14:32:33,907 INFO L226 Difference]: Without dead ends: 79 [2020-04-17 14:32:33,908 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:32:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-17 14:32:33,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-04-17 14:32:33,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 14:32:33,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-04-17 14:32:33,910 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-04-17 14:32:33,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:33,910 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-04-17 14:32:33,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:33,910 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-04-17 14:32:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:33,911 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:33,911 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:34,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:34,111 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:34,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:34,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-04-17 14:32:34,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:34,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880076486] [2020-04-17 14:32:34,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:34,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880076486] [2020-04-17 14:32:34,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897392167] [2020-04-17 14:32:34,283 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 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 14:32:34,337 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 14:32:34,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:34,339 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:34,340 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:34,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:34,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 14:32:34,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076285909] [2020-04-17 14:32:34,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:34,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:34,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:34,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:34,364 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-04-17 14:32:34,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:34,636 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-04-17 14:32:34,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 14:32:34,637 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 14:32:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:34,637 INFO L225 Difference]: With dead ends: 90 [2020-04-17 14:32:34,637 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 14:32:34,638 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-04-17 14:32:34,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 14:32:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-04-17 14:32:34,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 14:32:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-04-17 14:32:34,640 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-04-17 14:32:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:34,640 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-04-17 14:32:34,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:34,640 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-04-17 14:32:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:34,641 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:34,641 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:34,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:34,845 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:34,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:34,845 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-04-17 14:32:34,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:34,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391965063] [2020-04-17 14:32:34,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:35,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391965063] [2020-04-17 14:32:35,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472773547] [2020-04-17 14:32:35,086 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 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 14:32:35,184 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 14:32:35,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:35,185 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:35,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:35,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:35,228 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:35,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:35,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:35,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058640528] [2020-04-17 14:32:35,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:35,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:35,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:35,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:35,235 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-04-17 14:32:35,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:35,781 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-04-17 14:32:35,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 14:32:35,781 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:35,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:35,782 INFO L225 Difference]: With dead ends: 106 [2020-04-17 14:32:35,782 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 14:32:35,783 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 14:32:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 14:32:35,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-04-17 14:32:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 14:32:35,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-04-17 14:32:35,786 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-04-17 14:32:35,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:35,786 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-04-17 14:32:35,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:35,786 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-04-17 14:32:35,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:35,786 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:35,787 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:35,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:35,987 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:35,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:35,987 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-04-17 14:32:35,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:35,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644879876] [2020-04-17 14:32:35,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:36,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644879876] [2020-04-17 14:32:36,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537869152] [2020-04-17 14:32:36,156 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 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 14:32:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:36,206 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:36,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:36,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:36,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 14:32:36,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098541660] [2020-04-17 14:32:36,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:36,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:36,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:36,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:36,217 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-04-17 14:32:36,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:36,659 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-04-17 14:32:36,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:32:36,659 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 14:32:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:36,660 INFO L225 Difference]: With dead ends: 107 [2020-04-17 14:32:36,660 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 14:32:36,661 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 14:32:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 14:32:36,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-04-17 14:32:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-17 14:32:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-04-17 14:32:36,663 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-04-17 14:32:36,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:36,664 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-04-17 14:32:36,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-04-17 14:32:36,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:36,664 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:36,665 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:36,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:36,868 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:36,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:36,869 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-04-17 14:32:36,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:36,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498312630] [2020-04-17 14:32:36,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:37,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498312630] [2020-04-17 14:32:37,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704125519] [2020-04-17 14:32:37,047 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 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 14:32:37,100 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:37,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:37,102 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:37,103 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:37,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:37,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:37,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:37,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432710575] [2020-04-17 14:32:37,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:37,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:37,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:37,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:37,129 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-04-17 14:32:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:37,591 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-04-17 14:32:37,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:32:37,592 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:37,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:37,592 INFO L225 Difference]: With dead ends: 119 [2020-04-17 14:32:37,592 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 14:32:37,593 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 14:32:37,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 14:32:37,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-04-17 14:32:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 14:32:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-04-17 14:32:37,595 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-04-17 14:32:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:37,595 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-04-17 14:32:37,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-04-17 14:32:37,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:37,596 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:37,597 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:37,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:37,798 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:37,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:37,798 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-04-17 14:32:37,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:37,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004475848] [2020-04-17 14:32:37,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:37,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004475848] [2020-04-17 14:32:37,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905955633] [2020-04-17 14:32:37,967 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 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 14:32:38,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 14:32:38,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:38,024 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:38,025 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:38,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:38,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 14:32:38,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970608861] [2020-04-17 14:32:38,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:38,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:38,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:38,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:38,034 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-04-17 14:32:38,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:38,481 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-04-17 14:32:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:32:38,481 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 14:32:38,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:38,482 INFO L225 Difference]: With dead ends: 119 [2020-04-17 14:32:38,482 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 14:32:38,483 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 14:32:38,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 14:32:38,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-04-17 14:32:38,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 14:32:38,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-04-17 14:32:38,485 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-04-17 14:32:38,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:38,485 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-04-17 14:32:38,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:38,486 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-04-17 14:32:38,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:38,486 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:38,486 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:38,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:38,690 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:38,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:38,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-04-17 14:32:38,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:38,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526011899] [2020-04-17 14:32:38,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:38,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:38,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526011899] [2020-04-17 14:32:38,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235383316] [2020-04-17 14:32:38,854 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 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 14:32:38,906 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:38,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:38,908 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:38,908 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:38,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:38,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:38,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:38,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835179341] [2020-04-17 14:32:38,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:38,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:38,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:38,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:38,934 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-04-17 14:32:39,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:39,445 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-04-17 14:32:39,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:32:39,446 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:39,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:39,446 INFO L225 Difference]: With dead ends: 116 [2020-04-17 14:32:39,446 INFO L226 Difference]: Without dead ends: 110 [2020-04-17 14:32:39,447 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 14:32:39,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-17 14:32:39,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-04-17 14:32:39,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 14:32:39,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-04-17 14:32:39,449 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-04-17 14:32:39,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:39,450 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-04-17 14:32:39,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:39,450 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-04-17 14:32:39,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:39,450 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:39,450 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:39,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:39,651 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:39,652 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-04-17 14:32:39,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:39,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210697845] [2020-04-17 14:32:39,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:39,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210697845] [2020-04-17 14:32:39,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153475826] [2020-04-17 14:32:39,804 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 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 14:32:39,860 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 14:32:39,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:39,861 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:39,862 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:39,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:39,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 14:32:39,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625904433] [2020-04-17 14:32:39,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:39,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:39,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:39,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:39,875 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-04-17 14:32:40,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:40,355 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-04-17 14:32:40,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:32:40,355 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 14:32:40,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:40,356 INFO L225 Difference]: With dead ends: 117 [2020-04-17 14:32:40,356 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 14:32:40,357 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 14:32:40,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 14:32:40,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-04-17 14:32:40,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 14:32:40,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-04-17 14:32:40,359 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-04-17 14:32:40,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:40,359 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-04-17 14:32:40,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:40,359 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-04-17 14:32:40,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:40,360 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:40,360 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:40,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:40,561 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:40,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:40,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-04-17 14:32:40,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:40,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672403189] [2020-04-17 14:32:40,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:40,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672403189] [2020-04-17 14:32:40,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473191686] [2020-04-17 14:32:40,787 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 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 14:32:40,864 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 14:32:40,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:40,867 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:40,868 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:40,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:40,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:40,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:40,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179300662] [2020-04-17 14:32:40,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:40,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:40,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:40,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:40,906 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-04-17 14:32:41,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:41,482 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-04-17 14:32:41,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:32:41,482 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:41,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:41,483 INFO L225 Difference]: With dead ends: 114 [2020-04-17 14:32:41,483 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 14:32:41,484 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 14:32:41,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 14:32:41,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-04-17 14:32:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 14:32:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-04-17 14:32:41,486 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-04-17 14:32:41,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:41,486 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-04-17 14:32:41,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:41,487 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-04-17 14:32:41,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:41,487 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:41,487 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:41,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:41,691 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:41,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:41,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-04-17 14:32:41,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:41,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204213156] [2020-04-17 14:32:41,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:41,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204213156] [2020-04-17 14:32:41,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348311671] [2020-04-17 14:32:41,839 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 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 14:32:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:41,888 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:41,888 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:41,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:41,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 14:32:41,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856314470] [2020-04-17 14:32:41,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:41,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:41,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:41,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:41,926 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-04-17 14:32:42,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:42,441 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-04-17 14:32:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:32:42,442 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 14:32:42,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:42,443 INFO L225 Difference]: With dead ends: 115 [2020-04-17 14:32:42,443 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 14:32:42,443 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 14:32:42,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 14:32:42,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-04-17 14:32:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-17 14:32:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-04-17 14:32:42,447 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-04-17 14:32:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:42,447 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-04-17 14:32:42,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-04-17 14:32:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:42,447 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:42,448 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:42,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:42,651 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:42,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:42,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-04-17 14:32:42,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:42,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77453925] [2020-04-17 14:32:42,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:42,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77453925] [2020-04-17 14:32:42,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571264941] [2020-04-17 14:32:42,794 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 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 14:32:42,843 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:42,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:42,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:42,846 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:42,888 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:42,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:42,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:42,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11558890] [2020-04-17 14:32:42,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:42,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:42,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:42,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:42,901 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-04-17 14:32:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:43,531 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-04-17 14:32:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:32:43,532 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:43,533 INFO L225 Difference]: With dead ends: 112 [2020-04-17 14:32:43,533 INFO L226 Difference]: Without dead ends: 106 [2020-04-17 14:32:43,533 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 14:32:43,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-04-17 14:32:43,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-04-17 14:32:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 14:32:43,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-04-17 14:32:43,536 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-04-17 14:32:43,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:43,536 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-04-17 14:32:43,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:43,536 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-04-17 14:32:43,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:43,537 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:43,537 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:43,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:43,741 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:43,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:43,741 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-04-17 14:32:43,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:43,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74528964] [2020-04-17 14:32:43,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:43,880 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:43,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74528964] [2020-04-17 14:32:43,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748165648] [2020-04-17 14:32:43,881 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 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 14:32:43,935 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 14:32:43,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:43,936 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:32:43,937 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:43,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:43,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 14:32:43,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055280175] [2020-04-17 14:32:43,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:43,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:43,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:43,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:43,948 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-04-17 14:32:44,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:44,503 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-04-17 14:32:44,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:32:44,503 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 14:32:44,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:44,504 INFO L225 Difference]: With dead ends: 113 [2020-04-17 14:32:44,504 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 14:32:44,504 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 14:32:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 14:32:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-04-17 14:32:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:32:44,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 14:32:44,507 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-04-17 14:32:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:44,507 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 14:32:44,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 14:32:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:44,508 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:44,508 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:44,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:44,708 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-04-17 14:32:44,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:44,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652178518] [2020-04-17 14:32:44,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:44,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652178518] [2020-04-17 14:32:44,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735262702] [2020-04-17 14:32:44,853 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 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 14:32:44,901 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:44,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:44,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:44,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:44,917 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:44,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:44,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:44,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374493585] [2020-04-17 14:32:44,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:44,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:44,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:44,927 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-04-17 14:32:45,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:45,637 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-04-17 14:32:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:32:45,638 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:45,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:45,638 INFO L225 Difference]: With dead ends: 110 [2020-04-17 14:32:45,639 INFO L226 Difference]: Without dead ends: 104 [2020-04-17 14:32:45,639 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 14:32:45,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-17 14:32:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-04-17 14:32:45,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:32:45,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 14:32:45,641 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-04-17 14:32:45,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:45,642 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 14:32:45,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:45,642 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 14:32:45,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:45,642 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:45,642 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:45,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:45,843 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:45,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:45,844 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-04-17 14:32:45,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:45,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192595447] [2020-04-17 14:32:45,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:45,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:45,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192595447] [2020-04-17 14:32:45,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977568451] [2020-04-17 14:32:45,977 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 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 14:32:46,025 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 14:32:46,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:46,027 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:46,027 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:46,043 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:46,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:46,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 14:32:46,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720715095] [2020-04-17 14:32:46,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:46,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:46,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:46,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:46,044 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-04-17 14:32:46,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:46,899 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-04-17 14:32:46,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 14:32:46,900 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 14:32:46,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:46,900 INFO L225 Difference]: With dead ends: 111 [2020-04-17 14:32:46,900 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 14:32:46,901 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:32:46,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 14:32:46,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-04-17 14:32:46,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 14:32:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-04-17 14:32:46,903 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-04-17 14:32:46,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:46,904 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-04-17 14:32:46,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-04-17 14:32:46,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:46,904 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:46,904 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:47,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:47,105 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:47,105 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-04-17 14:32:47,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:47,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535499210] [2020-04-17 14:32:47,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:47,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535499210] [2020-04-17 14:32:47,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474183424] [2020-04-17 14:32:47,242 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 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 14:32:47,304 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 14:32:47,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:47,305 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:32:47,305 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:47,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:47,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:47,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051100169] [2020-04-17 14:32:47,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:47,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:47,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:47,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:47,360 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-04-17 14:32:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:48,115 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-04-17 14:32:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:32:48,116 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:48,116 INFO L225 Difference]: With dead ends: 108 [2020-04-17 14:32:48,116 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 14:32:48,117 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=646, Invalid=1706, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:32:48,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 14:32:48,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-04-17 14:32:48,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 14:32:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-04-17 14:32:48,120 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-04-17 14:32:48,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:48,120 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-04-17 14:32:48,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-04-17 14:32:48,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:48,120 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:48,121 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:48,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:48,324 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:48,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:48,325 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-04-17 14:32:48,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:48,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838752313] [2020-04-17 14:32:48,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:48,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:48,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838752313] [2020-04-17 14:32:48,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491899453] [2020-04-17 14:32:48,511 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 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 14:32:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:48,559 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 14:32:48,560 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:48,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:48,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 14:32:48,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774439845] [2020-04-17 14:32:48,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 14:32:48,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:48,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 14:32:48,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-04-17 14:32:48,574 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-04-17 14:32:49,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:49,199 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-04-17 14:32:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:32:49,201 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 14:32:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:49,202 INFO L225 Difference]: With dead ends: 128 [2020-04-17 14:32:49,202 INFO L226 Difference]: Without dead ends: 122 [2020-04-17 14:32:49,203 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 14:32:49,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-17 14:32:49,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-04-17 14:32:49,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 14:32:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-04-17 14:32:49,204 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-04-17 14:32:49,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:49,204 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-04-17 14:32:49,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 14:32:49,205 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-04-17 14:32:49,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 14:32:49,205 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:49,205 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:49,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:49,406 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:49,406 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-04-17 14:32:49,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:49,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12801547] [2020-04-17 14:32:49,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:49,536 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:49,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12801547] [2020-04-17 14:32:49,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377802531] [2020-04-17 14:32:49,537 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 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 14:32:49,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:49,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:49,589 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:49,589 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:49,615 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:49,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:49,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 14:32:49,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732428101] [2020-04-17 14:32:49,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:49,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:49,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:49,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:49,616 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-04-17 14:32:50,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:50,390 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-04-17 14:32:50,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 14:32:50,391 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 14:32:50,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:50,392 INFO L225 Difference]: With dead ends: 109 [2020-04-17 14:32:50,392 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 14:32:50,392 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 14:32:50,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 14:32:50,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-04-17 14:32:50,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 14:32:50,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-04-17 14:32:50,394 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-04-17 14:32:50,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:50,395 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-04-17 14:32:50,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:50,395 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-04-17 14:32:50,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:50,395 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:50,396 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:50,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:50,596 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:50,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:50,597 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-04-17 14:32:50,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:50,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981020990] [2020-04-17 14:32:50,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:50,782 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:50,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981020990] [2020-04-17 14:32:50,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131759737] [2020-04-17 14:32:50,783 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 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 14:32:50,838 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 14:32:50,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:50,840 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:50,841 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:50,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:50,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 14:32:50,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984984579] [2020-04-17 14:32:50,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:50,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:50,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:50,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:50,849 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-04-17 14:32:51,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:51,222 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-04-17 14:32:51,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:32:51,223 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 14:32:51,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:51,223 INFO L225 Difference]: With dead ends: 124 [2020-04-17 14:32:51,223 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 14:32:51,224 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 14:32:51,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 14:32:51,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-04-17 14:32:51,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:32:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 14:32:51,226 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 14:32:51,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:51,227 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 14:32:51,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 14:32:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:51,227 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:51,227 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:51,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:51,428 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:51,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:51,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-04-17 14:32:51,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:51,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659256721] [2020-04-17 14:32:51,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:51,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:51,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659256721] [2020-04-17 14:32:51,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575331809] [2020-04-17 14:32:51,621 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 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 14:32:51,669 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:51,669 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:51,670 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:51,670 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:51,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:51,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:51,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:32:51,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536260445] [2020-04-17 14:32:51,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:32:51,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:51,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:32:51,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:32:51,711 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 14:32:52,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:52,140 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-04-17 14:32:52,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:32:52,140 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:32:52,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:52,141 INFO L225 Difference]: With dead ends: 121 [2020-04-17 14:32:52,141 INFO L226 Difference]: Without dead ends: 115 [2020-04-17 14:32:52,142 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 14:32:52,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-04-17 14:32:52,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-04-17 14:32:52,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:32:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 14:32:52,144 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 14:32:52,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:52,144 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 14:32:52,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:32:52,144 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 14:32:52,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:52,145 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:52,145 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:52,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:52,349 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:52,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:52,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-04-17 14:32:52,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:52,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385868123] [2020-04-17 14:32:52,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:52,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385868123] [2020-04-17 14:32:52,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796584438] [2020-04-17 14:32:52,532 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 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 14:32:52,588 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 14:32:52,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:52,590 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:52,591 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:52,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:52,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 14:32:52,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707996488] [2020-04-17 14:32:52,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:52,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:52,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:52,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:52,600 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 14:32:53,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:53,000 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-04-17 14:32:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:32:53,001 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 14:32:53,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:53,001 INFO L225 Difference]: With dead ends: 118 [2020-04-17 14:32:53,001 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 14:32:53,002 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 14:32:53,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 14:32:53,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-04-17 14:32:53,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:32:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 14:32:53,005 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 14:32:53,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:53,005 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 14:32:53,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 14:32:53,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:53,006 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:53,006 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:53,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:53,210 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:53,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:53,210 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-04-17 14:32:53,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:53,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526566241] [2020-04-17 14:32:53,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:53,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526566241] [2020-04-17 14:32:53,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381185518] [2020-04-17 14:32:53,434 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 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 14:32:53,487 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 14:32:53,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:53,488 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:53,488 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:53,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:53,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:53,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:32:53,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731293546] [2020-04-17 14:32:53,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:32:53,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:53,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:32:53,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:32:53,512 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 14:32:54,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:54,040 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-04-17 14:32:54,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:32:54,040 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:32:54,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:54,041 INFO L225 Difference]: With dead ends: 117 [2020-04-17 14:32:54,041 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 14:32:54,041 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 14:32:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 14:32:54,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-04-17 14:32:54,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:32:54,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 14:32:54,044 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 14:32:54,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:54,044 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 14:32:54,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:32:54,044 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 14:32:54,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:54,045 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:54,045 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:54,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:54,246 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:54,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:54,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-04-17 14:32:54,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:54,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787975779] [2020-04-17 14:32:54,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:54,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787975779] [2020-04-17 14:32:54,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303297073] [2020-04-17 14:32:54,420 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 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 14:32:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:54,470 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:54,471 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:54,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:54,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 14:32:54,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188035007] [2020-04-17 14:32:54,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:54,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:54,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:54,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:54,480 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 14:32:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:54,938 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-04-17 14:32:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:32:54,938 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 14:32:54,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:54,939 INFO L225 Difference]: With dead ends: 114 [2020-04-17 14:32:54,939 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 14:32:54,940 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 14:32:54,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 14:32:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-04-17 14:32:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:32:54,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 14:32:54,942 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 14:32:54,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:54,942 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 14:32:54,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:54,942 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 14:32:54,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:54,943 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:54,943 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:55,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:55,146 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:55,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:55,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-04-17 14:32:55,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:55,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427137883] [2020-04-17 14:32:55,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:55,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427137883] [2020-04-17 14:32:55,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155960933] [2020-04-17 14:32:55,321 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 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 14:32:55,369 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:32:55,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:55,370 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:55,371 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:55,385 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:55,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:55,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:32:55,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659356155] [2020-04-17 14:32:55,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:32:55,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:55,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:32:55,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:32:55,395 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 14:32:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:55,977 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-04-17 14:32:55,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:32:55,978 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:32:55,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:55,978 INFO L225 Difference]: With dead ends: 113 [2020-04-17 14:32:55,979 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 14:32:55,979 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 14:32:55,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 14:32:55,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-04-17 14:32:55,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:32:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 14:32:55,981 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 14:32:55,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:55,982 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 14:32:55,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:32:55,982 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 14:32:55,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:55,982 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:55,983 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:56,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:56,186 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:56,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:56,186 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-04-17 14:32:56,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:56,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596297281] [2020-04-17 14:32:56,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:56,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596297281] [2020-04-17 14:32:56,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047692206] [2020-04-17 14:32:56,348 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 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 14:32:56,400 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 14:32:56,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:56,402 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:56,403 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:56,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:56,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 14:32:56,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969795063] [2020-04-17 14:32:56,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:56,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:56,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:56,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:56,428 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 14:32:56,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:56,927 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-04-17 14:32:56,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:32:56,928 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 14:32:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:56,929 INFO L225 Difference]: With dead ends: 110 [2020-04-17 14:32:56,929 INFO L226 Difference]: Without dead ends: 104 [2020-04-17 14:32:56,929 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 14:32:56,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-17 14:32:56,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-04-17 14:32:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:32:56,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 14:32:56,932 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 14:32:56,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:56,932 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 14:32:56,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:56,932 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 14:32:56,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:56,933 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:56,933 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:57,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:57,134 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:57,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:57,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-04-17 14:32:57,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:57,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124547326] [2020-04-17 14:32:57,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:57,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124547326] [2020-04-17 14:32:57,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416179583] [2020-04-17 14:32:57,297 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 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 14:32:57,345 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:32:57,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:57,346 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:57,347 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:57,362 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:57,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:57,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:32:57,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397096903] [2020-04-17 14:32:57,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:32:57,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:57,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:32:57,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:32:57,372 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 14:32:58,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:58,036 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-04-17 14:32:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:32:58,036 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:32:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:58,037 INFO L225 Difference]: With dead ends: 109 [2020-04-17 14:32:58,037 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 14:32:58,037 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 14:32:58,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 14:32:58,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-04-17 14:32:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:32:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 14:32:58,040 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 14:32:58,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:58,040 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 14:32:58,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:32:58,040 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 14:32:58,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:58,040 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:58,040 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:58,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:58,241 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:58,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-04-17 14:32:58,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:58,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741155036] [2020-04-17 14:32:58,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:58,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741155036] [2020-04-17 14:32:58,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493753567] [2020-04-17 14:32:58,395 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 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 14:32:58,445 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 14:32:58,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:58,447 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:58,448 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:58,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:58,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 14:32:58,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578148636] [2020-04-17 14:32:58,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:32:58,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:58,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:32:58,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:32:58,475 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 14:32:59,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:32:59,018 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-04-17 14:32:59,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:32:59,018 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 14:32:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:32:59,019 INFO L225 Difference]: With dead ends: 106 [2020-04-17 14:32:59,019 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 14:32:59,020 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 14:32:59,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 14:32:59,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-04-17 14:32:59,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:32:59,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 14:32:59,021 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 14:32:59,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:32:59,022 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 14:32:59,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:32:59,022 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 14:32:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:32:59,022 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:32:59,022 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:32:59,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:32:59,223 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:32:59,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:32:59,223 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-04-17 14:32:59,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:32:59,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040651300] [2020-04-17 14:32:59,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:32:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:32:59,375 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:59,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040651300] [2020-04-17 14:32:59,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430431869] [2020-04-17 14:32:59,376 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 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 14:32:59,431 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 14:32:59,432 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:32:59,433 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:32:59,433 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:32:59,449 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:32:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:32:59,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:32:59,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:32:59,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297456679] [2020-04-17 14:32:59,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:32:59,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:32:59,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:32:59,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:32:59,460 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 14:33:00,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:00,200 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-04-17 14:33:00,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:33:00,201 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:33:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:00,201 INFO L225 Difference]: With dead ends: 105 [2020-04-17 14:33:00,201 INFO L226 Difference]: Without dead ends: 99 [2020-04-17 14:33:00,202 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:33:00,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-04-17 14:33:00,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-04-17 14:33:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:33:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 14:33:00,204 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 14:33:00,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:00,204 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 14:33:00,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 14:33:00,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:33:00,205 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:00,205 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:00,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:00,405 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:00,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:00,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-04-17 14:33:00,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:00,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946483401] [2020-04-17 14:33:00,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:00,573 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:00,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946483401] [2020-04-17 14:33:00,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419925095] [2020-04-17 14:33:00,574 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 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 14:33:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:00,631 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:33:00,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:00,653 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:00,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:00,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 14:33:00,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749093247] [2020-04-17 14:33:00,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:33:00,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:00,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:33:00,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:33:00,654 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 14:33:01,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:01,245 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-04-17 14:33:01,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:33:01,245 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 14:33:01,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:01,246 INFO L225 Difference]: With dead ends: 102 [2020-04-17 14:33:01,246 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 14:33:01,246 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 14:33:01,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 14:33:01,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-04-17 14:33:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:33:01,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 14:33:01,249 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 14:33:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:01,249 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 14:33:01,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:33:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 14:33:01,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:33:01,249 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:01,249 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:01,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:01,450 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:01,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:01,451 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-04-17 14:33:01,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:01,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062055179] [2020-04-17 14:33:01,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:01,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062055179] [2020-04-17 14:33:01,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146117868] [2020-04-17 14:33:01,608 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 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 14:33:01,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:01,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:01,659 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:33:01,660 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:01,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:01,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:01,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:33:01,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118453119] [2020-04-17 14:33:01,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:01,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:01,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:01,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:01,693 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 14:33:02,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:02,474 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-04-17 14:33:02,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:33:02,474 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:33:02,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:02,475 INFO L225 Difference]: With dead ends: 101 [2020-04-17 14:33:02,475 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 14:33:02,476 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 14:33:02,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 14:33:02,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-04-17 14:33:02,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:33:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 14:33:02,478 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 14:33:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:02,478 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 14:33:02,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:02,478 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 14:33:02,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:33:02,479 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:02,479 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:02,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:02,681 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:02,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:02,681 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-04-17 14:33:02,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:02,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732136478] [2020-04-17 14:33:02,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:02,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732136478] [2020-04-17 14:33:02,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811679154] [2020-04-17 14:33:02,823 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 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 14:33:02,882 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 14:33:02,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:02,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:33:02,884 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:02,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:02,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 14:33:02,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606597989] [2020-04-17 14:33:02,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:33:02,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:02,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:33:02,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:33:02,900 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 14:33:03,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:03,555 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-04-17 14:33:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 14:33:03,556 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 14:33:03,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:03,556 INFO L225 Difference]: With dead ends: 98 [2020-04-17 14:33:03,556 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 14:33:03,557 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:33:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 14:33:03,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-04-17 14:33:03,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:33:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 14:33:03,559 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 14:33:03,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:03,559 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 14:33:03,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:33:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 14:33:03,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:33:03,560 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:03,560 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:03,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:03,760 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:03,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:03,761 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-04-17 14:33:03,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:03,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7676635] [2020-04-17 14:33:03,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:03,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7676635] [2020-04-17 14:33:03,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246504538] [2020-04-17 14:33:03,909 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 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 14:33:03,961 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:03,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:03,962 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:33:03,962 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:03,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:03,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:03,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:33:03,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873410905] [2020-04-17 14:33:03,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:03,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:03,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:03,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:03,989 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 14:33:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:05,102 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-04-17 14:33:05,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 14:33:05,103 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:33:05,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:05,103 INFO L225 Difference]: With dead ends: 97 [2020-04-17 14:33:05,103 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 14:33:05,104 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 14:33:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 14:33:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-04-17 14:33:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:33:05,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 14:33:05,106 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 14:33:05,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:05,106 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 14:33:05,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:05,106 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 14:33:05,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:33:05,107 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:05,107 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:05,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:05,310 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:05,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:05,310 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-04-17 14:33:05,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:05,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057614689] [2020-04-17 14:33:05,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:05,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057614689] [2020-04-17 14:33:05,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843903183] [2020-04-17 14:33:05,451 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 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 14:33:05,502 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 14:33:05,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:05,504 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:33:05,504 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:05,517 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:05,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:05,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 14:33:05,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582487809] [2020-04-17 14:33:05,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 14:33:05,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:05,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 14:33:05,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-04-17 14:33:05,518 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 14:33:06,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:06,197 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-04-17 14:33:06,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:33:06,197 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 14:33:06,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:06,198 INFO L225 Difference]: With dead ends: 113 [2020-04-17 14:33:06,198 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 14:33:06,199 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 14:33:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 14:33:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-04-17 14:33:06,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-04-17 14:33:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-04-17 14:33:06,201 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-04-17 14:33:06,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:06,202 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-04-17 14:33:06,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 14:33:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-04-17 14:33:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:33:06,202 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:06,202 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:06,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:06,403 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:06,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:06,404 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-04-17 14:33:06,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:06,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016204901] [2020-04-17 14:33:06,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:06,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016204901] [2020-04-17 14:33:06,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932928354] [2020-04-17 14:33:06,558 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 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 14:33:06,611 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 14:33:06,612 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:06,613 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:06,613 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:06,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:06,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:33:06,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463528806] [2020-04-17 14:33:06,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:06,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:06,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:06,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:06,640 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-04-17 14:33:07,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:07,444 INFO L93 Difference]: Finished difference Result 92 states and 229 transitions. [2020-04-17 14:33:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 14:33:07,445 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:33:07,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:07,446 INFO L225 Difference]: With dead ends: 92 [2020-04-17 14:33:07,446 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 14:33:07,446 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 14:33:07,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 14:33:07,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-04-17 14:33:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 14:33:07,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-04-17 14:33:07,448 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-04-17 14:33:07,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:07,449 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-04-17 14:33:07,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:07,449 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-04-17 14:33:07,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 14:33:07,449 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:07,450 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:07,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:07,650 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:07,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:07,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-04-17 14:33:07,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:07,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507475276] [2020-04-17 14:33:07,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:07,830 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:07,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507475276] [2020-04-17 14:33:07,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991251723] [2020-04-17 14:33:07,831 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 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 14:33:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:07,881 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 14:33:07,881 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:07,898 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:07,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:07,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 14:33:07,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616166566] [2020-04-17 14:33:07,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:07,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:07,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:07,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:07,911 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-04-17 14:33:08,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:08,743 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-04-17 14:33:08,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:33:08,744 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 14:33:08,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:08,744 INFO L225 Difference]: With dead ends: 108 [2020-04-17 14:33:08,745 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 14:33:08,745 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 14:33:08,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 14:33:08,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-04-17 14:33:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 14:33:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-04-17 14:33:08,747 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-04-17 14:33:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:08,748 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-04-17 14:33:08,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-04-17 14:33:08,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:08,749 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:08,749 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:08,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:08,953 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:08,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:08,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-04-17 14:33:08,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:08,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62243880] [2020-04-17 14:33:08,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:09,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62243880] [2020-04-17 14:33:09,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921861565] [2020-04-17 14:33:09,110 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 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 14:33:09,161 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:09,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:09,163 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:09,163 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:09,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:09,192 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:09,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:09,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:09,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140916996] [2020-04-17 14:33:09,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:09,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:09,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:09,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:09,194 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-04-17 14:33:10,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:10,081 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-04-17 14:33:10,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:33:10,081 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:10,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:10,082 INFO L225 Difference]: With dead ends: 90 [2020-04-17 14:33:10,082 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 14:33:10,083 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 14:33:10,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 14:33:10,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-04-17 14:33:10,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 14:33:10,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-04-17 14:33:10,085 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-04-17 14:33:10,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:10,085 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-04-17 14:33:10,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:10,085 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-04-17 14:33:10,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:10,085 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:10,085 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:10,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:10,286 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:10,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:10,286 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-04-17 14:33:10,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:10,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801319806] [2020-04-17 14:33:10,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:10,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801319806] [2020-04-17 14:33:10,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061911471] [2020-04-17 14:33:10,491 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 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 14:33:10,549 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 14:33:10,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:10,550 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:10,551 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:10,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:10,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:10,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681868737] [2020-04-17 14:33:10,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:10,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:10,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:10,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:10,558 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-04-17 14:33:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:10,887 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-04-17 14:33:10,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 14:33:10,887 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:10,888 INFO L225 Difference]: With dead ends: 96 [2020-04-17 14:33:10,888 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 14:33:10,889 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 14:33:10,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 14:33:10,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-04-17 14:33:10,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 14:33:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-04-17 14:33:10,891 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-04-17 14:33:10,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:10,891 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-04-17 14:33:10,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:10,891 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-04-17 14:33:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:10,892 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:10,892 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:11,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:11,093 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:11,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:11,093 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-04-17 14:33:11,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:11,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554757800] [2020-04-17 14:33:11,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:11,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554757800] [2020-04-17 14:33:11,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616212985] [2020-04-17 14:33:11,303 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 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 14:33:11,353 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:11,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:11,354 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:11,355 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:11,369 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:11,377 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:11,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:11,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:11,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441599572] [2020-04-17 14:33:11,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:11,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:11,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:11,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:11,378 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-04-17 14:33:11,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:11,804 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-04-17 14:33:11,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 14:33:11,805 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:11,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:11,805 INFO L225 Difference]: With dead ends: 114 [2020-04-17 14:33:11,805 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 14:33:11,806 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 14:33:11,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 14:33:11,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-04-17 14:33:11,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 14:33:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-04-17 14:33:11,807 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-04-17 14:33:11,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:11,808 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-04-17 14:33:11,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:11,808 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-04-17 14:33:11,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:11,808 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:11,808 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:12,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:12,009 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:12,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:12,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-04-17 14:33:12,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:12,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762885453] [2020-04-17 14:33:12,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:12,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762885453] [2020-04-17 14:33:12,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56925725] [2020-04-17 14:33:12,212 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 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 14:33:12,268 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 14:33:12,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:12,269 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:12,270 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:12,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:12,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:12,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528773538] [2020-04-17 14:33:12,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:12,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:12,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:12,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:12,281 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-04-17 14:33:12,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:12,721 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-04-17 14:33:12,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:33:12,721 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:12,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:12,722 INFO L225 Difference]: With dead ends: 115 [2020-04-17 14:33:12,722 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 14:33:12,723 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 14:33:12,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 14:33:12,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-04-17 14:33:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 14:33:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-04-17 14:33:12,725 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-04-17 14:33:12,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:12,725 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-04-17 14:33:12,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:12,725 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-04-17 14:33:12,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:12,726 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:12,726 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:12,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:12,927 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:12,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:12,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-04-17 14:33:12,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:12,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118520254] [2020-04-17 14:33:12,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:13,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118520254] [2020-04-17 14:33:13,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933248170] [2020-04-17 14:33:13,145 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 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 14:33:13,199 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 14:33:13,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:13,200 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:13,201 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:13,220 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:13,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:13,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:13,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886462447] [2020-04-17 14:33:13,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:13,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:13,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:13,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:13,229 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-04-17 14:33:13,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:13,730 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-04-17 14:33:13,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:33:13,731 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:13,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:13,732 INFO L225 Difference]: With dead ends: 129 [2020-04-17 14:33:13,732 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 14:33:13,733 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 14:33:13,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 14:33:13,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-04-17 14:33:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 14:33:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-04-17 14:33:13,736 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-04-17 14:33:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:13,736 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-04-17 14:33:13,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-04-17 14:33:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:13,737 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:13,737 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:13,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:13,938 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:13,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:13,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-04-17 14:33:13,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:13,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814230472] [2020-04-17 14:33:13,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:14,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814230472] [2020-04-17 14:33:14,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579442678] [2020-04-17 14:33:14,129 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 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 14:33:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:14,178 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:14,179 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:14,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:14,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:14,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094147190] [2020-04-17 14:33:14,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:14,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:14,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:14,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:14,188 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-04-17 14:33:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:14,646 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-04-17 14:33:14,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:33:14,646 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:14,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:14,647 INFO L225 Difference]: With dead ends: 129 [2020-04-17 14:33:14,647 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 14:33:14,648 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 14:33:14,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 14:33:14,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-04-17 14:33:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-17 14:33:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-04-17 14:33:14,650 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-04-17 14:33:14,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:14,650 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-04-17 14:33:14,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:14,650 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-04-17 14:33:14,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:14,651 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:14,651 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:14,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:14,852 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:14,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:14,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-04-17 14:33:14,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:14,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589114476] [2020-04-17 14:33:14,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:15,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589114476] [2020-04-17 14:33:15,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290730702] [2020-04-17 14:33:15,046 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 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 14:33:15,098 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:15,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:15,100 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:15,100 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:15,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:15,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:15,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:15,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850336693] [2020-04-17 14:33:15,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:15,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:15,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:15,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:15,129 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-04-17 14:33:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:15,679 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-04-17 14:33:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:33:15,680 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:15,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:15,681 INFO L225 Difference]: With dead ends: 126 [2020-04-17 14:33:15,681 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 14:33:15,681 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 14:33:15,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 14:33:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-04-17 14:33:15,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 14:33:15,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-04-17 14:33:15,684 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-04-17 14:33:15,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:15,685 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-04-17 14:33:15,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:15,685 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-04-17 14:33:15,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:15,685 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:15,685 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:15,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:15,889 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:15,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:15,889 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-04-17 14:33:15,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:15,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754789989] [2020-04-17 14:33:15,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:16,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754789989] [2020-04-17 14:33:16,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377839506] [2020-04-17 14:33:16,073 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 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 14:33:16,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 14:33:16,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:16,132 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:16,133 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:16,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:16,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:16,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814807406] [2020-04-17 14:33:16,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:16,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:16,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:16,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:16,144 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-04-17 14:33:16,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:16,690 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-04-17 14:33:16,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:33:16,690 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:16,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:16,691 INFO L225 Difference]: With dead ends: 127 [2020-04-17 14:33:16,691 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 14:33:16,691 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 14:33:16,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 14:33:16,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-04-17 14:33:16,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:33:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-04-17 14:33:16,694 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-04-17 14:33:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:16,694 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-04-17 14:33:16,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:16,694 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-04-17 14:33:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:16,695 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:16,695 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:16,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:16,896 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:16,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:16,896 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-04-17 14:33:16,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:16,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921852324] [2020-04-17 14:33:16,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:17,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921852324] [2020-04-17 14:33:17,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318378548] [2020-04-17 14:33:17,085 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 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 14:33:17,132 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:17,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:17,133 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:17,133 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:17,150 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:17,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:17,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:17,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979306577] [2020-04-17 14:33:17,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:17,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:17,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:17,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:17,160 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-04-17 14:33:17,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:17,807 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-04-17 14:33:17,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:33:17,807 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:17,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:17,808 INFO L225 Difference]: With dead ends: 124 [2020-04-17 14:33:17,808 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 14:33:17,808 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 14:33:17,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 14:33:17,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-04-17 14:33:17,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:33:17,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-04-17 14:33:17,811 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-04-17 14:33:17,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:17,811 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-04-17 14:33:17,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:17,811 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-04-17 14:33:17,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:17,812 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:17,812 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:18,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:18,012 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:18,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-04-17 14:33:18,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:18,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738587270] [2020-04-17 14:33:18,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:18,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738587270] [2020-04-17 14:33:18,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014163377] [2020-04-17 14:33:18,214 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 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 14:33:18,271 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 14:33:18,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:18,273 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:18,274 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:18,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:18,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:18,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71301324] [2020-04-17 14:33:18,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:18,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:18,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:18,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:18,294 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-04-17 14:33:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:18,983 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-04-17 14:33:18,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:33:18,984 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:18,985 INFO L225 Difference]: With dead ends: 125 [2020-04-17 14:33:18,985 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 14:33:18,985 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:33:18,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 14:33:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-04-17 14:33:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 14:33:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-04-17 14:33:18,989 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-04-17 14:33:18,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:18,989 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-04-17 14:33:18,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:18,989 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-04-17 14:33:18,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:18,990 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:18,990 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:19,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:19,194 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:19,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:19,195 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-04-17 14:33:19,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:19,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388726239] [2020-04-17 14:33:19,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:19,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388726239] [2020-04-17 14:33:19,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81535063] [2020-04-17 14:33:19,529 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 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 14:33:19,628 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 14:33:19,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:19,630 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:19,631 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:19,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:19,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:19,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:19,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651683126] [2020-04-17 14:33:19,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:19,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:19,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:19,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:19,681 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-04-17 14:33:20,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:20,802 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-04-17 14:33:20,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:33:20,803 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:20,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:20,804 INFO L225 Difference]: With dead ends: 122 [2020-04-17 14:33:20,804 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 14:33:20,804 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:33:20,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 14:33:20,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-04-17 14:33:20,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 14:33:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-04-17 14:33:20,814 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-04-17 14:33:20,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:20,814 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-04-17 14:33:20,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-04-17 14:33:20,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:20,815 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:20,815 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:21,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:21,020 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:21,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-04-17 14:33:21,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:21,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239393950] [2020-04-17 14:33:21,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:21,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239393950] [2020-04-17 14:33:21,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884356634] [2020-04-17 14:33:21,339 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 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 14:33:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:21,420 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:21,422 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:21,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:21,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:21,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164162946] [2020-04-17 14:33:21,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:21,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:21,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:21,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:21,447 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-04-17 14:33:22,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:22,336 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-04-17 14:33:22,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 14:33:22,336 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:22,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:22,337 INFO L225 Difference]: With dead ends: 123 [2020-04-17 14:33:22,337 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 14:33:22,337 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 14:33:22,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 14:33:22,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-04-17 14:33:22,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 14:33:22,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-04-17 14:33:22,339 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-04-17 14:33:22,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:22,339 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-04-17 14:33:22,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:22,340 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-04-17 14:33:22,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:22,340 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:22,340 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:22,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:22,541 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:22,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-04-17 14:33:22,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:22,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257193551] [2020-04-17 14:33:22,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:22,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257193551] [2020-04-17 14:33:22,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159773719] [2020-04-17 14:33:22,744 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 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 14:33:22,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:22,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:22,796 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:22,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:22,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:22,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:22,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:22,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579909499] [2020-04-17 14:33:22,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:22,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:22,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:22,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:22,832 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-04-17 14:33:23,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:23,604 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-04-17 14:33:23,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:33:23,604 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:23,605 INFO L225 Difference]: With dead ends: 120 [2020-04-17 14:33:23,605 INFO L226 Difference]: Without dead ends: 114 [2020-04-17 14:33:23,606 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 14:33:23,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-17 14:33:23,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-04-17 14:33:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 14:33:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-04-17 14:33:23,608 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-04-17 14:33:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:23,609 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-04-17 14:33:23,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-04-17 14:33:23,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:23,609 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:23,609 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:23,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:23,810 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:23,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:23,811 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-04-17 14:33:23,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:23,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444599744] [2020-04-17 14:33:23,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:23,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444599744] [2020-04-17 14:33:23,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830100272] [2020-04-17 14:33:23,971 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 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 14:33:24,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 14:33:24,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:24,027 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:24,028 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:24,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:24,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:24,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833231943] [2020-04-17 14:33:24,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:24,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:24,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:24,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:24,040 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-04-17 14:33:24,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:24,697 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-04-17 14:33:24,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:33:24,698 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:24,698 INFO L225 Difference]: With dead ends: 121 [2020-04-17 14:33:24,698 INFO L226 Difference]: Without dead ends: 115 [2020-04-17 14:33:24,699 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 14:33:24,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-04-17 14:33:24,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-04-17 14:33:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:33:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 14:33:24,701 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-04-17 14:33:24,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:24,702 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 14:33:24,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:24,702 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 14:33:24,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:24,702 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:24,702 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:24,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:24,903 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:24,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:24,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-04-17 14:33:24,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:24,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397570456] [2020-04-17 14:33:24,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:25,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397570456] [2020-04-17 14:33:25,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226165501] [2020-04-17 14:33:25,071 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 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 14:33:25,118 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:25,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:25,119 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:25,120 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:25,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:25,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:25,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:25,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234715681] [2020-04-17 14:33:25,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:25,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:25,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:25,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:25,146 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-04-17 14:33:25,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:25,989 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-04-17 14:33:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 14:33:25,990 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:25,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:25,990 INFO L225 Difference]: With dead ends: 118 [2020-04-17 14:33:25,991 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 14:33:25,991 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 14:33:25,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 14:33:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-04-17 14:33:25,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:33:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 14:33:25,994 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-04-17 14:33:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:25,994 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 14:33:25,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 14:33:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:25,994 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:25,994 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:26,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:26,195 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:26,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-04-17 14:33:26,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:26,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379635256] [2020-04-17 14:33:26,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:26,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379635256] [2020-04-17 14:33:26,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430835824] [2020-04-17 14:33:26,358 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 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 14:33:26,412 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 14:33:26,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:26,414 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:26,414 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:26,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:26,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:26,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015642209] [2020-04-17 14:33:26,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:26,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:26,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:26,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:26,436 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-04-17 14:33:27,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:27,153 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-04-17 14:33:27,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 14:33:27,153 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:27,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:27,154 INFO L225 Difference]: With dead ends: 119 [2020-04-17 14:33:27,154 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 14:33:27,155 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 14:33:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 14:33:27,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-04-17 14:33:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 14:33:27,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-04-17 14:33:27,158 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-04-17 14:33:27,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:27,158 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-04-17 14:33:27,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:27,159 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-04-17 14:33:27,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:27,159 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:27,159 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:27,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:27,363 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:27,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:27,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-04-17 14:33:27,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:27,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223206939] [2020-04-17 14:33:27,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:27,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:27,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223206939] [2020-04-17 14:33:27,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323160876] [2020-04-17 14:33:27,516 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 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 14:33:27,574 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 14:33:27,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:27,576 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:27,576 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:27,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:27,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:27,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:27,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029453390] [2020-04-17 14:33:27,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:27,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:27,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:27,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:27,604 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-04-17 14:33:28,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:28,507 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-04-17 14:33:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 14:33:28,508 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:28,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:28,509 INFO L225 Difference]: With dead ends: 116 [2020-04-17 14:33:28,509 INFO L226 Difference]: Without dead ends: 110 [2020-04-17 14:33:28,509 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 14:33:28,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-17 14:33:28,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-04-17 14:33:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 14:33:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-04-17 14:33:28,512 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-04-17 14:33:28,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:28,512 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-04-17 14:33:28,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:28,512 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-04-17 14:33:28,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:28,513 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:28,513 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:28,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:28,713 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:28,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:28,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-04-17 14:33:28,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:28,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448977027] [2020-04-17 14:33:28,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:28,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448977027] [2020-04-17 14:33:28,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650088517] [2020-04-17 14:33:28,880 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 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 14:33:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:28,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 14:33:28,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:28,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:28,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 14:33:28,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120239499] [2020-04-17 14:33:28,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 14:33:28,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:28,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 14:33:28,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-04-17 14:33:28,946 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-04-17 14:33:29,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:29,709 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-04-17 14:33:29,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 14:33:29,709 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 14:33:29,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:29,710 INFO L225 Difference]: With dead ends: 136 [2020-04-17 14:33:29,710 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 14:33:29,711 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 14:33:29,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 14:33:29,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-04-17 14:33:29,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 14:33:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-04-17 14:33:29,714 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-04-17 14:33:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:29,714 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-04-17 14:33:29,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 14:33:29,714 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-04-17 14:33:29,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 14:33:29,715 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:29,715 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:29,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:29,918 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:29,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:29,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-04-17 14:33:29,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:29,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741940934] [2020-04-17 14:33:29,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:30,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741940934] [2020-04-17 14:33:30,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106794873] [2020-04-17 14:33:30,076 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 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 14:33:30,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:30,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:30,127 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:30,128 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:30,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:30,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 14:33:30,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489330921] [2020-04-17 14:33:30,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:30,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:30,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:30,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:30,156 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-04-17 14:33:31,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:31,057 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-04-17 14:33:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 14:33:31,057 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 14:33:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:31,058 INFO L225 Difference]: With dead ends: 117 [2020-04-17 14:33:31,058 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 14:33:31,059 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=910, Invalid=2282, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 14:33:31,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 14:33:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-04-17 14:33:31,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-04-17 14:33:31,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-04-17 14:33:31,061 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-04-17 14:33:31,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:31,061 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-04-17 14:33:31,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-04-17 14:33:31,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:31,062 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:31,062 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:31,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:31,263 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:31,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:31,263 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-04-17 14:33:31,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:31,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532650857] [2020-04-17 14:33:31,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:31,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532650857] [2020-04-17 14:33:31,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209936931] [2020-04-17 14:33:31,487 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 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 14:33:31,546 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 14:33:31,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:31,548 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:31,549 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:31,557 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:31,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:31,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:31,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727496578] [2020-04-17 14:33:31,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:31,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:31,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:31,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:31,558 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-04-17 14:33:31,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:31,964 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-04-17 14:33:31,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:33:31,965 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:31,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:31,965 INFO L225 Difference]: With dead ends: 134 [2020-04-17 14:33:31,966 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 14:33:31,966 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 14:33:31,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 14:33:31,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-04-17 14:33:31,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:33:31,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:33:31,969 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 14:33:31,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:31,969 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:33:31,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:31,969 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:33:31,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:31,969 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:31,969 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:32,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:32,171 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:32,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:32,172 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-04-17 14:33:32,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:32,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883234545] [2020-04-17 14:33:32,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:32,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883234545] [2020-04-17 14:33:32,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905445851] [2020-04-17 14:33:32,409 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 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 14:33:32,458 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:32,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:32,460 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:32,460 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:32,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:32,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:32,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:32,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906810633] [2020-04-17 14:33:32,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:32,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:32,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:32,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:32,485 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 14:33:32,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:32,938 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-04-17 14:33:32,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:33:32,938 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:32,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:32,939 INFO L225 Difference]: With dead ends: 131 [2020-04-17 14:33:32,939 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 14:33:32,939 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 14:33:32,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 14:33:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-04-17 14:33:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:33:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:33:32,942 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 14:33:32,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:32,942 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:33:32,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:32,942 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:33:32,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:32,942 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:32,942 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:33,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:33,143 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:33,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:33,144 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-04-17 14:33:33,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:33,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463833634] [2020-04-17 14:33:33,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:33,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463833634] [2020-04-17 14:33:33,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464121399] [2020-04-17 14:33:33,365 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 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 14:33:33,417 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 14:33:33,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:33,419 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:33,420 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:33,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:33,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:33,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227743536] [2020-04-17 14:33:33,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:33,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:33,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:33,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:33,437 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 14:33:33,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:33,920 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-04-17 14:33:33,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:33:33,921 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:33,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:33,922 INFO L225 Difference]: With dead ends: 128 [2020-04-17 14:33:33,922 INFO L226 Difference]: Without dead ends: 122 [2020-04-17 14:33:33,922 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 14:33:33,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-17 14:33:33,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-04-17 14:33:33,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:33:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:33:33,925 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 14:33:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:33,925 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:33:33,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:33,925 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:33:33,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:33,925 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:33,925 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:34,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:34,126 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:34,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:34,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-04-17 14:33:34,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:34,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10417424] [2020-04-17 14:33:34,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:34,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10417424] [2020-04-17 14:33:34,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656750624] [2020-04-17 14:33:34,354 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 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 14:33:34,409 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 14:33:34,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:34,410 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:34,411 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:34,426 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:34,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:34,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:34,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007303900] [2020-04-17 14:33:34,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:34,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:34,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:34,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:34,435 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 14:33:35,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:35,020 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-04-17 14:33:35,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:33:35,021 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:35,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:35,021 INFO L225 Difference]: With dead ends: 127 [2020-04-17 14:33:35,022 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 14:33:35,022 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 14:33:35,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 14:33:35,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-04-17 14:33:35,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:33:35,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:33:35,024 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 14:33:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:35,024 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:33:35,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:33:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:35,025 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:35,025 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:35,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:35,225 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:35,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:35,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-04-17 14:33:35,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:35,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841285009] [2020-04-17 14:33:35,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:35,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841285009] [2020-04-17 14:33:35,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488975589] [2020-04-17 14:33:35,426 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 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 14:33:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:35,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:35,480 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:35,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:35,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:35,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552100726] [2020-04-17 14:33:35,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:35,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:35,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:35,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:35,515 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 14:33:36,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:36,038 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-04-17 14:33:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:33:36,038 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:36,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:36,039 INFO L225 Difference]: With dead ends: 124 [2020-04-17 14:33:36,039 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 14:33:36,039 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 14:33:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 14:33:36,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-04-17 14:33:36,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:33:36,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:33:36,041 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 14:33:36,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:36,042 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:33:36,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:36,042 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:33:36,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:36,042 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:36,042 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:36,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:36,243 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:36,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:36,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-04-17 14:33:36,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:36,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173995437] [2020-04-17 14:33:36,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:36,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173995437] [2020-04-17 14:33:36,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428829572] [2020-04-17 14:33:36,454 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 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 14:33:36,504 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:36,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:36,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:36,506 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:36,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:36,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:36,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:36,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640188731] [2020-04-17 14:33:36,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:36,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:36,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:36,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:36,533 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 14:33:37,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:37,206 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-04-17 14:33:37,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:33:37,206 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:37,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:37,207 INFO L225 Difference]: With dead ends: 123 [2020-04-17 14:33:37,207 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 14:33:37,208 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:33:37,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 14:33:37,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-04-17 14:33:37,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:33:37,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:33:37,211 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 14:33:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:37,211 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:33:37,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:33:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:37,212 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:37,212 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:37,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:37,413 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:37,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:37,413 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-04-17 14:33:37,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:37,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218705055] [2020-04-17 14:33:37,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:37,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218705055] [2020-04-17 14:33:37,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233041937] [2020-04-17 14:33:37,608 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 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 14:33:37,665 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 14:33:37,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:37,666 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:37,666 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:37,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:37,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:37,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570122737] [2020-04-17 14:33:37,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:37,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:37,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:37,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:37,678 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 14:33:38,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:38,243 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-04-17 14:33:38,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:33:38,244 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:38,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:38,245 INFO L225 Difference]: With dead ends: 120 [2020-04-17 14:33:38,245 INFO L226 Difference]: Without dead ends: 114 [2020-04-17 14:33:38,245 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 14:33:38,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-17 14:33:38,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-04-17 14:33:38,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:33:38,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:33:38,248 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 14:33:38,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:38,248 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:33:38,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:38,248 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:33:38,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:38,248 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:38,248 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:38,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:38,449 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:38,450 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-04-17 14:33:38,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:38,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288934385] [2020-04-17 14:33:38,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:38,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288934385] [2020-04-17 14:33:38,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204896663] [2020-04-17 14:33:38,655 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 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 14:33:38,706 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:38,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:38,707 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:38,708 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:38,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:38,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:38,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:38,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602570579] [2020-04-17 14:33:38,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:38,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:38,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:38,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:38,777 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 14:33:39,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:39,710 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-04-17 14:33:39,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:33:39,711 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:39,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:39,712 INFO L225 Difference]: With dead ends: 119 [2020-04-17 14:33:39,712 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 14:33:39,713 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 14:33:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 14:33:39,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-04-17 14:33:39,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:33:39,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:33:39,716 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 14:33:39,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:39,716 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:33:39,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:39,717 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:33:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:39,717 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:39,718 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:39,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:39,922 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:39,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:39,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-04-17 14:33:39,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:39,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976191765] [2020-04-17 14:33:39,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:40,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976191765] [2020-04-17 14:33:40,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972364686] [2020-04-17 14:33:40,108 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 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 14:33:40,166 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 14:33:40,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:40,168 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:40,169 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:40,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:40,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:40,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795534278] [2020-04-17 14:33:40,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:40,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:40,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:40,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:40,188 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 14:33:40,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:40,808 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-04-17 14:33:40,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:33:40,809 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:40,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:40,810 INFO L225 Difference]: With dead ends: 116 [2020-04-17 14:33:40,810 INFO L226 Difference]: Without dead ends: 110 [2020-04-17 14:33:40,810 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:33:40,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-17 14:33:40,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-04-17 14:33:40,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:33:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:33:40,813 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 14:33:40,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:40,813 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:33:40,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:40,813 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:33:40,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:40,813 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:40,813 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:41,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:41,014 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:41,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:41,015 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-04-17 14:33:41,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:41,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641122688] [2020-04-17 14:33:41,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:41,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641122688] [2020-04-17 14:33:41,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196206647] [2020-04-17 14:33:41,219 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 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 14:33:41,277 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 14:33:41,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:41,279 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:41,280 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:41,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:41,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:41,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:41,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327170094] [2020-04-17 14:33:41,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:41,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:41,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:41,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:41,308 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 14:33:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:42,096 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-04-17 14:33:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:33:42,096 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:42,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:42,097 INFO L225 Difference]: With dead ends: 115 [2020-04-17 14:33:42,097 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 14:33:42,098 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 14:33:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 14:33:42,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-04-17 14:33:42,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:33:42,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:33:42,101 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 14:33:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:42,101 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:33:42,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:42,101 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:33:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:42,102 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:42,102 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:42,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:42,302 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:42,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:42,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-04-17 14:33:42,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:42,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858812185] [2020-04-17 14:33:42,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:42,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858812185] [2020-04-17 14:33:42,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292890346] [2020-04-17 14:33:42,491 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 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 14:33:42,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:42,539 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:42,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:42,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:42,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:42,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700547225] [2020-04-17 14:33:42,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:42,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:42,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:42,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:42,551 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 14:33:43,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:43,210 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-04-17 14:33:43,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 14:33:43,210 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:43,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:43,211 INFO L225 Difference]: With dead ends: 112 [2020-04-17 14:33:43,211 INFO L226 Difference]: Without dead ends: 106 [2020-04-17 14:33:43,212 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 14:33:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-04-17 14:33:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-04-17 14:33:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:33:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:33:43,214 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 14:33:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:43,214 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:33:43,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:33:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:43,215 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:43,215 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:43,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:43,416 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-04-17 14:33:43,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:43,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903077652] [2020-04-17 14:33:43,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:43,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903077652] [2020-04-17 14:33:43,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842761093] [2020-04-17 14:33:43,600 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:43,653 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:43,653 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:43,654 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:43,654 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:43,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:43,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:43,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:43,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66125783] [2020-04-17 14:33:43,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:43,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:43,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:43,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:43,686 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 14:33:44,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:44,547 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-04-17 14:33:44,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 14:33:44,547 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:44,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:44,548 INFO L225 Difference]: With dead ends: 111 [2020-04-17 14:33:44,548 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 14:33:44,548 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 14:33:44,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 14:33:44,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-04-17 14:33:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:33:44,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:33:44,551 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 14:33:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:44,551 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:33:44,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:33:44,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:44,552 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:44,552 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:44,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:44,755 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:44,756 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-04-17 14:33:44,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:44,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831561036] [2020-04-17 14:33:44,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:44,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831561036] [2020-04-17 14:33:44,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147424002] [2020-04-17 14:33:44,931 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:44,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 14:33:44,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:44,991 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:44,991 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:45,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:45,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:45,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331982373] [2020-04-17 14:33:45,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:45,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:45,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:45,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:45,004 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 14:33:45,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:45,710 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-04-17 14:33:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:33:45,711 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:45,712 INFO L225 Difference]: With dead ends: 108 [2020-04-17 14:33:45,712 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 14:33:45,712 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 14:33:45,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 14:33:45,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-04-17 14:33:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:33:45,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:33:45,715 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 14:33:45,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:45,715 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:33:45,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:45,715 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:33:45,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:45,715 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:45,716 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:45,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:45,917 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:45,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:45,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-04-17 14:33:45,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:45,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782704760] [2020-04-17 14:33:45,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:46,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782704760] [2020-04-17 14:33:46,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053167157] [2020-04-17 14:33:46,097 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:46,148 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:46,148 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:46,149 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:46,149 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:46,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:46,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:46,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:46,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993438300] [2020-04-17 14:33:46,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:46,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:46,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:46,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:46,176 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 14:33:47,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:47,113 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-04-17 14:33:47,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 14:33:47,113 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:47,114 INFO L225 Difference]: With dead ends: 107 [2020-04-17 14:33:47,114 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 14:33:47,115 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 14:33:47,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 14:33:47,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-04-17 14:33:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:33:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:33:47,117 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 14:33:47,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:47,117 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:33:47,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:47,118 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:33:47,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:47,118 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:47,118 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:47,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:47,321 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:47,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:47,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-04-17 14:33:47,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:47,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480712653] [2020-04-17 14:33:47,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:47,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480712653] [2020-04-17 14:33:47,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414453162] [2020-04-17 14:33:47,492 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:47,548 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 14:33:47,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:47,550 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:47,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:47,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:47,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:47,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664440796] [2020-04-17 14:33:47,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:47,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:47,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:47,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:47,568 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 14:33:48,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:48,328 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-04-17 14:33:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 14:33:48,328 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:48,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:48,329 INFO L225 Difference]: With dead ends: 104 [2020-04-17 14:33:48,329 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 14:33:48,329 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 14:33:48,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 14:33:48,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-04-17 14:33:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:33:48,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:33:48,332 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 14:33:48,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:48,332 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:33:48,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:48,332 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:33:48,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:48,333 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:48,333 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:48,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:48,533 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:48,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:48,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-04-17 14:33:48,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:48,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391249167] [2020-04-17 14:33:48,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:48,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:48,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391249167] [2020-04-17 14:33:48,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907345794] [2020-04-17 14:33:48,698 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:48,770 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 14:33:48,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:48,771 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:48,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:48,788 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:48,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:48,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:48,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900626383] [2020-04-17 14:33:48,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:48,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:48,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:48,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:48,803 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 14:33:49,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:49,820 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-04-17 14:33:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 14:33:49,821 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:49,821 INFO L225 Difference]: With dead ends: 103 [2020-04-17 14:33:49,822 INFO L226 Difference]: Without dead ends: 97 [2020-04-17 14:33:49,822 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 14:33:49,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-04-17 14:33:49,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-04-17 14:33:49,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:33:49,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:33:49,824 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 14:33:49,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:49,825 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:33:49,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:49,825 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:33:49,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:49,825 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:49,825 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:50,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:50,026 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:50,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:50,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-04-17 14:33:50,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:50,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127759045] [2020-04-17 14:33:50,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:50,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127759045] [2020-04-17 14:33:50,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828167831] [2020-04-17 14:33:50,190 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:50,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:50,246 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:50,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:50,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 14:33:50,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639144767] [2020-04-17 14:33:50,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 14:33:50,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:50,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 14:33:50,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-04-17 14:33:50,261 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 14:33:51,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:51,052 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-04-17 14:33:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 14:33:51,052 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 14:33:51,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:51,053 INFO L225 Difference]: With dead ends: 119 [2020-04-17 14:33:51,053 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 14:33:51,054 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 14:33:51,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 14:33:51,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-04-17 14:33:51,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-04-17 14:33:51,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-04-17 14:33:51,056 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-04-17 14:33:51,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:51,056 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-04-17 14:33:51,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 14:33:51,057 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-04-17 14:33:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:51,057 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:51,057 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:51,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:51,258 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:51,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:51,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-04-17 14:33:51,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:51,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332090090] [2020-04-17 14:33:51,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:51,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332090090] [2020-04-17 14:33:51,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257550248] [2020-04-17 14:33:51,430 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:51,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:51,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:51,480 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:51,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:51,496 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:51,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:51,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:51,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759347017] [2020-04-17 14:33:51,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:51,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:51,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:51,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:51,511 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-04-17 14:33:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:52,551 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-04-17 14:33:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 14:33:52,552 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:52,552 INFO L225 Difference]: With dead ends: 100 [2020-04-17 14:33:52,552 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 14:33:52,553 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 14:33:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 14:33:52,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-04-17 14:33:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-17 14:33:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-04-17 14:33:52,555 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-04-17 14:33:52,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:52,555 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-04-17 14:33:52,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:52,555 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-04-17 14:33:52,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 14:33:52,556 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:52,556 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:52,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:52,757 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:52,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-04-17 14:33:52,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:52,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252280161] [2020-04-17 14:33:52,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:52,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252280161] [2020-04-17 14:33:52,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123297203] [2020-04-17 14:33:52,932 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:52,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 14:33:52,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:52,990 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 14:33:52,991 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:53,007 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:53,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:53,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 14:33:53,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563712456] [2020-04-17 14:33:53,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:53,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:53,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:53,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:53,022 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-04-17 14:33:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:53,994 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-04-17 14:33:53,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 14:33:53,995 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 14:33:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:53,995 INFO L225 Difference]: With dead ends: 116 [2020-04-17 14:33:53,995 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 14:33:53,996 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 14:33:53,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 14:33:53,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-04-17 14:33:53,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 14:33:53,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-04-17 14:33:53,998 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-04-17 14:33:53,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:53,999 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-04-17 14:33:53,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:53,999 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-04-17 14:33:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:53,999 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:53,999 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:54,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:54,200 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:54,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:54,201 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-04-17 14:33:54,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:54,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356642889] [2020-04-17 14:33:54,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:54,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356642889] [2020-04-17 14:33:54,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164508759] [2020-04-17 14:33:54,391 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:54,442 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:33:54,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:54,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:54,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:54,459 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:54,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:54,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:33:54,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534496150] [2020-04-17 14:33:54,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:33:54,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:54,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:33:54,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:33:54,487 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-04-17 14:33:55,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:55,511 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-04-17 14:33:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 14:33:55,512 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:33:55,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:55,512 INFO L225 Difference]: With dead ends: 96 [2020-04-17 14:33:55,513 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 14:33:55,513 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-04-17 14:33:55,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 14:33:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-04-17 14:33:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 14:33:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-04-17 14:33:55,516 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-04-17 14:33:55,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:55,517 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-04-17 14:33:55,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:33:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-04-17 14:33:55,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:55,517 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:55,517 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:55,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:55,718 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:55,718 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-04-17 14:33:55,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:55,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260200377] [2020-04-17 14:33:55,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:55,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:55,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260200377] [2020-04-17 14:33:55,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523749265] [2020-04-17 14:33:55,960 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:56,014 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 14:33:56,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:56,016 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:56,016 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:56,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:56,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:33:56,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135275009] [2020-04-17 14:33:56,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:56,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:56,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:56,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:56,023 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-04-17 14:33:56,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:56,453 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-04-17 14:33:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 14:33:56,453 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:33:56,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:56,454 INFO L225 Difference]: With dead ends: 102 [2020-04-17 14:33:56,454 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 14:33:56,454 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 14:33:56,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 14:33:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-04-17 14:33:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:33:56,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-04-17 14:33:56,456 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-04-17 14:33:56,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:56,457 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-04-17 14:33:56,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:56,457 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-04-17 14:33:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:56,457 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:56,457 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:56,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:56,658 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:56,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:56,659 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-04-17 14:33:56,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:56,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138892403] [2020-04-17 14:33:56,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:56,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138892403] [2020-04-17 14:33:56,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18341581] [2020-04-17 14:33:56,928 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:56,986 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 14:33:56,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:56,987 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:56,988 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:57,004 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:57,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:57,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:33:57,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896672300] [2020-04-17 14:33:57,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:33:57,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:57,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:33:57,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:33:57,013 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-04-17 14:33:57,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:57,520 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-04-17 14:33:57,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 14:33:57,520 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:33:57,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:57,521 INFO L225 Difference]: With dead ends: 122 [2020-04-17 14:33:57,521 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 14:33:57,522 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 14:33:57,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 14:33:57,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-04-17 14:33:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 14:33:57,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-04-17 14:33:57,525 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-04-17 14:33:57,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:57,525 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-04-17 14:33:57,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:33:57,525 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-04-17 14:33:57,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:57,526 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:57,526 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:57,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:57,729 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:57,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:57,730 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-04-17 14:33:57,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:57,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784438724] [2020-04-17 14:33:57,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:57,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784438724] [2020-04-17 14:33:57,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310097187] [2020-04-17 14:33:57,968 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:58,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:58,021 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:58,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:58,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:33:58,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686884531] [2020-04-17 14:33:58,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:33:58,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:58,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:33:58,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:33:58,030 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-04-17 14:33:58,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:58,547 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-04-17 14:33:58,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:33:58,547 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:33:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:58,548 INFO L225 Difference]: With dead ends: 123 [2020-04-17 14:33:58,548 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 14:33:58,549 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 14:33:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 14:33:58,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-04-17 14:33:58,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 14:33:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-04-17 14:33:58,551 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-04-17 14:33:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:58,552 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-04-17 14:33:58,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:33:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-04-17 14:33:58,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:58,552 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:58,552 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:58,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:58,756 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:58,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:58,756 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-04-17 14:33:58,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:58,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162342954] [2020-04-17 14:33:58,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:33:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:58,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162342954] [2020-04-17 14:33:58,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172344477] [2020-04-17 14:33:58,987 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:59,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:33:59,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:33:59,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:33:59,040 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:33:59,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:33:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:33:59,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:33:59,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:33:59,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267030909] [2020-04-17 14:33:59,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:33:59,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:33:59,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:33:59,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:33:59,066 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-04-17 14:33:59,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:33:59,618 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-04-17 14:33:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:33:59,618 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:33:59,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:33:59,619 INFO L225 Difference]: With dead ends: 139 [2020-04-17 14:33:59,619 INFO L226 Difference]: Without dead ends: 133 [2020-04-17 14:33:59,619 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 14:33:59,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-04-17 14:33:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-04-17 14:33:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 14:33:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-04-17 14:33:59,622 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-04-17 14:33:59,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:33:59,623 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-04-17 14:33:59,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:33:59,623 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-04-17 14:33:59,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:33:59,623 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:33:59,624 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:33:59,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:33:59,827 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:33:59,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:33:59,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-04-17 14:33:59,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:33:59,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153047659] [2020-04-17 14:33:59,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:33:59,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:00,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153047659] [2020-04-17 14:34:00,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144662740] [2020-04-17 14:34:00,059 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:00,116 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 14:34:00,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:00,118 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:00,118 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:00,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:00,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:34:00,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904834078] [2020-04-17 14:34:00,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:34:00,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:00,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:34:00,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:34:00,129 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-04-17 14:34:00,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:00,666 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-04-17 14:34:00,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:34:00,667 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:34:00,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:00,668 INFO L225 Difference]: With dead ends: 139 [2020-04-17 14:34:00,668 INFO L226 Difference]: Without dead ends: 133 [2020-04-17 14:34:00,668 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:34:00,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-04-17 14:34:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-04-17 14:34:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 14:34:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-04-17 14:34:00,670 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-04-17 14:34:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:00,671 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-04-17 14:34:00,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:34:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-04-17 14:34:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:00,671 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:00,671 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:00,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:00,872 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:00,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:00,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-04-17 14:34:00,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:00,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017491528] [2020-04-17 14:34:00,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:01,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017491528] [2020-04-17 14:34:01,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001510293] [2020-04-17 14:34:01,102 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:01,150 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:34:01,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:01,151 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:01,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:01,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:01,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:01,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:34:01,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922672117] [2020-04-17 14:34:01,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:01,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:01,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:01,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:01,178 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-04-17 14:34:01,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:01,813 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-04-17 14:34:01,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:34:01,814 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:34:01,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:01,814 INFO L225 Difference]: With dead ends: 136 [2020-04-17 14:34:01,814 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 14:34:01,815 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:34:01,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 14:34:01,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-04-17 14:34:01,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 14:34:01,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-04-17 14:34:01,817 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-04-17 14:34:01,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:01,818 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-04-17 14:34:01,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:01,818 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-04-17 14:34:01,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:01,818 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:01,818 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:02,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:02,019 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:02,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:02,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-04-17 14:34:02,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:02,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764699094] [2020-04-17 14:34:02,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:02,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764699094] [2020-04-17 14:34:02,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180808417] [2020-04-17 14:34:02,235 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:02,301 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 14:34:02,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:02,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:02,303 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:02,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:02,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:34:02,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353201752] [2020-04-17 14:34:02,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:34:02,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:02,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:34:02,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:34:02,314 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-04-17 14:34:02,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:02,922 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-04-17 14:34:02,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:34:02,922 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:34:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:02,923 INFO L225 Difference]: With dead ends: 137 [2020-04-17 14:34:02,923 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 14:34:02,923 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 14:34:02,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 14:34:02,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-04-17 14:34:02,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 14:34:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-04-17 14:34:02,926 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-04-17 14:34:02,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:02,926 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-04-17 14:34:02,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:34:02,926 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-04-17 14:34:02,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:02,926 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:02,926 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:03,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:03,127 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:03,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:03,128 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-04-17 14:34:03,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:03,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414534731] [2020-04-17 14:34:03,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:03,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414534731] [2020-04-17 14:34:03,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634549798] [2020-04-17 14:34:03,348 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:03,404 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 14:34:03,404 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:03,406 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:03,407 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:03,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:03,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:03,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:34:03,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660751675] [2020-04-17 14:34:03,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:03,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:03,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:03,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:03,435 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-04-17 14:34:04,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:04,136 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-04-17 14:34:04,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:34:04,137 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:34:04,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:04,137 INFO L225 Difference]: With dead ends: 134 [2020-04-17 14:34:04,138 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 14:34:04,138 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 14:34:04,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 14:34:04,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-04-17 14:34:04,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 14:34:04,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-04-17 14:34:04,141 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-04-17 14:34:04,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:04,141 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-04-17 14:34:04,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-04-17 14:34:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:04,141 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:04,142 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:04,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:04,344 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:04,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:04,344 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-04-17 14:34:04,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:04,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580811397] [2020-04-17 14:34:04,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:04,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580811397] [2020-04-17 14:34:04,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798282506] [2020-04-17 14:34:04,551 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:04,603 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:04,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:04,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:04,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:34:04,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641640170] [2020-04-17 14:34:04,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:34:04,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:04,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:34:04,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:34:04,614 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-04-17 14:34:05,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:05,261 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-04-17 14:34:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 14:34:05,261 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:34:05,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:05,262 INFO L225 Difference]: With dead ends: 135 [2020-04-17 14:34:05,262 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 14:34:05,262 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 14:34:05,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 14:34:05,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-04-17 14:34:05,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:34:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-04-17 14:34:05,264 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-04-17 14:34:05,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:05,265 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-04-17 14:34:05,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:34:05,265 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-04-17 14:34:05,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:05,265 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:05,265 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:05,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:05,466 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:05,466 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-04-17 14:34:05,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:05,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90664128] [2020-04-17 14:34:05,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:05,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90664128] [2020-04-17 14:34:05,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35305494] [2020-04-17 14:34:05,680 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:05,727 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:34:05,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:05,728 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:05,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:05,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:05,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:05,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:34:05,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89270869] [2020-04-17 14:34:05,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:05,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:05,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:05,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:05,760 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-04-17 14:34:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:06,538 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-04-17 14:34:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:34:06,539 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:34:06,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:06,540 INFO L225 Difference]: With dead ends: 132 [2020-04-17 14:34:06,540 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 14:34:06,541 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 14:34:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 14:34:06,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-04-17 14:34:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:34:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-04-17 14:34:06,543 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-04-17 14:34:06,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:06,544 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-04-17 14:34:06,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-04-17 14:34:06,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:06,544 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:06,544 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:06,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:06,748 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:06,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:06,748 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-04-17 14:34:06,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:06,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308793530] [2020-04-17 14:34:06,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:06,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308793530] [2020-04-17 14:34:06,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514312384] [2020-04-17 14:34:06,941 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:06,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 14:34:06,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:06,999 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:07,000 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:07,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:07,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:34:07,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413554490] [2020-04-17 14:34:07,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:34:07,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:07,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:34:07,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:34:07,018 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-04-17 14:34:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:07,704 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-04-17 14:34:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:34:07,704 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:34:07,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:07,705 INFO L225 Difference]: With dead ends: 133 [2020-04-17 14:34:07,705 INFO L226 Difference]: Without dead ends: 127 [2020-04-17 14:34:07,706 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 14:34:07,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-04-17 14:34:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-04-17 14:34:07,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 14:34:07,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-04-17 14:34:07,708 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-04-17 14:34:07,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:07,708 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-04-17 14:34:07,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:34:07,709 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-04-17 14:34:07,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:07,709 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:07,709 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:07,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:07,910 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:07,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:07,910 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-04-17 14:34:07,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:07,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122170915] [2020-04-17 14:34:07,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:08,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122170915] [2020-04-17 14:34:08,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524614531] [2020-04-17 14:34:08,113 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:08,163 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:34:08,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:08,164 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:08,165 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:08,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:08,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:08,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:34:08,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742870283] [2020-04-17 14:34:08,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:08,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:08,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:08,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:08,193 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-04-17 14:34:09,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:09,047 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-04-17 14:34:09,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 14:34:09,047 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:34:09,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:09,048 INFO L225 Difference]: With dead ends: 130 [2020-04-17 14:34:09,048 INFO L226 Difference]: Without dead ends: 124 [2020-04-17 14:34:09,048 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 14:34:09,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-04-17 14:34:09,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-04-17 14:34:09,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 14:34:09,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-04-17 14:34:09,051 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-04-17 14:34:09,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:09,051 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-04-17 14:34:09,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:09,051 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-04-17 14:34:09,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:09,051 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:09,051 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:09,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:09,252 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:09,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:09,253 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-04-17 14:34:09,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:09,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155912702] [2020-04-17 14:34:09,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:09,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155912702] [2020-04-17 14:34:09,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258698451] [2020-04-17 14:34:09,439 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:09,495 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 14:34:09,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:09,497 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:09,498 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:09,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:09,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:34:09,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698880230] [2020-04-17 14:34:09,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:34:09,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:09,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:34:09,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:34:09,512 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-04-17 14:34:10,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:10,253 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-04-17 14:34:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 14:34:10,254 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:34:10,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:10,255 INFO L225 Difference]: With dead ends: 131 [2020-04-17 14:34:10,255 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 14:34:10,255 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 14:34:10,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 14:34:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-04-17 14:34:10,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-04-17 14:34:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-04-17 14:34:10,258 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-04-17 14:34:10,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:10,259 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-04-17 14:34:10,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:34:10,259 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-04-17 14:34:10,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:10,259 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:10,259 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:10,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:10,463 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:10,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:10,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-04-17 14:34:10,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:10,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180400698] [2020-04-17 14:34:10,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:10,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180400698] [2020-04-17 14:34:10,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859742743] [2020-04-17 14:34:10,689 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:10,745 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 14:34:10,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:10,747 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:10,748 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:10,764 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:10,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:10,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:34:10,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192489989] [2020-04-17 14:34:10,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:10,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:10,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:10,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:10,787 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-04-17 14:34:11,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:11,687 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-04-17 14:34:11,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 14:34:11,687 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:34:11,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:11,688 INFO L225 Difference]: With dead ends: 128 [2020-04-17 14:34:11,688 INFO L226 Difference]: Without dead ends: 122 [2020-04-17 14:34:11,689 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 14:34:11,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-17 14:34:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-04-17 14:34:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-04-17 14:34:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-04-17 14:34:11,691 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-04-17 14:34:11,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:11,691 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-04-17 14:34:11,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-04-17 14:34:11,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:11,692 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:11,692 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:11,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:11,892 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:11,893 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-04-17 14:34:11,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:11,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330277982] [2020-04-17 14:34:11,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:12,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330277982] [2020-04-17 14:34:12,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409848478] [2020-04-17 14:34:12,074 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:12,125 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:12,125 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:12,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:12,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:34:12,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208153257] [2020-04-17 14:34:12,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:34:12,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:12,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:34:12,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:34:12,139 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-04-17 14:34:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:12,919 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-04-17 14:34:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 14:34:12,920 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:34:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:12,920 INFO L225 Difference]: With dead ends: 129 [2020-04-17 14:34:12,920 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 14:34:12,921 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 14:34:12,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 14:34:12,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-04-17 14:34:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:34:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 14:34:12,923 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-04-17 14:34:12,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:12,923 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 14:34:12,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:34:12,924 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 14:34:12,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:12,924 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:12,924 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:13,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:13,125 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:13,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:13,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-04-17 14:34:13,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:13,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593209944] [2020-04-17 14:34:13,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:13,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593209944] [2020-04-17 14:34:13,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20355650] [2020-04-17 14:34:13,313 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:13,358 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:34:13,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:13,359 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:13,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:13,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:13,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:13,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:34:13,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965235132] [2020-04-17 14:34:13,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:13,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:13,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:13,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:13,396 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-04-17 14:34:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:14,405 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-04-17 14:34:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 14:34:14,406 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:34:14,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:14,406 INFO L225 Difference]: With dead ends: 126 [2020-04-17 14:34:14,407 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 14:34:14,407 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-04-17 14:34:14,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 14:34:14,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-04-17 14:34:14,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:34:14,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 14:34:14,409 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-04-17 14:34:14,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:14,410 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 14:34:14,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:14,410 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 14:34:14,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:14,410 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:14,410 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:14,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:14,611 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:14,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:14,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-04-17 14:34:14,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:14,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573647380] [2020-04-17 14:34:14,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:14,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573647380] [2020-04-17 14:34:14,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251525814] [2020-04-17 14:34:14,799 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:14,859 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 14:34:14,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:14,861 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:14,861 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:14,876 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:14,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:14,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:34:14,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131321139] [2020-04-17 14:34:14,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:34:14,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:14,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:34:14,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:34:14,878 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-04-17 14:34:15,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:15,690 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-04-17 14:34:15,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-17 14:34:15,690 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:34:15,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:15,691 INFO L225 Difference]: With dead ends: 127 [2020-04-17 14:34:15,691 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 14:34:15,692 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 14:34:15,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 14:34:15,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-04-17 14:34:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-04-17 14:34:15,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-04-17 14:34:15,694 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-04-17 14:34:15,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:15,694 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-04-17 14:34:15,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:34:15,694 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-04-17 14:34:15,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:15,695 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:15,695 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:15,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:15,895 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:15,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:15,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-04-17 14:34:15,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:15,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500416534] [2020-04-17 14:34:15,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:16,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500416534] [2020-04-17 14:34:16,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133350347] [2020-04-17 14:34:16,087 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:16,139 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:34:16,139 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:16,140 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:16,141 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:16,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:16,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:16,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:34:16,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350582561] [2020-04-17 14:34:16,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:16,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:16,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:16,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:16,186 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-04-17 14:34:17,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:17,241 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-04-17 14:34:17,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 14:34:17,242 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:34:17,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:17,242 INFO L225 Difference]: With dead ends: 124 [2020-04-17 14:34:17,243 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 14:34:17,243 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-04-17 14:34:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 14:34:17,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-04-17 14:34:17,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 14:34:17,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-04-17 14:34:17,246 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-04-17 14:34:17,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:17,246 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-04-17 14:34:17,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:17,247 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-04-17 14:34:17,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:17,247 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:17,247 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:17,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:17,450 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:17,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:17,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-04-17 14:34:17,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:17,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317220132] [2020-04-17 14:34:17,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:17,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317220132] [2020-04-17 14:34:17,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793886519] [2020-04-17 14:34:17,628 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:17,685 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 14:34:17,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:17,687 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:17,687 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:17,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:17,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 14:34:17,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019849105] [2020-04-17 14:34:17,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 14:34:17,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:17,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 14:34:17,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-04-17 14:34:17,702 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-04-17 14:34:18,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:18,562 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-04-17 14:34:18,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 14:34:18,562 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 14:34:18,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:18,563 INFO L225 Difference]: With dead ends: 144 [2020-04-17 14:34:18,563 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 14:34:18,563 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-04-17 14:34:18,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 14:34:18,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-04-17 14:34:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 14:34:18,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-04-17 14:34:18,566 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-04-17 14:34:18,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:18,567 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-04-17 14:34:18,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 14:34:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-04-17 14:34:18,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 14:34:18,567 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:18,567 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:18,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:18,768 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:18,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:18,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-04-17 14:34:18,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:18,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783614401] [2020-04-17 14:34:18,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:18,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783614401] [2020-04-17 14:34:18,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752817713] [2020-04-17 14:34:18,974 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:19,031 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 14:34:19,031 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:19,032 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 14:34:19,033 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:19,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:19,065 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:19,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:19,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 14:34:19,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316496387] [2020-04-17 14:34:19,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:19,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:19,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:19,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:19,067 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-04-17 14:34:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:20,148 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-04-17 14:34:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-17 14:34:20,149 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 14:34:20,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:20,149 INFO L225 Difference]: With dead ends: 125 [2020-04-17 14:34:20,150 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 14:34:20,150 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-04-17 14:34:20,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 14:34:20,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-04-17 14:34:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-17 14:34:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-04-17 14:34:20,152 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-04-17 14:34:20,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:20,153 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-04-17 14:34:20,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:20,153 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-04-17 14:34:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:20,153 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:20,154 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:20,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:20,354 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:20,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:20,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-04-17 14:34:20,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:20,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90721413] [2020-04-17 14:34:20,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:20,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90721413] [2020-04-17 14:34:20,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197151356] [2020-04-17 14:34:20,629 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:20,684 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:20,685 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:20,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:20,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:20,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958261070] [2020-04-17 14:34:20,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:20,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:20,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:20,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:20,694 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-04-17 14:34:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:21,191 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-04-17 14:34:21,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:34:21,192 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:21,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:21,192 INFO L225 Difference]: With dead ends: 144 [2020-04-17 14:34:21,192 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 14:34:21,193 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 14:34:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 14:34:21,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-04-17 14:34:21,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:21,196 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:21,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:21,196 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:21,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:21,196 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:21,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:21,197 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:21,197 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:21,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:21,397 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:21,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:21,398 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-04-17 14:34:21,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:21,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214629948] [2020-04-17 14:34:21,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:21,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214629948] [2020-04-17 14:34:21,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738126971] [2020-04-17 14:34:21,662 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:21,714 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:34:21,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:21,716 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:21,716 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:21,743 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:21,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:21,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:21,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304967938] [2020-04-17 14:34:21,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:21,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:21,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:21,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:21,754 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:22,319 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-04-17 14:34:22,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:34:22,319 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:22,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:22,320 INFO L225 Difference]: With dead ends: 141 [2020-04-17 14:34:22,320 INFO L226 Difference]: Without dead ends: 135 [2020-04-17 14:34:22,320 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:34:22,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-04-17 14:34:22,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-04-17 14:34:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:22,323 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:22,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:22,323 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:22,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:22,323 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:22,324 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:22,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:22,524 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:22,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:22,525 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-04-17 14:34:22,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:22,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195901740] [2020-04-17 14:34:22,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:22,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195901740] [2020-04-17 14:34:22,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964229359] [2020-04-17 14:34:22,780 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:22,839 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 14:34:22,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:22,841 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:22,842 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:22,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:22,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:22,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68105556] [2020-04-17 14:34:22,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:22,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:22,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:22,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:22,851 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:23,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:23,378 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-04-17 14:34:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:34:23,378 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:23,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:23,379 INFO L225 Difference]: With dead ends: 138 [2020-04-17 14:34:23,379 INFO L226 Difference]: Without dead ends: 132 [2020-04-17 14:34:23,379 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 14:34:23,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-04-17 14:34:23,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-04-17 14:34:23,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:23,382 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:23,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:23,382 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:23,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:23,382 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:23,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:23,382 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:23,382 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:23,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:23,583 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:23,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:23,584 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-04-17 14:34:23,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:23,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849269886] [2020-04-17 14:34:23,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:23,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849269886] [2020-04-17 14:34:23,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292852919] [2020-04-17 14:34:23,850 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:23,901 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:34:23,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:23,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:23,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:23,919 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:23,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:23,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:23,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345145605] [2020-04-17 14:34:23,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:23,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:23,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:23,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:23,927 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:24,549 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-04-17 14:34:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:34:24,549 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:24,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:24,550 INFO L225 Difference]: With dead ends: 137 [2020-04-17 14:34:24,550 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 14:34:24,551 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 14:34:24,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 14:34:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-04-17 14:34:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:24,553 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:24,553 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:24,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:24,554 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:24,554 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:24,554 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:24,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:24,755 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:24,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:24,755 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-04-17 14:34:24,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:24,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265395837] [2020-04-17 14:34:24,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:24,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265395837] [2020-04-17 14:34:24,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154404503] [2020-04-17 14:34:24,994 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:25,049 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 14:34:25,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:25,050 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:25,050 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:25,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:25,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:25,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736465341] [2020-04-17 14:34:25,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:25,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:25,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:25,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:25,080 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:25,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:25,643 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-04-17 14:34:25,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:34:25,643 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:25,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:25,644 INFO L225 Difference]: With dead ends: 134 [2020-04-17 14:34:25,644 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 14:34:25,644 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:34:25,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 14:34:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-04-17 14:34:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:25,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:25,647 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:25,647 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:25,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:25,647 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:25,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:25,647 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:25,648 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:25,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:25,851 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:25,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:25,852 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-04-17 14:34:25,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:25,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317857839] [2020-04-17 14:34:25,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:26,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317857839] [2020-04-17 14:34:26,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149090068] [2020-04-17 14:34:26,092 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:26,152 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 14:34:26,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:26,154 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:26,155 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:26,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:26,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:26,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:26,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396517556] [2020-04-17 14:34:26,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:26,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:26,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:26,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:26,181 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:26,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:26,896 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-04-17 14:34:26,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:34:26,897 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:26,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:26,897 INFO L225 Difference]: With dead ends: 133 [2020-04-17 14:34:26,897 INFO L226 Difference]: Without dead ends: 127 [2020-04-17 14:34:26,898 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 14:34:26,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-04-17 14:34:26,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-04-17 14:34:26,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:26,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:26,900 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:26,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:26,901 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:26,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:26,901 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:26,901 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:26,901 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:27,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:27,102 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:27,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:27,103 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-04-17 14:34:27,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:27,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409926634] [2020-04-17 14:34:27,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:27,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409926634] [2020-04-17 14:34:27,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661525256] [2020-04-17 14:34:27,336 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:27,393 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:27,394 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:27,404 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:27,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:27,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:27,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666316705] [2020-04-17 14:34:27,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:27,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:27,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:27,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:27,406 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:28,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:28,035 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-04-17 14:34:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:34:28,036 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:28,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:28,036 INFO L225 Difference]: With dead ends: 130 [2020-04-17 14:34:28,036 INFO L226 Difference]: Without dead ends: 124 [2020-04-17 14:34:28,037 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 14:34:28,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-04-17 14:34:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-04-17 14:34:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:28,039 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:28,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:28,040 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:28,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:28,040 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:28,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:28,040 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:28,040 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:28,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:28,241 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:28,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:28,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-04-17 14:34:28,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:28,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166499383] [2020-04-17 14:34:28,242 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:28,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166499383] [2020-04-17 14:34:28,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9552624] [2020-04-17 14:34:28,498 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:28,550 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:34:28,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:28,551 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:28,552 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:28,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:28,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:28,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:28,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554162817] [2020-04-17 14:34:28,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:28,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:28,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:28,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:28,579 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:29,389 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-04-17 14:34:29,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:34:29,390 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:29,390 INFO L225 Difference]: With dead ends: 129 [2020-04-17 14:34:29,390 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 14:34:29,391 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 14:34:29,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 14:34:29,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-04-17 14:34:29,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:29,394 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:29,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:29,394 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:29,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:29,394 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:29,395 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:29,395 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:29,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:29,596 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:29,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:29,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-04-17 14:34:29,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:29,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032780083] [2020-04-17 14:34:29,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:29,816 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:29,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032780083] [2020-04-17 14:34:29,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48200029] [2020-04-17 14:34:29,816 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:29,874 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 14:34:29,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:29,875 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:29,876 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:29,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:29,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:29,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884864337] [2020-04-17 14:34:29,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:29,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:29,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:29,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:29,888 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:30,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:30,570 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-04-17 14:34:30,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 14:34:30,570 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:30,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:30,571 INFO L225 Difference]: With dead ends: 126 [2020-04-17 14:34:30,571 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 14:34:30,572 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 14:34:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 14:34:30,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-04-17 14:34:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:30,574 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:30,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:30,574 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:30,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:30,574 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:30,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:30,575 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:30,575 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:30,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:30,775 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:30,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:30,776 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-04-17 14:34:30,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:30,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702970965] [2020-04-17 14:34:30,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:30,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702970965] [2020-04-17 14:34:30,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315428092] [2020-04-17 14:34:30,996 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:31,048 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:34:31,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:31,049 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:31,049 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:31,066 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:31,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:31,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:31,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406235095] [2020-04-17 14:34:31,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:31,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:31,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:31,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:31,084 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:31,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:31,953 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-04-17 14:34:31,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 14:34:31,953 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:31,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:31,954 INFO L225 Difference]: With dead ends: 125 [2020-04-17 14:34:31,954 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 14:34:31,955 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 14:34:31,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 14:34:31,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-04-17 14:34:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:31,958 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:31,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:31,958 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:31,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:31,958 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:31,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:31,958 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:31,958 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:32,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:32,162 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:32,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-04-17 14:34:32,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:32,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022270021] [2020-04-17 14:34:32,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:32,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022270021] [2020-04-17 14:34:32,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031872310] [2020-04-17 14:34:32,378 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:32,437 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 14:34:32,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:32,438 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:32,439 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:32,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:32,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:32,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246282416] [2020-04-17 14:34:32,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:32,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:32,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:32,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:32,451 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:33,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:33,198 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-04-17 14:34:33,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:34:33,198 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:33,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:33,199 INFO L225 Difference]: With dead ends: 122 [2020-04-17 14:34:33,199 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 14:34:33,200 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 14:34:33,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 14:34:33,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-04-17 14:34:33,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:33,203 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:33,203 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:33,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:33,204 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:33,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:33,204 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:33,204 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:33,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:33,408 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:33,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:33,408 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-04-17 14:34:33,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:33,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146744064] [2020-04-17 14:34:33,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:33,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146744064] [2020-04-17 14:34:33,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109583055] [2020-04-17 14:34:33,618 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:33,676 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 14:34:33,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:33,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:33,678 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:33,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:33,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:33,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:33,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26333815] [2020-04-17 14:34:33,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:33,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:33,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:33,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:33,710 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:34,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:34,670 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-04-17 14:34:34,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 14:34:34,670 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:34,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:34,671 INFO L225 Difference]: With dead ends: 121 [2020-04-17 14:34:34,671 INFO L226 Difference]: Without dead ends: 115 [2020-04-17 14:34:34,671 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 14:34:34,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-04-17 14:34:34,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-04-17 14:34:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:34,674 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:34,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:34,675 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:34,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:34,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:34,675 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:34,675 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:34,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:34,878 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:34,879 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-04-17 14:34:34,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:34,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420145807] [2020-04-17 14:34:34,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:35,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420145807] [2020-04-17 14:34:35,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974695613] [2020-04-17 14:34:35,080 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:35,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:35,135 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:35,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:35,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:35,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321472646] [2020-04-17 14:34:35,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:35,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:35,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:35,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:35,147 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:35,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:35,949 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-04-17 14:34:35,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 14:34:35,949 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:35,950 INFO L225 Difference]: With dead ends: 118 [2020-04-17 14:34:35,950 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 14:34:35,951 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 14:34:35,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 14:34:35,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-04-17 14:34:35,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:35,953 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:35,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:35,953 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:35,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:35,954 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:35,954 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:35,954 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:36,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:36,155 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:36,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:36,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-04-17 14:34:36,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:36,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173367312] [2020-04-17 14:34:36,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:36,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173367312] [2020-04-17 14:34:36,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050768202] [2020-04-17 14:34:36,372 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:36,422 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:34:36,422 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:36,423 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:36,424 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:36,442 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:36,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:36,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:36,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011374915] [2020-04-17 14:34:36,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:36,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:36,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:36,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:36,456 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:37,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:37,476 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-04-17 14:34:37,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 14:34:37,476 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:37,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:37,477 INFO L225 Difference]: With dead ends: 117 [2020-04-17 14:34:37,477 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 14:34:37,477 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 14:34:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 14:34:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-04-17 14:34:37,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:37,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:37,480 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:37,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:37,480 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:37,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:37,480 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:37,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:37,480 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:37,481 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:37,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:37,681 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:37,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:37,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-04-17 14:34:37,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:37,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524347271] [2020-04-17 14:34:37,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:37,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524347271] [2020-04-17 14:34:37,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293972989] [2020-04-17 14:34:37,881 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:37,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 14:34:37,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:37,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2020-04-17 14:34:37,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:37,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:37,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:37,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189099450] [2020-04-17 14:34:37,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:37,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:37,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:37,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:37,966 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:38,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:38,798 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-04-17 14:34:38,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 14:34:38,799 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:38,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:38,799 INFO L225 Difference]: With dead ends: 114 [2020-04-17 14:34:38,799 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 14:34:38,800 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-04-17 14:34:38,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 14:34:38,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-04-17 14:34:38,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:38,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:38,803 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:38,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:38,803 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:38,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:38,803 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:38,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:38,803 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:38,803 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:39,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:39,004 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:39,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:39,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-04-17 14:34:39,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:39,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892661076] [2020-04-17 14:34:39,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:39,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892661076] [2020-04-17 14:34:39,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739091305] [2020-04-17 14:34:39,198 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:39,249 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:34:39,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:39,251 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:39,251 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:39,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:39,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:39,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:39,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470247008] [2020-04-17 14:34:39,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:39,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:39,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:39,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:39,283 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:40,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:40,392 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-04-17 14:34:40,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 14:34:40,393 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:40,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:40,394 INFO L225 Difference]: With dead ends: 113 [2020-04-17 14:34:40,394 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 14:34:40,394 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-04-17 14:34:40,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 14:34:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-04-17 14:34:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:40,397 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:40,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:40,397 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:40,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:40,397 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:40,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:40,398 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:40,398 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:40,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:40,599 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:40,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:40,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-04-17 14:34:40,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:40,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187631285] [2020-04-17 14:34:40,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:40,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187631285] [2020-04-17 14:34:40,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419819527] [2020-04-17 14:34:40,798 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:40,859 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 14:34:40,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:40,861 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:40,862 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:40,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:40,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:40,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047850136] [2020-04-17 14:34:40,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:40,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:40,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:40,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:40,876 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:41,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:41,755 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-04-17 14:34:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-17 14:34:41,756 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:41,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:41,756 INFO L225 Difference]: With dead ends: 110 [2020-04-17 14:34:41,757 INFO L226 Difference]: Without dead ends: 104 [2020-04-17 14:34:41,757 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-04-17 14:34:41,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-17 14:34:41,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-04-17 14:34:41,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:34:41,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:34:41,760 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-04-17 14:34:41,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:41,760 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:34:41,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:34:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:41,761 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:41,761 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:41,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:41,962 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:41,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:41,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-04-17 14:34:41,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:41,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759551185] [2020-04-17 14:34:41,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:42,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759551185] [2020-04-17 14:34:42,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110512527] [2020-04-17 14:34:42,177 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:42,242 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 14:34:42,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:42,243 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 29 conjunts are in the unsatisfiable core [2020-04-17 14:34:42,244 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:42,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:42,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:42,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673138533] [2020-04-17 14:34:42,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:42,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:42,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:42,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:42,293 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-04-17 14:34:43,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:43,630 INFO L93 Difference]: Finished difference Result 107 states and 265 transitions. [2020-04-17 14:34:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 14:34:43,631 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:43,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:43,631 INFO L225 Difference]: With dead ends: 107 [2020-04-17 14:34:43,631 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 14:34:43,632 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1011, Invalid=2771, Unknown=0, NotChecked=0, Total=3782 [2020-04-17 14:34:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 14:34:43,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2020-04-17 14:34:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:34:43,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:34:43,634 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-04-17 14:34:43,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:43,635 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:34:43,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:43,635 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:34:43,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:43,635 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:43,635 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:43,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:43,836 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:43,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:43,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-04-17 14:34:43,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:43,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926731238] [2020-04-17 14:34:43,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:44,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926731238] [2020-04-17 14:34:44,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391555530] [2020-04-17 14:34:44,043 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:44,095 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:44,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:44,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:44,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-04-17 14:34:44,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318184360] [2020-04-17 14:34:44,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 14:34:44,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:44,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 14:34:44,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-04-17 14:34:44,112 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-04-17 14:34:45,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:45,038 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-04-17 14:34:45,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 14:34:45,038 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-04-17 14:34:45,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:45,039 INFO L225 Difference]: With dead ends: 125 [2020-04-17 14:34:45,039 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 14:34:45,040 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-04-17 14:34:45,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 14:34:45,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-04-17 14:34:45,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-04-17 14:34:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-04-17 14:34:45,042 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-04-17 14:34:45,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:45,042 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-04-17 14:34:45,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 14:34:45,043 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-04-17 14:34:45,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:45,043 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:45,043 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:45,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:45,244 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:45,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:45,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-04-17 14:34:45,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:45,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696454082] [2020-04-17 14:34:45,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:45,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696454082] [2020-04-17 14:34:45,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12279249] [2020-04-17 14:34:45,465 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:45,520 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:34:45,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:45,521 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:45,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:45,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:45,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:45,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093451041] [2020-04-17 14:34:45,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:45,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:45,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:45,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:45,583 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-04-17 14:34:46,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:46,651 INFO L93 Difference]: Finished difference Result 104 states and 261 transitions. [2020-04-17 14:34:46,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-17 14:34:46,651 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:46,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:46,652 INFO L225 Difference]: With dead ends: 104 [2020-04-17 14:34:46,652 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 14:34:46,652 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1121, Invalid=2911, Unknown=0, NotChecked=0, Total=4032 [2020-04-17 14:34:46,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 14:34:46,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2020-04-17 14:34:46,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 14:34:46,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-04-17 14:34:46,654 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-04-17 14:34:46,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:46,655 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-04-17 14:34:46,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:46,655 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-04-17 14:34:46,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 14:34:46,655 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:46,656 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:46,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:46,856 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:46,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:46,857 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-04-17 14:34:46,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:46,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794904675] [2020-04-17 14:34:46,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:47,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794904675] [2020-04-17 14:34:47,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171200673] [2020-04-17 14:34:47,048 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:47,110 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 14:34:47,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:47,111 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-04-17 14:34:47,112 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:47,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:47,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:47,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-04-17 14:34:47,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080806256] [2020-04-17 14:34:47,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:47,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:47,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:47,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:47,144 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-04-17 14:34:48,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:48,278 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-04-17 14:34:48,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 14:34:48,279 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-04-17 14:34:48,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:48,279 INFO L225 Difference]: With dead ends: 124 [2020-04-17 14:34:48,280 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 14:34:48,280 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-04-17 14:34:48,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 14:34:48,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-04-17 14:34:48,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 14:34:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-04-17 14:34:48,283 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-04-17 14:34:48,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:48,283 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-04-17 14:34:48,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:48,283 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-04-17 14:34:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:48,283 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:48,284 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:48,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:48,484 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:48,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:48,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-04-17 14:34:48,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:48,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107640741] [2020-04-17 14:34:48,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:48,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107640741] [2020-04-17 14:34:48,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743681117] [2020-04-17 14:34:48,697 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:48,748 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:34:48,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:48,749 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:48,750 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:48,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:48,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:48,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:34:48,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694289377] [2020-04-17 14:34:48,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:48,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:48,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:48,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:48,783 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 26 states. [2020-04-17 14:34:49,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:49,971 INFO L93 Difference]: Finished difference Result 102 states and 261 transitions. [2020-04-17 14:34:49,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 14:34:49,971 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:34:49,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:49,972 INFO L225 Difference]: With dead ends: 102 [2020-04-17 14:34:49,972 INFO L226 Difference]: Without dead ends: 97 [2020-04-17 14:34:49,972 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-04-17 14:34:49,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-04-17 14:34:49,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-04-17 14:34:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 14:34:49,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-04-17 14:34:49,975 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 29 [2020-04-17 14:34:49,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:49,975 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-04-17 14:34:49,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:49,976 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-04-17 14:34:49,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:49,976 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:49,976 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:50,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:50,184 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:50,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:50,185 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-04-17 14:34:50,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:50,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953543510] [2020-04-17 14:34:50,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:50,584 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:50,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953543510] [2020-04-17 14:34:50,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697486296] [2020-04-17 14:34:50,584 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:50,649 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-04-17 14:34:50,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:50,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:50,651 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:50,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:50,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:34:50,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987121626] [2020-04-17 14:34:50,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:50,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:50,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:50,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:50,659 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 25 states. [2020-04-17 14:34:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:51,131 INFO L93 Difference]: Finished difference Result 108 states and 251 transitions. [2020-04-17 14:34:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 14:34:51,132 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:34:51,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:51,133 INFO L225 Difference]: With dead ends: 108 [2020-04-17 14:34:51,133 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 14:34:51,133 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 14:34:51,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 14:34:51,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-04-17 14:34:51,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 14:34:51,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-04-17 14:34:51,136 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 29 [2020-04-17 14:34:51,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:51,136 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-04-17 14:34:51,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:51,137 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-04-17 14:34:51,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:51,137 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:51,137 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:51,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:51,340 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:51,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:51,341 INFO L82 PathProgramCache]: Analyzing trace with hash -972903182, now seen corresponding path program 240 times [2020-04-17 14:34:51,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:51,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604415748] [2020-04-17 14:34:51,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:51,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604415748] [2020-04-17 14:34:51,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681875550] [2020-04-17 14:34:51,636 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:51,698 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-04-17 14:34:51,698 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:51,700 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:51,701 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:51,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:51,725 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:51,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:51,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:34:51,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589355160] [2020-04-17 14:34:51,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:51,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:51,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:51,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:51,726 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 26 states. [2020-04-17 14:34:52,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:52,243 INFO L93 Difference]: Finished difference Result 130 states and 295 transitions. [2020-04-17 14:34:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 14:34:52,244 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:34:52,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:52,244 INFO L225 Difference]: With dead ends: 130 [2020-04-17 14:34:52,244 INFO L226 Difference]: Without dead ends: 124 [2020-04-17 14:34:52,245 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=672, Invalid=1584, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 14:34:52,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-04-17 14:34:52,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 76. [2020-04-17 14:34:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 14:34:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 187 transitions. [2020-04-17 14:34:52,247 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 187 transitions. Word has length 29 [2020-04-17 14:34:52,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:52,247 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 187 transitions. [2020-04-17 14:34:52,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:52,248 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 187 transitions. [2020-04-17 14:34:52,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:52,248 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:52,248 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:52,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:52,449 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:52,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:52,449 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 241 times [2020-04-17 14:34:52,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:52,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397182315] [2020-04-17 14:34:52,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:52,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397182315] [2020-04-17 14:34:52,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774754651] [2020-04-17 14:34:52,732 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:52,785 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:52,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:52,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:52,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:34:52,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697181782] [2020-04-17 14:34:52,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:52,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:52,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:52,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:52,794 INFO L87 Difference]: Start difference. First operand 76 states and 187 transitions. Second operand 25 states. [2020-04-17 14:34:53,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:53,391 INFO L93 Difference]: Finished difference Result 131 states and 299 transitions. [2020-04-17 14:34:53,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:34:53,391 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:34:53,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:53,392 INFO L225 Difference]: With dead ends: 131 [2020-04-17 14:34:53,392 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 14:34:53,392 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=674, Invalid=1678, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:34:53,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 14:34:53,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 79. [2020-04-17 14:34:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 14:34:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-04-17 14:34:53,395 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 29 [2020-04-17 14:34:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:53,395 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-04-17 14:34:53,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:53,395 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-04-17 14:34:53,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:53,396 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:53,396 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:53,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:53,596 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:53,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:53,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2015097940, now seen corresponding path program 242 times [2020-04-17 14:34:53,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:53,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774259669] [2020-04-17 14:34:53,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:53,871 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:53,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774259669] [2020-04-17 14:34:53,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283940460] [2020-04-17 14:34:53,872 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:53,925 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:34:53,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:53,927 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:53,927 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:53,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:53,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:53,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:34:53,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309221902] [2020-04-17 14:34:53,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:53,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:53,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:53,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:53,953 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 26 states. [2020-04-17 14:34:54,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:54,600 INFO L93 Difference]: Finished difference Result 149 states and 335 transitions. [2020-04-17 14:34:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:34:54,601 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:34:54,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:54,601 INFO L225 Difference]: With dead ends: 149 [2020-04-17 14:34:54,601 INFO L226 Difference]: Without dead ends: 143 [2020-04-17 14:34:54,602 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=712, Invalid=1838, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 14:34:54,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-04-17 14:34:54,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 78. [2020-04-17 14:34:54,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 14:34:54,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 193 transitions. [2020-04-17 14:34:54,604 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 193 transitions. Word has length 29 [2020-04-17 14:34:54,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:54,604 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 193 transitions. [2020-04-17 14:34:54,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:54,605 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 193 transitions. [2020-04-17 14:34:54,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:54,605 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:54,605 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:54,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:54,806 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:54,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:54,806 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 243 times [2020-04-17 14:34:54,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:54,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516117328] [2020-04-17 14:34:54,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:54,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:55,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516117328] [2020-04-17 14:34:55,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354901390] [2020-04-17 14:34:55,067 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:55,129 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-04-17 14:34:55,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:55,131 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:55,132 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:55,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:55,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:34:55,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854041146] [2020-04-17 14:34:55,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:55,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:55,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:55,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:55,142 INFO L87 Difference]: Start difference. First operand 78 states and 193 transitions. Second operand 25 states. [2020-04-17 14:34:55,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:55,773 INFO L93 Difference]: Finished difference Result 149 states and 337 transitions. [2020-04-17 14:34:55,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:34:55,773 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:34:55,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:55,774 INFO L225 Difference]: With dead ends: 149 [2020-04-17 14:34:55,774 INFO L226 Difference]: Without dead ends: 143 [2020-04-17 14:34:55,774 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=728, Invalid=1924, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 14:34:55,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-04-17 14:34:55,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 81. [2020-04-17 14:34:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 14:34:55,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 201 transitions. [2020-04-17 14:34:55,777 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 201 transitions. Word has length 29 [2020-04-17 14:34:55,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:55,777 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 201 transitions. [2020-04-17 14:34:55,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:55,777 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 201 transitions. [2020-04-17 14:34:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:55,778 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:55,778 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:55,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:55,979 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:55,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:55,979 INFO L82 PathProgramCache]: Analyzing trace with hash -716985290, now seen corresponding path program 244 times [2020-04-17 14:34:55,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:55,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292035181] [2020-04-17 14:34:55,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:56,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292035181] [2020-04-17 14:34:56,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613032531] [2020-04-17 14:34:56,247 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:56,302 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:34:56,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:56,304 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:56,304 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:56,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:56,335 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:56,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:56,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:34:56,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857913386] [2020-04-17 14:34:56,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:56,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:56,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:56,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:56,336 INFO L87 Difference]: Start difference. First operand 81 states and 201 transitions. Second operand 26 states. [2020-04-17 14:34:57,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:57,013 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-04-17 14:34:57,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:34:57,013 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:34:57,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:57,014 INFO L225 Difference]: With dead ends: 146 [2020-04-17 14:34:57,014 INFO L226 Difference]: Without dead ends: 140 [2020-04-17 14:34:57,014 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=731, Invalid=2025, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 14:34:57,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-04-17 14:34:57,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 80. [2020-04-17 14:34:57,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 14:34:57,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 199 transitions. [2020-04-17 14:34:57,017 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 199 transitions. Word has length 29 [2020-04-17 14:34:57,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:57,017 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 199 transitions. [2020-04-17 14:34:57,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:57,018 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 199 transitions. [2020-04-17 14:34:57,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:57,018 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:57,018 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:57,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:57,221 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:57,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:57,222 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 245 times [2020-04-17 14:34:57,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:57,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247687243] [2020-04-17 14:34:57,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:57,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247687243] [2020-04-17 14:34:57,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603986536] [2020-04-17 14:34:57,481 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:57,534 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-04-17 14:34:57,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:57,535 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:57,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:57,545 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:57,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:57,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:34:57,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498274188] [2020-04-17 14:34:57,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:34:57,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:57,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:34:57,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:34:57,546 INFO L87 Difference]: Start difference. First operand 80 states and 199 transitions. Second operand 25 states. [2020-04-17 14:34:58,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:58,229 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-04-17 14:34:58,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 14:34:58,229 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:34:58,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:58,230 INFO L225 Difference]: With dead ends: 147 [2020-04-17 14:34:58,230 INFO L226 Difference]: Without dead ends: 141 [2020-04-17 14:34:58,231 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=762, Invalid=2100, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 14:34:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-04-17 14:34:58,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 83. [2020-04-17 14:34:58,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 14:34:58,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 207 transitions. [2020-04-17 14:34:58,238 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 207 transitions. Word has length 29 [2020-04-17 14:34:58,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:58,238 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 207 transitions. [2020-04-17 14:34:58,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:34:58,238 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 207 transitions. [2020-04-17 14:34:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:58,238 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:58,239 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:58,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:58,439 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:58,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:58,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1465644184, now seen corresponding path program 246 times [2020-04-17 14:34:58,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:58,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714929155] [2020-04-17 14:34:58,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:34:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:58,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714929155] [2020-04-17 14:34:58,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96409029] [2020-04-17 14:34:58,693 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:58,757 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-04-17 14:34:58,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:34:58,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:34:58,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:34:58,778 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:34:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:34:58,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:34:58,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:34:58,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379240739] [2020-04-17 14:34:58,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:34:58,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:34:58,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:34:58,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:34:58,789 INFO L87 Difference]: Start difference. First operand 83 states and 207 transitions. Second operand 26 states. [2020-04-17 14:34:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:34:59,577 INFO L93 Difference]: Finished difference Result 144 states and 329 transitions. [2020-04-17 14:34:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:34:59,577 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:34:59,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:34:59,578 INFO L225 Difference]: With dead ends: 144 [2020-04-17 14:34:59,578 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 14:34:59,578 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=766, Invalid=2204, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 14:34:59,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 14:34:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2020-04-17 14:34:59,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 14:34:59,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 205 transitions. [2020-04-17 14:34:59,580 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 205 transitions. Word has length 29 [2020-04-17 14:34:59,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:34:59,581 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 205 transitions. [2020-04-17 14:34:59,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:34:59,581 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 205 transitions. [2020-04-17 14:34:59,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:34:59,581 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:34:59,581 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:34:59,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:34:59,782 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:34:59,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:34:59,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 247 times [2020-04-17 14:34:59,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:34:59,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073374228] [2020-04-17 14:34:59,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:34:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:00,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073374228] [2020-04-17 14:35:00,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735830487] [2020-04-17 14:35:00,017 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:00,072 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:35:00,072 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:00,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:00,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:35:00,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402356704] [2020-04-17 14:35:00,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:35:00,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:00,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:35:00,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:35:00,083 INFO L87 Difference]: Start difference. First operand 82 states and 205 transitions. Second operand 25 states. [2020-04-17 14:35:00,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:00,810 INFO L93 Difference]: Finished difference Result 145 states and 333 transitions. [2020-04-17 14:35:00,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 14:35:00,810 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:35:00,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:00,811 INFO L225 Difference]: With dead ends: 145 [2020-04-17 14:35:00,811 INFO L226 Difference]: Without dead ends: 139 [2020-04-17 14:35:00,812 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 14:35:00,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-04-17 14:35:00,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 85. [2020-04-17 14:35:00,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-04-17 14:35:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 213 transitions. [2020-04-17 14:35:00,814 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 213 transitions. Word has length 29 [2020-04-17 14:35:00,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:00,814 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 213 transitions. [2020-04-17 14:35:00,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:35:00,814 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 213 transitions. [2020-04-17 14:35:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:00,814 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:00,815 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:01,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:01,018 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:01,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:01,018 INFO L82 PathProgramCache]: Analyzing trace with hash -900797062, now seen corresponding path program 248 times [2020-04-17 14:35:01,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:01,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969906560] [2020-04-17 14:35:01,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:01,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969906560] [2020-04-17 14:35:01,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058290803] [2020-04-17 14:35:01,266 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:01,320 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:35:01,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:01,322 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:35:01,323 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:01,339 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:01,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:01,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:35:01,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598715326] [2020-04-17 14:35:01,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:01,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:01,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:01,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:01,350 INFO L87 Difference]: Start difference. First operand 85 states and 213 transitions. Second operand 26 states. [2020-04-17 14:35:02,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:02,202 INFO L93 Difference]: Finished difference Result 142 states and 327 transitions. [2020-04-17 14:35:02,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 14:35:02,203 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:35:02,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:02,203 INFO L225 Difference]: With dead ends: 142 [2020-04-17 14:35:02,203 INFO L226 Difference]: Without dead ends: 136 [2020-04-17 14:35:02,204 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=817, Invalid=2375, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 14:35:02,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-04-17 14:35:02,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-04-17 14:35:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-04-17 14:35:02,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2020-04-17 14:35:02,206 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 29 [2020-04-17 14:35:02,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:02,206 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2020-04-17 14:35:02,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:02,206 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2020-04-17 14:35:02,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:02,207 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:02,207 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:02,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:02,408 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:02,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:02,408 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 249 times [2020-04-17 14:35:02,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:02,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723136788] [2020-04-17 14:35:02,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:02,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:02,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723136788] [2020-04-17 14:35:02,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204652354] [2020-04-17 14:35:02,635 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:02,694 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-04-17 14:35:02,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:02,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:35:02,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:02,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:02,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:35:02,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667377146] [2020-04-17 14:35:02,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:35:02,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:02,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:35:02,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:35:02,721 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand 25 states. [2020-04-17 14:35:03,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:03,448 INFO L93 Difference]: Finished difference Result 143 states and 331 transitions. [2020-04-17 14:35:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 14:35:03,448 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:35:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:03,449 INFO L225 Difference]: With dead ends: 143 [2020-04-17 14:35:03,449 INFO L226 Difference]: Without dead ends: 137 [2020-04-17 14:35:03,449 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=878, Invalid=2428, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 14:35:03,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-04-17 14:35:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 87. [2020-04-17 14:35:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 14:35:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 219 transitions. [2020-04-17 14:35:03,452 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 219 transitions. Word has length 29 [2020-04-17 14:35:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:03,452 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 219 transitions. [2020-04-17 14:35:03,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:35:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 219 transitions. [2020-04-17 14:35:03,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:03,453 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:03,453 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:03,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:03,653 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:03,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:03,654 INFO L82 PathProgramCache]: Analyzing trace with hash 772716252, now seen corresponding path program 250 times [2020-04-17 14:35:03,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:03,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607124201] [2020-04-17 14:35:03,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:03,893 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:03,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607124201] [2020-04-17 14:35:03,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622430097] [2020-04-17 14:35:03,893 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:03,947 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:35:03,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:03,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:35:03,949 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:03,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:03,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:03,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:35:03,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936074839] [2020-04-17 14:35:03,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:03,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:03,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:03,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:03,978 INFO L87 Difference]: Start difference. First operand 87 states and 219 transitions. Second operand 26 states. [2020-04-17 14:35:04,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:04,901 INFO L93 Difference]: Finished difference Result 140 states and 325 transitions. [2020-04-17 14:35:04,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 14:35:04,901 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:35:04,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:04,902 INFO L225 Difference]: With dead ends: 140 [2020-04-17 14:35:04,902 INFO L226 Difference]: Without dead ends: 134 [2020-04-17 14:35:04,903 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=884, Invalid=2538, Unknown=0, NotChecked=0, Total=3422 [2020-04-17 14:35:04,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-04-17 14:35:04,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2020-04-17 14:35:04,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 14:35:04,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 217 transitions. [2020-04-17 14:35:04,906 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 217 transitions. Word has length 29 [2020-04-17 14:35:04,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:04,906 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 217 transitions. [2020-04-17 14:35:04,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:04,907 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 217 transitions. [2020-04-17 14:35:04,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:04,907 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:04,907 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:05,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:05,111 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:05,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:05,112 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 251 times [2020-04-17 14:35:05,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:05,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841412392] [2020-04-17 14:35:05,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:05,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841412392] [2020-04-17 14:35:05,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312289976] [2020-04-17 14:35:05,340 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:05,403 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-04-17 14:35:05,403 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:05,405 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:35:05,405 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:05,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:05,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:35:05,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399044294] [2020-04-17 14:35:05,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:35:05,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:05,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:35:05,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:35:05,419 INFO L87 Difference]: Start difference. First operand 86 states and 217 transitions. Second operand 25 states. [2020-04-17 14:35:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:06,232 INFO L93 Difference]: Finished difference Result 141 states and 329 transitions. [2020-04-17 14:35:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 14:35:06,232 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:35:06,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:06,233 INFO L225 Difference]: With dead ends: 141 [2020-04-17 14:35:06,233 INFO L226 Difference]: Without dead ends: 135 [2020-04-17 14:35:06,233 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=960, Invalid=2580, Unknown=0, NotChecked=0, Total=3540 [2020-04-17 14:35:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-04-17 14:35:06,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 89. [2020-04-17 14:35:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-04-17 14:35:06,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-04-17 14:35:06,236 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 29 [2020-04-17 14:35:06,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:06,236 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-04-17 14:35:06,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:35:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-04-17 14:35:06,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:06,237 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:06,237 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:06,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:06,441 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:06,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:06,442 INFO L82 PathProgramCache]: Analyzing trace with hash 412446910, now seen corresponding path program 252 times [2020-04-17 14:35:06,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:06,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143840374] [2020-04-17 14:35:06,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:06,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143840374] [2020-04-17 14:35:06,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27555399] [2020-04-17 14:35:06,672 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:06,732 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-04-17 14:35:06,732 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:06,733 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:35:06,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:06,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:06,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:06,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:35:06,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460142429] [2020-04-17 14:35:06,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:06,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:06,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:06,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:06,765 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 26 states. [2020-04-17 14:35:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:07,760 INFO L93 Difference]: Finished difference Result 138 states and 323 transitions. [2020-04-17 14:35:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 14:35:07,760 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:35:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:07,761 INFO L225 Difference]: With dead ends: 138 [2020-04-17 14:35:07,761 INFO L226 Difference]: Without dead ends: 132 [2020-04-17 14:35:07,762 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=967, Invalid=2693, Unknown=0, NotChecked=0, Total=3660 [2020-04-17 14:35:07,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-04-17 14:35:07,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 88. [2020-04-17 14:35:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 14:35:07,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-04-17 14:35:07,766 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 29 [2020-04-17 14:35:07,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:07,766 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-04-17 14:35:07,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:07,766 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-04-17 14:35:07,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:07,767 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:07,767 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:07,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:07,968 INFO L427 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:07,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:07,969 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 253 times [2020-04-17 14:35:07,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:07,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933233886] [2020-04-17 14:35:07,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:08,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933233886] [2020-04-17 14:35:08,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131164033] [2020-04-17 14:35:08,191 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:08,249 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:35:08,249 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:08,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:08,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:35:08,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770418175] [2020-04-17 14:35:08,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:35:08,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:08,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:35:08,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:35:08,263 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 25 states. [2020-04-17 14:35:09,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:09,125 INFO L93 Difference]: Finished difference Result 139 states and 327 transitions. [2020-04-17 14:35:09,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-17 14:35:09,126 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:35:09,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:09,127 INFO L225 Difference]: With dead ends: 139 [2020-04-17 14:35:09,127 INFO L226 Difference]: Without dead ends: 133 [2020-04-17 14:35:09,128 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1058, Invalid=2724, Unknown=0, NotChecked=0, Total=3782 [2020-04-17 14:35:09,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-04-17 14:35:09,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2020-04-17 14:35:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-17 14:35:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 231 transitions. [2020-04-17 14:35:09,130 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 231 transitions. Word has length 29 [2020-04-17 14:35:09,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:09,130 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 231 transitions. [2020-04-17 14:35:09,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:35:09,130 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 231 transitions. [2020-04-17 14:35:09,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:09,131 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:09,131 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:09,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:09,334 INFO L427 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:09,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:09,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1746584800, now seen corresponding path program 254 times [2020-04-17 14:35:09,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:09,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76689445] [2020-04-17 14:35:09,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:09,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76689445] [2020-04-17 14:35:09,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031007946] [2020-04-17 14:35:09,568 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:09,622 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:35:09,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:09,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:35:09,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:09,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:09,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:09,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:35:09,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764733746] [2020-04-17 14:35:09,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:09,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:09,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:09,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:09,658 INFO L87 Difference]: Start difference. First operand 91 states and 231 transitions. Second operand 26 states. [2020-04-17 14:35:10,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:10,743 INFO L93 Difference]: Finished difference Result 136 states and 321 transitions. [2020-04-17 14:35:10,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 14:35:10,745 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:35:10,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:10,746 INFO L225 Difference]: With dead ends: 136 [2020-04-17 14:35:10,746 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 14:35:10,746 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1066, Invalid=2840, Unknown=0, NotChecked=0, Total=3906 [2020-04-17 14:35:10,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 14:35:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2020-04-17 14:35:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-04-17 14:35:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-04-17 14:35:10,748 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 29 [2020-04-17 14:35:10,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:10,749 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-04-17 14:35:10,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:10,749 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-04-17 14:35:10,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:10,749 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:10,750 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:10,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:10,954 INFO L427 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:10,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:10,954 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 255 times [2020-04-17 14:35:10,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:10,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35981051] [2020-04-17 14:35:10,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:11,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35981051] [2020-04-17 14:35:11,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857165214] [2020-04-17 14:35:11,165 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:11,226 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-04-17 14:35:11,226 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:11,227 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjunts are in the unsatisfiable core [2020-04-17 14:35:11,228 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:11,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:11,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:35:11,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240831198] [2020-04-17 14:35:11,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:35:11,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:11,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:35:11,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:35:11,243 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 25 states. [2020-04-17 14:35:12,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:12,162 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-04-17 14:35:12,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 14:35:12,163 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:35:12,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:12,163 INFO L225 Difference]: With dead ends: 137 [2020-04-17 14:35:12,163 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 14:35:12,164 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1172, Invalid=2860, Unknown=0, NotChecked=0, Total=4032 [2020-04-17 14:35:12,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 14:35:12,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2020-04-17 14:35:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-04-17 14:35:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-04-17 14:35:12,167 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 29 [2020-04-17 14:35:12,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:12,167 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-04-17 14:35:12,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:35:12,167 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-04-17 14:35:12,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:12,168 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:12,168 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:12,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:12,368 INFO L427 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:12,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:12,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1811401214, now seen corresponding path program 256 times [2020-04-17 14:35:12,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:12,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554525348] [2020-04-17 14:35:12,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:12,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:12,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554525348] [2020-04-17 14:35:12,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048422013] [2020-04-17 14:35:12,604 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:12,655 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:35:12,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:12,657 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:35:12,658 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:12,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:12,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:12,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:35:12,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447233001] [2020-04-17 14:35:12,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:12,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:12,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:12,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:12,694 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 26 states. [2020-04-17 14:35:13,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:13,835 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-04-17 14:35:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-17 14:35:13,835 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:35:13,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:13,836 INFO L225 Difference]: With dead ends: 134 [2020-04-17 14:35:13,836 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 14:35:13,836 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1181, Invalid=2979, Unknown=0, NotChecked=0, Total=4160 [2020-04-17 14:35:13,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 14:35:13,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 92. [2020-04-17 14:35:13,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-04-17 14:35:13,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-04-17 14:35:13,839 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 29 [2020-04-17 14:35:13,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:13,839 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-04-17 14:35:13,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:13,839 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-04-17 14:35:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:13,840 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:13,840 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:14,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:14,040 INFO L427 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:14,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:14,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 257 times [2020-04-17 14:35:14,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:14,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375495957] [2020-04-17 14:35:14,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:14,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:14,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375495957] [2020-04-17 14:35:14,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045909666] [2020-04-17 14:35:14,257 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:14,318 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-04-17 14:35:14,319 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:14,320 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:35:14,321 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:14,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:14,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:35:14,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190206358] [2020-04-17 14:35:14,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:35:14,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:14,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:35:14,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:35:14,337 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 25 states. [2020-04-17 14:35:15,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:15,299 INFO L93 Difference]: Finished difference Result 135 states and 323 transitions. [2020-04-17 14:35:15,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-04-17 14:35:15,299 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:35:15,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:15,300 INFO L225 Difference]: With dead ends: 135 [2020-04-17 14:35:15,300 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 14:35:15,301 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1302, Invalid=2988, Unknown=0, NotChecked=0, Total=4290 [2020-04-17 14:35:15,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 14:35:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2020-04-17 14:35:15,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-04-17 14:35:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-04-17 14:35:15,304 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 29 [2020-04-17 14:35:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:15,304 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-04-17 14:35:15,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:35:15,304 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-04-17 14:35:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:15,304 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:15,305 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:15,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:15,505 INFO L427 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:15,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:15,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1324318364, now seen corresponding path program 258 times [2020-04-17 14:35:15,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:15,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602088118] [2020-04-17 14:35:15,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:15,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602088118] [2020-04-17 14:35:15,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309206412] [2020-04-17 14:35:15,716 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:15,781 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-04-17 14:35:15,781 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:15,782 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjunts are in the unsatisfiable core [2020-04-17 14:35:15,782 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:15,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:15,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:35:15,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906895426] [2020-04-17 14:35:15,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:15,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:15,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:15,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:15,826 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-04-17 14:35:17,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:17,001 INFO L93 Difference]: Finished difference Result 132 states and 317 transitions. [2020-04-17 14:35:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-04-17 14:35:17,002 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:35:17,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:17,002 INFO L225 Difference]: With dead ends: 132 [2020-04-17 14:35:17,002 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 14:35:17,003 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1201, Invalid=3221, Unknown=0, NotChecked=0, Total=4422 [2020-04-17 14:35:17,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 14:35:17,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2020-04-17 14:35:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 14:35:17,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-04-17 14:35:17,005 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 29 [2020-04-17 14:35:17,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:17,006 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-04-17 14:35:17,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:17,006 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-04-17 14:35:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:17,006 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:17,006 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:17,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:17,207 INFO L427 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:17,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 259 times [2020-04-17 14:35:17,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:17,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174864616] [2020-04-17 14:35:17,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:17,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174864616] [2020-04-17 14:35:17,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375570397] [2020-04-17 14:35:17,422 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:17,480 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-04-17 14:35:17,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:17,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:17,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-04-17 14:35:17,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483906923] [2020-04-17 14:35:17,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-17 14:35:17,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:17,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-17 14:35:17,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-04-17 14:35:17,501 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 25 states. [2020-04-17 14:35:18,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:18,501 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-04-17 14:35:18,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-04-17 14:35:18,502 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-04-17 14:35:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:18,502 INFO L225 Difference]: With dead ends: 152 [2020-04-17 14:35:18,502 INFO L226 Difference]: Without dead ends: 146 [2020-04-17 14:35:18,503 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1448, Invalid=3108, Unknown=0, NotChecked=0, Total=4556 [2020-04-17 14:35:18,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-04-17 14:35:18,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-04-17 14:35:18,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-04-17 14:35:18,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 261 transitions. [2020-04-17 14:35:18,506 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 261 transitions. Word has length 29 [2020-04-17 14:35:18,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:18,506 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 261 transitions. [2020-04-17 14:35:18,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-17 14:35:18,506 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 261 transitions. [2020-04-17 14:35:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 14:35:18,506 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:18,507 INFO L425 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:18,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:18,710 INFO L427 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:18,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:18,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1323811514, now seen corresponding path program 260 times [2020-04-17 14:35:18,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:18,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379713615] [2020-04-17 14:35:18,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:18,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379713615] [2020-04-17 14:35:18,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481600050] [2020-04-17 14:35:18,918 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:18,970 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:35:18,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:18,972 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:18,973 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:19,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:19,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-04-17 14:35:19,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270097301] [2020-04-17 14:35:19,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:19,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:19,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:19,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:19,007 INFO L87 Difference]: Start difference. First operand 100 states and 261 transitions. Second operand 26 states. [2020-04-17 14:35:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:20,189 INFO L93 Difference]: Finished difference Result 133 states and 323 transitions. [2020-04-17 14:35:20,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-04-17 14:35:20,190 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-04-17 14:35:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:20,190 INFO L225 Difference]: With dead ends: 133 [2020-04-17 14:35:20,190 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 14:35:20,191 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1321, Invalid=3371, Unknown=0, NotChecked=0, Total=4692 [2020-04-17 14:35:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 14:35:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2020-04-17 14:35:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-04-17 14:35:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-04-17 14:35:20,194 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-04-17 14:35:20,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:20,194 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-04-17 14:35:20,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:20,194 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-04-17 14:35:20,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:20,195 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:20,195 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:20,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:20,398 INFO L427 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:20,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:20,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 261 times [2020-04-17 14:35:20,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:20,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311237580] [2020-04-17 14:35:20,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:20,695 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:20,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311237580] [2020-04-17 14:35:20,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118127601] [2020-04-17 14:35:20,695 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:20,755 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-04-17 14:35:20,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:20,756 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:20,757 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:20,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:20,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-04-17 14:35:20,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487929759] [2020-04-17 14:35:20,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:20,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:20,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:20,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:20,766 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-04-17 14:35:21,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:21,308 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-04-17 14:35:21,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 14:35:21,308 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-04-17 14:35:21,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:21,309 INFO L225 Difference]: With dead ends: 154 [2020-04-17 14:35:21,309 INFO L226 Difference]: Without dead ends: 148 [2020-04-17 14:35:21,309 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=717, Invalid=1635, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 14:35:21,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-04-17 14:35:21,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 99. [2020-04-17 14:35:21,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 14:35:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-04-17 14:35:21,312 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-04-17 14:35:21,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:21,312 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-04-17 14:35:21,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:21,312 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-04-17 14:35:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:21,313 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:21,313 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:21,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:21,514 INFO L427 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:21,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2085740573, now seen corresponding path program 262 times [2020-04-17 14:35:21,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:21,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457902221] [2020-04-17 14:35:21,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:21,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457902221] [2020-04-17 14:35:21,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065310731] [2020-04-17 14:35:21,818 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:21,867 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 14:35:21,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:21,869 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:21,869 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:21,886 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:21,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:21,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-04-17 14:35:21,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444397493] [2020-04-17 14:35:21,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 14:35:21,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:21,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 14:35:21,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:35:21,897 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-04-17 14:35:22,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:22,521 INFO L93 Difference]: Finished difference Result 151 states and 357 transitions. [2020-04-17 14:35:22,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 14:35:22,521 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-04-17 14:35:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:22,522 INFO L225 Difference]: With dead ends: 151 [2020-04-17 14:35:22,522 INFO L226 Difference]: Without dead ends: 145 [2020-04-17 14:35:22,522 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=770, Invalid=1882, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 14:35:22,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-04-17 14:35:22,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 98. [2020-04-17 14:35:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 14:35:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-04-17 14:35:22,525 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-04-17 14:35:22,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:22,525 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-04-17 14:35:22,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-17 14:35:22,525 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-04-17 14:35:22,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:22,526 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:22,526 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:22,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:22,727 INFO L427 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:22,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:22,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 263 times [2020-04-17 14:35:22,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:22,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472430209] [2020-04-17 14:35:22,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:23,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472430209] [2020-04-17 14:35:23,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335342714] [2020-04-17 14:35:23,020 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:23,079 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-04-17 14:35:23,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:23,080 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:23,081 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:23,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:23,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-04-17 14:35:23,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985270326] [2020-04-17 14:35:23,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:23,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:23,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:23,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:23,090 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-04-17 14:35:23,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:23,689 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-04-17 14:35:23,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 14:35:23,690 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-04-17 14:35:23,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:23,690 INFO L225 Difference]: With dead ends: 148 [2020-04-17 14:35:23,690 INFO L226 Difference]: Without dead ends: 142 [2020-04-17 14:35:23,691 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=720, Invalid=1830, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 14:35:23,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-04-17 14:35:23,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2020-04-17 14:35:23,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 14:35:23,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-04-17 14:35:23,694 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-04-17 14:35:23,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:23,694 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-04-17 14:35:23,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:23,694 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-04-17 14:35:23,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:23,695 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:23,695 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:23,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:23,899 INFO L427 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:23,900 INFO L82 PathProgramCache]: Analyzing trace with hash 778774399, now seen corresponding path program 264 times [2020-04-17 14:35:23,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:23,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158517238] [2020-04-17 14:35:23,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:24,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158517238] [2020-04-17 14:35:24,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105159897] [2020-04-17 14:35:24,198 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:24,261 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-04-17 14:35:24,261 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:24,262 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:24,263 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:24,280 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:24,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:24,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-04-17 14:35:24,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416822527] [2020-04-17 14:35:24,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 14:35:24,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:24,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 14:35:24,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:35:24,295 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-04-17 14:35:24,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:24,979 INFO L93 Difference]: Finished difference Result 147 states and 349 transitions. [2020-04-17 14:35:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 14:35:24,980 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-04-17 14:35:24,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:24,980 INFO L225 Difference]: With dead ends: 147 [2020-04-17 14:35:24,980 INFO L226 Difference]: Without dead ends: 141 [2020-04-17 14:35:24,981 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=2082, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 14:35:24,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-04-17 14:35:24,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2020-04-17 14:35:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 14:35:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-04-17 14:35:24,983 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-04-17 14:35:24,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:24,984 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-04-17 14:35:24,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-17 14:35:24,984 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-04-17 14:35:24,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:24,984 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:24,984 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:25,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:25,185 INFO L427 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:25,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:25,185 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 265 times [2020-04-17 14:35:25,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:25,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823595393] [2020-04-17 14:35:25,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:25,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823595393] [2020-04-17 14:35:25,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363234725] [2020-04-17 14:35:25,461 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:25,520 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:25,521 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:25,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:25,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-04-17 14:35:25,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185629136] [2020-04-17 14:35:25,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-04-17 14:35:25,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:25,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-04-17 14:35:25,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-04-17 14:35:25,531 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-04-17 14:35:26,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:26,172 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-04-17 14:35:26,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 14:35:26,172 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-04-17 14:35:26,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:26,173 INFO L225 Difference]: With dead ends: 144 [2020-04-17 14:35:26,173 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 14:35:26,174 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=739, Invalid=2017, Unknown=0, NotChecked=0, Total=2756 [2020-04-17 14:35:26,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 14:35:26,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2020-04-17 14:35:26,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-04-17 14:35:26,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-04-17 14:35:26,176 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-04-17 14:35:26,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:26,177 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-04-17 14:35:26,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-04-17 14:35:26,177 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-04-17 14:35:26,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:26,177 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:26,177 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 14:35:26,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:26,378 INFO L427 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:26,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:26,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1953308831, now seen corresponding path program 266 times [2020-04-17 14:35:26,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:26,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405051110] [2020-04-17 14:35:26,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 14:35:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:26,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405051110] [2020-04-17 14:35:26,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849597037] [2020-04-17 14:35:26,658 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:26,713 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 14:35:26,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:26,714 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:26,715 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:26,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 14:35:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 14:35:26,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 14:35:26,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-04-17 14:35:26,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763490170] [2020-04-17 14:35:26,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-17 14:35:26,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 14:35:26,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-17 14:35:26,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-04-17 14:35:26,749 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-04-17 14:35:27,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 14:35:27,507 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-04-17 14:35:27,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 14:35:27,507 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-04-17 14:35:27,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 14:35:27,508 INFO L225 Difference]: With dead ends: 143 [2020-04-17 14:35:27,508 INFO L226 Difference]: Without dead ends: 137 [2020-04-17 14:35:27,508 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=806, Invalid=2274, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 14:35:27,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-04-17 14:35:27,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2020-04-17 14:35:27,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 14:35:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-04-17 14:35:27,511 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-04-17 14:35:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 14:35:27,511 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-04-17 14:35:27,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-17 14:35:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-04-17 14:35:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-17 14:35:27,511 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 14:35:27,511 INFO L425 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] Received shutdown request... [2020-04-17 14:35:27,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:27,712 INFO L427 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 14:35:27,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 14:35:27,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 267 times [2020-04-17 14:35:27,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 14:35:27,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753124648] [2020-04-17 14:35:27,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 14:35:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2020-04-17 14:35:27,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580056815] [2020-04-17 14:35:27,718 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:27,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-04-17 14:35:27,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 14:35:27,781 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-04-17 14:35:27,782 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 14:35:27,785 WARN L209 SmtUtils]: Removed 1 from assertion stack [2020-04-17 14:35:27,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 14:35:27,986 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 14:35:27,991 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 14:35:27,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 02:35:27 BasicIcfg [2020-04-17 14:35:27,991 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 14:35:27,994 INFO L168 Benchmark]: Toolchain (without parser) took 273490.46 ms. Allocated memory was 149.9 MB in the beginning and 285.7 MB in the end (delta: 135.8 MB). Free memory was 106.2 MB in the beginning and 102.8 MB in the end (delta: 3.4 MB). Peak memory consumption was 139.2 MB. Max. memory is 7.1 GB. [2020-04-17 14:35:27,994 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 149.9 MB. Free memory was 126.3 MB in the beginning and 126.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-17 14:35:27,995 INFO L168 Benchmark]: CACSL2BoogieTranslator took 822.12 ms. Allocated memory was 149.9 MB in the beginning and 207.1 MB in the end (delta: 57.1 MB). Free memory was 104.2 MB in the beginning and 164.3 MB in the end (delta: -60.1 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-04-17 14:35:27,995 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.10 ms. Allocated memory is still 207.1 MB. Free memory was 164.3 MB in the beginning and 162.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2020-04-17 14:35:27,997 INFO L168 Benchmark]: Boogie Preprocessor took 31.98 ms. Allocated memory is still 207.1 MB. Free memory was 162.4 MB in the beginning and 161.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-04-17 14:35:27,998 INFO L168 Benchmark]: RCFGBuilder took 440.45 ms. Allocated memory is still 207.1 MB. Free memory was 161.2 MB in the beginning and 141.1 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-04-17 14:35:27,998 INFO L168 Benchmark]: TraceAbstraction took 272118.01 ms. Allocated memory was 207.1 MB in the beginning and 285.7 MB in the end (delta: 78.6 MB). Free memory was 140.5 MB in the beginning and 102.8 MB in the end (delta: 37.7 MB). Peak memory consumption was 116.3 MB. Max. memory is 7.1 GB. [2020-04-17 14:35:28,000 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 149.9 MB. Free memory was 126.3 MB in the beginning and 126.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 822.12 ms. Allocated memory was 149.9 MB in the beginning and 207.1 MB in the end (delta: 57.1 MB). Free memory was 104.2 MB in the beginning and 164.3 MB in the end (delta: -60.1 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 57.10 ms. Allocated memory is still 207.1 MB. Free memory was 164.3 MB in the beginning and 162.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.98 ms. Allocated memory is still 207.1 MB. Free memory was 162.4 MB in the beginning and 161.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 440.45 ms. Allocated memory is still 207.1 MB. Free memory was 161.2 MB in the beginning and 141.1 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 272118.01 ms. Allocated memory was 207.1 MB in the beginning and 285.7 MB in the end (delta: 78.6 MB). Free memory was 140.5 MB in the beginning and 102.8 MB in the end (delta: 37.7 MB). Peak memory consumption was 116.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was analyzing trace of length 31 with TraceHistMax 11,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 272.0s, OverallIterations: 269, TraceHistogramMax: 11, AutomataDifference: 150.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 4263 SDtfs, 15583 SDslu, 29718 SDs, 0 SdLazy, 32656 SolverSat, 19014 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15966 GetRequests, 5223 SyntacticMatches, 263 SemanticMatches, 10480 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112988 ImplicationChecksByTransitivity, 148.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=261, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 268 MinimizatonAttempts, 7356 StatesRemovedByMinimization, 267 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.2s SsaConstructionTime, 6.4s SatisfiabilityAnalysisTime, 48.3s InterpolantComputationTime, 11824 NumberOfCodeBlocks, 11824 NumberOfCodeBlocksAsserted, 1464 NumberOfCheckSat, 11293 ConstructedInterpolants, 0 QuantifiedInterpolants, 1172645 SizeOfPredicates, 3802 NumberOfNonLiveVariables, 35762 ConjunctsInSsa, 4904 ConjunctsInUnsatCore, 531 InterpolantComputations, 5 PerfectInterpolantSequences, 0/26950 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