/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 23:02:08,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 23:02:08,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 23:02:08,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 23:02:08,543 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 23:02:08,544 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 23:02:08,545 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 23:02:08,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 23:02:08,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 23:02:08,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 23:02:08,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 23:02:08,552 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 23:02:08,552 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 23:02:08,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 23:02:08,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 23:02:08,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 23:02:08,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 23:02:08,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 23:02:08,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 23:02:08,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 23:02:08,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 23:02:08,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 23:02:08,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 23:02:08,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 23:02:08,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 23:02:08,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 23:02:08,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 23:02:08,569 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 23:02:08,570 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 23:02:08,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 23:02:08,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 23:02:08,572 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 23:02:08,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 23:02:08,573 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 23:02:08,574 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 23:02:08,575 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 23:02:08,575 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 23:02:08,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 23:02:08,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 23:02:08,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 23:02:08,577 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 23:02:08,578 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf [2020-04-17 23:02:08,593 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 23:02:08,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 23:02:08,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 23:02:08,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 23:02:08,595 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 23:02:08,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 23:02:08,595 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 23:02:08,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 23:02:08,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 23:02:08,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 23:02:08,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 23:02:08,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 23:02:08,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 23:02:08,596 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 23:02:08,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 23:02:08,597 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 23:02:08,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 23:02:08,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 23:02:08,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 23:02:08,598 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 23:02:08,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 23:02:08,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 23:02:08,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 23:02:08,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 23:02:08,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 23:02:08,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 23:02:08,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 23:02:08,599 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-04-17 23:02:08,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 23:02:08,600 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 23:02:08,902 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 23:02:08,916 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 23:02:08,921 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 23:02:08,922 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 23:02:08,922 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 23:02:08,923 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-04-17 23:02:08,992 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f52669e2a/f974e85eea504aa8aedc6d967d8a5b8d/FLAG7d4b37bef [2020-04-17 23:02:09,469 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 23:02:09,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-04-17 23:02:09,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f52669e2a/f974e85eea504aa8aedc6d967d8a5b8d/FLAG7d4b37bef [2020-04-17 23:02:09,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f52669e2a/f974e85eea504aa8aedc6d967d8a5b8d [2020-04-17 23:02:09,846 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 23:02:09,867 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 23:02:09,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 23:02:09,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 23:02:09,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 23:02:09,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 11:02:09" (1/1) ... [2020-04-17 23:02:09,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c57c664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:09, skipping insertion in model container [2020-04-17 23:02:09,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 11:02:09" (1/1) ... [2020-04-17 23:02:09,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 23:02:09,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 23:02:10,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 23:02:10,418 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 23:02:10,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 23:02:10,530 INFO L208 MainTranslator]: Completed translation [2020-04-17 23:02:10,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:10 WrapperNode [2020-04-17 23:02:10,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 23:02:10,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 23:02:10,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 23:02:10,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 23:02:10,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:10" (1/1) ... [2020-04-17 23:02:10,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:10" (1/1) ... [2020-04-17 23:02:10,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 23:02:10,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 23:02:10,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 23:02:10,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 23:02:10,604 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:10" (1/1) ... [2020-04-17 23:02:10,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:10" (1/1) ... [2020-04-17 23:02:10,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:10" (1/1) ... [2020-04-17 23:02:10,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:10" (1/1) ... [2020-04-17 23:02:10,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:10" (1/1) ... [2020-04-17 23:02:10,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:10" (1/1) ... [2020-04-17 23:02:10,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:10" (1/1) ... [2020-04-17 23:02:10,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 23:02:10,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 23:02:10,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 23:02:10,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 23:02:10,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:10" (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 23:02:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-04-17 23:02:10,698 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-04-17 23:02:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-04-17 23:02:10,698 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-04-17 23:02:10,699 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 23:02:10,699 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-04-17 23:02:10,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 23:02:10,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 23:02:10,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-04-17 23:02:10,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 23:02:10,702 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 23:02:10,704 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 23:02:11,146 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 23:02:11,147 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-17 23:02:11,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 11:02:11 BoogieIcfgContainer [2020-04-17 23:02:11,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 23:02:11,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 23:02:11,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 23:02:11,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 23:02:11,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 11:02:09" (1/3) ... [2020-04-17 23:02:11,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6b8090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 11:02:11, skipping insertion in model container [2020-04-17 23:02:11,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 11:02:10" (2/3) ... [2020-04-17 23:02:11,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6b8090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 11:02:11, skipping insertion in model container [2020-04-17 23:02:11,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 11:02:11" (3/3) ... [2020-04-17 23:02:11,159 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-04-17 23:02:11,170 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 23:02:11,170 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 23:02:11,177 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 23:02:11,179 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 23:02:11,204 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,205 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,205 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,207 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,208 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,208 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,208 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,209 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,209 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,209 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,209 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,210 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,210 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,210 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,211 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,211 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,211 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,212 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,212 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,212 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,212 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,213 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,213 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,214 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,214 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,214 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,214 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,215 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,219 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,219 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,219 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,220 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,220 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,220 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,226 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,226 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,226 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,226 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,227 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,227 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 23:02:11,241 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-17 23:02:11,258 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 23:02:11,258 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 23:02:11,258 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 23:02:11,258 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 23:02:11,259 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 23:02:11,259 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 23:02:11,259 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 23:02:11,259 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 23:02:11,279 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-04-17 23:02:11,281 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-17 23:02:11,327 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-17 23:02:11,328 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 23:02:11,333 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 23:02:11,337 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-04-17 23:02:11,353 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-04-17 23:02:11,354 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-04-17 23:02:11,355 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 23:02:11,357 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-04-17 23:02:11,358 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-04-17 23:02:12,486 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-04-17 23:02:12,735 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-04-17 23:02:12,735 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-04-17 23:02:12,738 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-04-17 23:02:12,754 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-04-17 23:02:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-04-17 23:02:12,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-04-17 23:02:12,764 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:12,765 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-04-17 23:02:12,766 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:12,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:12,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-04-17 23:02:12,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:12,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559464726] [2020-04-17 23:02:12,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:12,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:13,149 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 23:02:13,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559464726] [2020-04-17 23:02:13,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:02:13,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 23:02:13,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700818776] [2020-04-17 23:02:13,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 23:02:13,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:13,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 23:02:13,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-04-17 23:02:13,180 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-04-17 23:02:13,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:13,279 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-04-17 23:02:13,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 23:02:13,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-04-17 23:02:13,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:13,293 INFO L225 Difference]: With dead ends: 75 [2020-04-17 23:02:13,293 INFO L226 Difference]: Without dead ends: 42 [2020-04-17 23:02:13,294 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 23:02:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-04-17 23:02:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-04-17 23:02:13,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 23:02:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-04-17 23:02:13,330 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-04-17 23:02:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:13,330 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-04-17 23:02:13,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 23:02:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-04-17 23:02:13,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-04-17 23:02:13,332 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:13,332 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:13,332 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:13,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-04-17 23:02:13,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:13,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110413627] [2020-04-17 23:02:13,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:13,404 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 23:02:13,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110413627] [2020-04-17 23:02:13,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:02:13,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 23:02:13,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100704335] [2020-04-17 23:02:13,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-04-17 23:02:13,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:13,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-04-17 23:02:13,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-04-17 23:02:13,408 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-04-17 23:02:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:13,448 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-04-17 23:02:13,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 23:02:13,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-04-17 23:02:13,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:13,450 INFO L225 Difference]: With dead ends: 56 [2020-04-17 23:02:13,450 INFO L226 Difference]: Without dead ends: 50 [2020-04-17 23:02:13,451 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 23:02:13,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-17 23:02:13,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-04-17 23:02:13,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 23:02:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-04-17 23:02:13,459 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-04-17 23:02:13,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:13,460 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-04-17 23:02:13,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-04-17 23:02:13,460 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-04-17 23:02:13,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 23:02:13,461 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:13,461 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:13,462 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:13,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:13,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-04-17 23:02:13,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:13,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057149270] [2020-04-17 23:02:13,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:13,541 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 23:02:13,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057149270] [2020-04-17 23:02:13,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:02:13,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 23:02:13,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943051078] [2020-04-17 23:02:13,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 23:02:13,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:13,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 23:02:13,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-17 23:02:13,545 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-04-17 23:02:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:13,659 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-04-17 23:02:13,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 23:02:13,660 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 23:02:13,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:13,661 INFO L225 Difference]: With dead ends: 78 [2020-04-17 23:02:13,662 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 23:02:13,662 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 23:02:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 23:02:13,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-04-17 23:02:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:13,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 23:02:13,674 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-04-17 23:02:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:13,674 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 23:02:13,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 23:02:13,674 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 23:02:13,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 23:02:13,677 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:13,677 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:13,677 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:13,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-04-17 23:02:13,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:13,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162899925] [2020-04-17 23:02:13,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:13,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:13,805 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 23:02:13,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162899925] [2020-04-17 23:02:13,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:02:13,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 23:02:13,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911928676] [2020-04-17 23:02:13,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 23:02:13,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:13,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 23:02:13,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-17 23:02:13,808 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-04-17 23:02:13,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:13,910 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-04-17 23:02:13,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 23:02:13,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 23:02:13,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:13,912 INFO L225 Difference]: With dead ends: 54 [2020-04-17 23:02:13,913 INFO L226 Difference]: Without dead ends: 43 [2020-04-17 23:02:13,913 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:13,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-17 23:02:13,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-04-17 23:02:13,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-17 23:02:13,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-04-17 23:02:13,919 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-04-17 23:02:13,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:13,919 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-04-17 23:02:13,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 23:02:13,919 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-04-17 23:02:13,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 23:02:13,920 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:13,920 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:13,921 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:13,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:13,921 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-04-17 23:02:13,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:13,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460742863] [2020-04-17 23:02:13,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:13,974 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 23:02:13,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460742863] [2020-04-17 23:02:13,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 23:02:13,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-04-17 23:02:13,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518595196] [2020-04-17 23:02:13,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-04-17 23:02:13,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:13,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-04-17 23:02:13,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-04-17 23:02:13,977 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-04-17 23:02:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:14,063 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-04-17 23:02:14,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 23:02:14,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-04-17 23:02:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:14,070 INFO L225 Difference]: With dead ends: 57 [2020-04-17 23:02:14,071 INFO L226 Difference]: Without dead ends: 51 [2020-04-17 23:02:14,071 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:14,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-04-17 23:02:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-04-17 23:02:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 23:02:14,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-04-17 23:02:14,076 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-04-17 23:02:14,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:14,077 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-04-17 23:02:14,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-04-17 23:02:14,077 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-04-17 23:02:14,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 23:02:14,078 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:14,078 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:14,078 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:14,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:14,079 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-04-17 23:02:14,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:14,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122397742] [2020-04-17 23:02:14,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:14,150 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 23:02:14,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122397742] [2020-04-17 23:02:14,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274192523] [2020-04-17 23:02:14,155 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 23:02:14,222 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:14,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:14,225 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 23:02:14,229 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:14,265 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:14,276 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 23:02:14,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:14,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 23:02:14,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522892400] [2020-04-17 23:02:14,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:14,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:14,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:14,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-04-17 23:02:14,278 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-04-17 23:02:14,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:14,396 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-04-17 23:02:14,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 23:02:14,396 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 23:02:14,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:14,397 INFO L225 Difference]: With dead ends: 48 [2020-04-17 23:02:14,397 INFO L226 Difference]: Without dead ends: 43 [2020-04-17 23:02:14,398 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 23:02:14,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-04-17 23:02:14,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-04-17 23:02:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-04-17 23:02:14,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-04-17 23:02:14,403 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-04-17 23:02:14,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:14,403 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-04-17 23:02:14,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:14,403 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-04-17 23:02:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 23:02:14,404 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:14,404 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:14,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:14,608 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:14,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:14,608 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-04-17 23:02:14,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:14,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623692575] [2020-04-17 23:02:14,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:14,682 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 23:02:14,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623692575] [2020-04-17 23:02:14,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986203017] [2020-04-17 23:02:14,683 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 23:02:14,740 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:14,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:14,741 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 23:02:14,743 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:14,760 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 23:02:14,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:14,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-17 23:02:14,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31750130] [2020-04-17 23:02:14,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 23:02:14,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:14,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 23:02:14,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-04-17 23:02:14,774 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-04-17 23:02:14,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:14,856 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-04-17 23:02:14,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 23:02:14,857 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-04-17 23:02:14,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:14,858 INFO L225 Difference]: With dead ends: 54 [2020-04-17 23:02:14,858 INFO L226 Difference]: Without dead ends: 48 [2020-04-17 23:02:14,859 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 23:02:14,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-04-17 23:02:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-04-17 23:02:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 23:02:14,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-04-17 23:02:14,866 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-04-17 23:02:14,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:14,866 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-04-17 23:02:14,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 23:02:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-04-17 23:02:14,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 23:02:14,867 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:14,867 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:15,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:15,069 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:15,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:15,069 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-04-17 23:02:15,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:15,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828945957] [2020-04-17 23:02:15,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:15,129 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 23:02:15,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828945957] [2020-04-17 23:02:15,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232503520] [2020-04-17 23:02:15,130 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 23:02:15,185 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 23:02:15,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:15,187 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 23:02:15,188 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:15,212 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:15,219 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 23:02:15,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:15,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 23:02:15,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614697539] [2020-04-17 23:02:15,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:15,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:15,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:15,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 23:02:15,222 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-04-17 23:02:15,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:15,359 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-04-17 23:02:15,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 23:02:15,359 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 23:02:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:15,360 INFO L225 Difference]: With dead ends: 58 [2020-04-17 23:02:15,360 INFO L226 Difference]: Without dead ends: 52 [2020-04-17 23:02:15,361 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 23:02:15,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-04-17 23:02:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-04-17 23:02:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-04-17 23:02:15,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-04-17 23:02:15,371 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-04-17 23:02:15,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:15,374 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-04-17 23:02:15,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:15,374 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-04-17 23:02:15,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 23:02:15,375 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:15,375 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:15,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:15,580 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:15,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:15,581 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-04-17 23:02:15,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:15,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241408738] [2020-04-17 23:02:15,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:15,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:15,659 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 23:02:15,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241408738] [2020-04-17 23:02:15,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596084749] [2020-04-17 23:02:15,660 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 23:02:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:15,712 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 23:02:15,713 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:15,751 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 23:02:15,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:15,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-04-17 23:02:15,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946205366] [2020-04-17 23:02:15,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-04-17 23:02:15,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:15,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-04-17 23:02:15,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-04-17 23:02:15,754 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-04-17 23:02:15,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:15,894 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-04-17 23:02:15,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:15,895 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-04-17 23:02:15,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:15,896 INFO L225 Difference]: With dead ends: 78 [2020-04-17 23:02:15,896 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 23:02:15,896 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 23:02:15,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 23:02:15,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-04-17 23:02:15,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-04-17 23:02:15,902 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-04-17 23:02:15,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:15,902 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-04-17 23:02:15,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-04-17 23:02:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-04-17 23:02:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-04-17 23:02:15,907 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:15,907 INFO L425 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:16,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:16,111 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:16,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:16,112 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-04-17 23:02:16,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:16,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818486526] [2020-04-17 23:02:16,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:16,178 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 23:02:16,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818486526] [2020-04-17 23:02:16,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687226122] [2020-04-17 23:02:16,179 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 23:02:16,225 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:16,226 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:16,226 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 23:02:16,228 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:16,278 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:16,289 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 23:02:16,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:16,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-04-17 23:02:16,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285033202] [2020-04-17 23:02:16,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:16,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:16,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:16,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-04-17 23:02:16,291 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-04-17 23:02:16,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:16,464 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-04-17 23:02:16,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 23:02:16,475 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-04-17 23:02:16,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:16,476 INFO L225 Difference]: With dead ends: 62 [2020-04-17 23:02:16,476 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 23:02:16,477 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:16,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 23:02:16,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-04-17 23:02:16,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-04-17 23:02:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-04-17 23:02:16,482 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-04-17 23:02:16,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:16,482 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-04-17 23:02:16,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:16,482 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-04-17 23:02:16,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 23:02:16,483 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:16,483 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:16,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:16,689 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:16,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:16,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-04-17 23:02:16,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:16,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945300394] [2020-04-17 23:02:16,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:16,765 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 23:02:16,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945300394] [2020-04-17 23:02:16,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407659672] [2020-04-17 23:02:16,766 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 23:02:16,815 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-04-17 23:02:16,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:16,817 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:16,819 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:16,829 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 23:02:16,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:16,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-17 23:02:16,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724959946] [2020-04-17 23:02:16,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:16,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:16,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:16,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-04-17 23:02:16,831 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-04-17 23:02:16,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:16,954 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-04-17 23:02:16,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 23:02:16,955 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-04-17 23:02:16,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:16,955 INFO L225 Difference]: With dead ends: 64 [2020-04-17 23:02:16,956 INFO L226 Difference]: Without dead ends: 58 [2020-04-17 23:02:16,956 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 23:02:16,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-04-17 23:02:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-04-17 23:02:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-17 23:02:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-04-17 23:02:16,960 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-04-17 23:02:16,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:16,961 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-04-17 23:02:16,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:16,961 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-04-17 23:02:16,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 23:02:16,962 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:16,962 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:17,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:17,166 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:17,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:17,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-04-17 23:02:17,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:17,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62512154] [2020-04-17 23:02:17,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:17,253 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 23:02:17,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62512154] [2020-04-17 23:02:17,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705630996] [2020-04-17 23:02:17,254 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 23:02:17,316 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:17,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:17,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:17,326 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:17,367 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:17,381 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 23:02:17,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:17,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 23:02:17,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123910994] [2020-04-17 23:02:17,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:17,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:17,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:17,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:17,385 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-04-17 23:02:17,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:17,558 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-04-17 23:02:17,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 23:02:17,558 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 23:02:17,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:17,559 INFO L225 Difference]: With dead ends: 61 [2020-04-17 23:02:17,559 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 23:02:17,559 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:02:17,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 23:02:17,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-04-17 23:02:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-17 23:02:17,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-04-17 23:02:17,568 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-04-17 23:02:17,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:17,569 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-04-17 23:02:17,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:17,569 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-04-17 23:02:17,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 23:02:17,570 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:17,570 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:17,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:17,776 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:17,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:17,776 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-04-17 23:02:17,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:17,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548502511] [2020-04-17 23:02:17,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:17,831 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 23:02:17,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548502511] [2020-04-17 23:02:17,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598500363] [2020-04-17 23:02:17,832 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 23:02:17,876 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:17,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:17,877 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:17,878 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:17,887 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 23:02:17,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:17,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-04-17 23:02:17,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474827475] [2020-04-17 23:02:17,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-17 23:02:17,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:17,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-17 23:02:17,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-04-17 23:02:17,889 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-04-17 23:02:18,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:18,028 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-04-17 23:02:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:18,029 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-04-17 23:02:18,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:18,030 INFO L225 Difference]: With dead ends: 77 [2020-04-17 23:02:18,031 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 23:02:18,031 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 23:02:18,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 23:02:18,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-04-17 23:02:18,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-17 23:02:18,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-04-17 23:02:18,036 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-04-17 23:02:18,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:18,036 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-04-17 23:02:18,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-17 23:02:18,036 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-04-17 23:02:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 23:02:18,037 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:18,037 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:18,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:18,243 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:18,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:18,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-04-17 23:02:18,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:18,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514581050] [2020-04-17 23:02:18,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:18,312 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 23:02:18,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514581050] [2020-04-17 23:02:18,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984478674] [2020-04-17 23:02:18,313 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 23:02:18,364 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-04-17 23:02:18,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:18,365 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:18,366 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:18,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:18,393 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 23:02:18,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:18,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 23:02:18,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367173137] [2020-04-17 23:02:18,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:18,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:18,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:18,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:18,395 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-04-17 23:02:18,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:18,644 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-04-17 23:02:18,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:02:18,649 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 23:02:18,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:18,650 INFO L225 Difference]: With dead ends: 58 [2020-04-17 23:02:18,650 INFO L226 Difference]: Without dead ends: 50 [2020-04-17 23:02:18,651 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:02:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-04-17 23:02:18,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-04-17 23:02:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-04-17 23:02:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-04-17 23:02:18,654 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-04-17 23:02:18,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:18,654 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-04-17 23:02:18,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:18,654 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-04-17 23:02:18,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-04-17 23:02:18,655 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:18,655 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:18,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:18,859 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:18,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:18,859 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-04-17 23:02:18,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:18,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076238555] [2020-04-17 23:02:18,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:18,953 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 23:02:18,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076238555] [2020-04-17 23:02:18,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065010487] [2020-04-17 23:02:18,957 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 23:02:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:18,997 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 23:02:18,998 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:19,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:19,023 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 23:02:19,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:19,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-04-17 23:02:19,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258457691] [2020-04-17 23:02:19,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:19,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:19,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:19,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:19,025 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-04-17 23:02:19,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:19,226 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-04-17 23:02:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:19,227 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-04-17 23:02:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:19,228 INFO L225 Difference]: With dead ends: 60 [2020-04-17 23:02:19,228 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 23:02:19,229 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:02:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 23:02:19,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-04-17 23:02:19,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 23:02:19,233 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-04-17 23:02:19,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:19,233 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 23:02:19,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:19,233 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 23:02:19,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:19,234 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:19,234 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:19,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:19,440 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:19,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:19,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-04-17 23:02:19,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:19,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485822697] [2020-04-17 23:02:19,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:19,511 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 23:02:19,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485822697] [2020-04-17 23:02:19,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123827783] [2020-04-17 23:02:19,512 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 23:02:19,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:19,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:19,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:19,566 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:19,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:19,594 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 23:02:19,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:19,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 23:02:19,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098696876] [2020-04-17 23:02:19,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:19,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:19,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:19,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:19,597 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-04-17 23:02:19,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:19,799 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-04-17 23:02:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:19,805 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 23:02:19,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:19,806 INFO L225 Difference]: With dead ends: 54 [2020-04-17 23:02:19,806 INFO L226 Difference]: Without dead ends: 49 [2020-04-17 23:02:19,807 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:02:19,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-04-17 23:02:19,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-04-17 23:02:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-04-17 23:02:19,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-04-17 23:02:19,809 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-04-17 23:02:19,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:19,810 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-04-17 23:02:19,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:19,810 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-04-17 23:02:19,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:19,811 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:19,811 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:20,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:20,014 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:20,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:20,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-04-17 23:02:20,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:20,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589643382] [2020-04-17 23:02:20,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:20,131 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 23:02:20,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589643382] [2020-04-17 23:02:20,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554417223] [2020-04-17 23:02:20,132 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 23:02:20,180 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:02:20,180 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:20,181 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:20,182 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:20,190 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 23:02:20,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:20,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 23:02:20,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472642490] [2020-04-17 23:02:20,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:20,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:20,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:20,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:20,192 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-04-17 23:02:20,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:20,294 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-04-17 23:02:20,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 23:02:20,295 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 23:02:20,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:20,296 INFO L225 Difference]: With dead ends: 60 [2020-04-17 23:02:20,296 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 23:02:20,296 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 23:02:20,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-04-17 23:02:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-04-17 23:02:20,300 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-04-17 23:02:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:20,300 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-04-17 23:02:20,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:20,300 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-04-17 23:02:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:20,301 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:20,301 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:20,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:20,505 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:20,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:20,506 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-04-17 23:02:20,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:20,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607335024] [2020-04-17 23:02:20,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:20,592 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 23:02:20,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607335024] [2020-04-17 23:02:20,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996342885] [2020-04-17 23:02:20,592 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 23:02:20,665 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:20,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:20,666 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:20,667 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:20,691 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:20,699 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 23:02:20,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:20,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 23:02:20,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316852513] [2020-04-17 23:02:20,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:20,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:20,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:20,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:20,701 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-04-17 23:02:20,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:20,850 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-04-17 23:02:20,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-04-17 23:02:20,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 23:02:20,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:20,851 INFO L225 Difference]: With dead ends: 66 [2020-04-17 23:02:20,851 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 23:02:20,852 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 23:02:20,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 23:02:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-04-17 23:02:20,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-04-17 23:02:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-04-17 23:02:20,855 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-04-17 23:02:20,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:20,855 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-04-17 23:02:20,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-04-17 23:02:20,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:20,856 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:20,856 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:21,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:21,059 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:21,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:21,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-04-17 23:02:21,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:21,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178306951] [2020-04-17 23:02:21,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:21,160 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 23:02:21,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178306951] [2020-04-17 23:02:21,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572106874] [2020-04-17 23:02:21,161 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 23:02:21,217 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:02:21,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:21,218 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:21,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:21,239 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 23:02:21,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:21,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 23:02:21,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231762918] [2020-04-17 23:02:21,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:21,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:21,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:21,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:21,241 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-04-17 23:02:21,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:21,413 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-04-17 23:02:21,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:02:21,413 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 23:02:21,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:21,414 INFO L225 Difference]: With dead ends: 67 [2020-04-17 23:02:21,414 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 23:02:21,415 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 23:02:21,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 23:02:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-04-17 23:02:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-04-17 23:02:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-04-17 23:02:21,421 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-04-17 23:02:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:21,421 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-04-17 23:02:21,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-04-17 23:02:21,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:21,422 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:21,422 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:21,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:21,626 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:21,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-04-17 23:02:21,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:21,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172430598] [2020-04-17 23:02:21,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:21,697 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 23:02:21,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172430598] [2020-04-17 23:02:21,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844137242] [2020-04-17 23:02:21,698 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 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 23:02:21,738 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:02:21,738 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:21,739 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:21,740 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:21,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:21,775 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 23:02:21,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:21,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 23:02:21,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099472009] [2020-04-17 23:02:21,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:21,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:21,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:21,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:21,777 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-04-17 23:02:21,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:21,984 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-04-17 23:02:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:02:21,985 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 23:02:21,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:21,985 INFO L225 Difference]: With dead ends: 69 [2020-04-17 23:02:21,985 INFO L226 Difference]: Without dead ends: 63 [2020-04-17 23:02:21,986 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:02:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-17 23:02:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-04-17 23:02:21,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:21,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-04-17 23:02:21,988 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-04-17 23:02:21,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:21,988 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-04-17 23:02:21,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:21,989 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-04-17 23:02:21,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:21,989 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:21,989 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:22,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:22,190 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:22,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:22,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-04-17 23:02:22,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:22,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59559028] [2020-04-17 23:02:22,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:22,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59559028] [2020-04-17 23:02:22,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576393374] [2020-04-17 23:02:22,271 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 23:02:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:22,336 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:22,338 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:22,356 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 23:02:22,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:22,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-04-17 23:02:22,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689575553] [2020-04-17 23:02:22,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-04-17 23:02:22,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:22,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-04-17 23:02:22,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-04-17 23:02:22,358 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-04-17 23:02:22,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:22,591 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-04-17 23:02:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:22,596 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-04-17 23:02:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:22,597 INFO L225 Difference]: With dead ends: 88 [2020-04-17 23:02:22,597 INFO L226 Difference]: Without dead ends: 82 [2020-04-17 23:02:22,598 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:02:22,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-04-17 23:02:22,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-04-17 23:02:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 23:02:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-04-17 23:02:22,609 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-04-17 23:02:22,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:22,609 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-04-17 23:02:22,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-04-17 23:02:22,609 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-04-17 23:02:22,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-04-17 23:02:22,610 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:22,610 INFO L425 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:22,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:22,815 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:22,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-04-17 23:02:22,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:22,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332427770] [2020-04-17 23:02:22,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:22,876 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 23:02:22,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332427770] [2020-04-17 23:02:22,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275056671] [2020-04-17 23:02:22,889 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 23:02:22,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:22,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:22,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 23:02:22,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:22,968 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:22,982 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 23:02:22,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:22,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-04-17 23:02:22,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212866332] [2020-04-17 23:02:22,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:22,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:22,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:22,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:22,985 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-04-17 23:02:23,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:23,242 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-04-17 23:02:23,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:23,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-04-17 23:02:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:23,243 INFO L225 Difference]: With dead ends: 69 [2020-04-17 23:02:23,244 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 23:02:23,244 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:02:23,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 23:02:23,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-04-17 23:02:23,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-17 23:02:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-04-17 23:02:23,248 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-04-17 23:02:23,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:23,248 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-04-17 23:02:23,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-04-17 23:02:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:23,249 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:23,249 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:23,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:23,452 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:23,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:23,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-04-17 23:02:23,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:23,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44097964] [2020-04-17 23:02:23,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:23,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44097964] [2020-04-17 23:02:23,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739123874] [2020-04-17 23:02:23,542 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 23:02:23,588 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:02:23,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:23,589 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:23,590 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:23,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:23,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 23:02:23,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266074436] [2020-04-17 23:02:23,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:23,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:23,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:23,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:23,606 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-04-17 23:02:23,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:23,757 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-04-17 23:02:23,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:23,759 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 23:02:23,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:23,759 INFO L225 Difference]: With dead ends: 74 [2020-04-17 23:02:23,759 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 23:02:23,760 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 23:02:23,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 23:02:23,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-04-17 23:02:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 23:02:23,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 23:02:23,762 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-04-17 23:02:23,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:23,763 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 23:02:23,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:23,763 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 23:02:23,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:23,763 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:23,763 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:23,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:23,967 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:23,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:23,968 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-04-17 23:02:23,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:23,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733136980] [2020-04-17 23:02:23,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:24,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:24,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733136980] [2020-04-17 23:02:24,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651572418] [2020-04-17 23:02:24,048 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 23:02:24,092 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:24,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:24,092 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:24,093 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:24,108 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:24,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:24,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 23:02:24,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849539766] [2020-04-17 23:02:24,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:24,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:24,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:24,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:24,119 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-04-17 23:02:24,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:24,318 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-04-17 23:02:24,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:02:24,319 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 23:02:24,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:24,320 INFO L225 Difference]: With dead ends: 71 [2020-04-17 23:02:24,320 INFO L226 Difference]: Without dead ends: 65 [2020-04-17 23:02:24,320 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:02:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-04-17 23:02:24,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-04-17 23:02:24,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 23:02:24,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 23:02:24,323 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-04-17 23:02:24,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:24,324 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 23:02:24,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:24,324 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 23:02:24,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:24,324 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:24,324 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:24,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:24,525 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:24,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-04-17 23:02:24,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:24,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560200273] [2020-04-17 23:02:24,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:24,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560200273] [2020-04-17 23:02:24,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827160993] [2020-04-17 23:02:24,606 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 23:02:24,662 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-04-17 23:02:24,662 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:24,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:24,664 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:24,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:24,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 23:02:24,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403352744] [2020-04-17 23:02:24,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:24,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:24,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:24,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:24,681 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-04-17 23:02:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:24,872 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-04-17 23:02:24,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:02:24,873 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 23:02:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:24,874 INFO L225 Difference]: With dead ends: 68 [2020-04-17 23:02:24,874 INFO L226 Difference]: Without dead ends: 62 [2020-04-17 23:02:24,875 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:02:24,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-17 23:02:24,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-04-17 23:02:24,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 23:02:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 23:02:24,879 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-04-17 23:02:24,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:24,879 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 23:02:24,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:24,879 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 23:02:24,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:24,880 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:24,880 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:25,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:25,083 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:25,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:25,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-04-17 23:02:25,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:25,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237834315] [2020-04-17 23:02:25,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:25,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237834315] [2020-04-17 23:02:25,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923290273] [2020-04-17 23:02:25,157 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 23:02:25,204 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-04-17 23:02:25,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:25,205 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:25,206 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:25,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:25,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:25,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 23:02:25,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670338324] [2020-04-17 23:02:25,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:25,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:25,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:25,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:25,237 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-04-17 23:02:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:25,486 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-04-17 23:02:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:25,487 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 23:02:25,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:25,488 INFO L225 Difference]: With dead ends: 67 [2020-04-17 23:02:25,488 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 23:02:25,488 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 23:02:25,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 23:02:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-04-17 23:02:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 23:02:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 23:02:25,491 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-04-17 23:02:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:25,491 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 23:02:25,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 23:02:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:25,492 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:25,492 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:25,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:25,695 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:25,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:25,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-04-17 23:02:25,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:25,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802170515] [2020-04-17 23:02:25,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:25,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802170515] [2020-04-17 23:02:25,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101021054] [2020-04-17 23:02:25,774 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 23:02:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:25,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:25,830 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:25,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:25,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-04-17 23:02:25,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393560618] [2020-04-17 23:02:25,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 23:02:25,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:25,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 23:02:25,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-04-17 23:02:25,843 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-04-17 23:02:26,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:26,044 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-04-17 23:02:26,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:26,044 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-04-17 23:02:26,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:26,045 INFO L225 Difference]: With dead ends: 83 [2020-04-17 23:02:26,045 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 23:02:26,045 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 23:02:26,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 23:02:26,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-04-17 23:02:26,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 23:02:26,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-04-17 23:02:26,048 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-04-17 23:02:26,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:26,048 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-04-17 23:02:26,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 23:02:26,049 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-04-17 23:02:26,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:26,049 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:26,049 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:26,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:26,252 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:26,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:26,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-04-17 23:02:26,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:26,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890025056] [2020-04-17 23:02:26,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:26,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890025056] [2020-04-17 23:02:26,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789330023] [2020-04-17 23:02:26,321 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 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 23:02:26,378 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:26,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:26,379 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:26,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:26,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:26,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 23:02:26,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027891918] [2020-04-17 23:02:26,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:26,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:26,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:26,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:26,416 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-04-17 23:02:26,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:26,678 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-04-17 23:02:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:26,678 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 23:02:26,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:26,679 INFO L225 Difference]: With dead ends: 62 [2020-04-17 23:02:26,679 INFO L226 Difference]: Without dead ends: 54 [2020-04-17 23:02:26,680 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 23:02:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-04-17 23:02:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-04-17 23:02:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-04-17 23:02:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-04-17 23:02:26,682 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-04-17 23:02:26,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:26,683 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-04-17 23:02:26,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:26,683 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-04-17 23:02:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-04-17 23:02:26,683 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:26,684 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:26,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:26,888 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:26,888 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-04-17 23:02:26,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:26,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400656404] [2020-04-17 23:02:26,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:26,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400656404] [2020-04-17 23:02:26,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149839310] [2020-04-17 23:02:26,951 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 23:02:27,008 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-17 23:02:27,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:27,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 23:02:27,009 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:27,029 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:27,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:27,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-04-17 23:02:27,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587131253] [2020-04-17 23:02:27,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:27,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:27,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:27,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:27,046 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-04-17 23:02:27,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:27,328 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-04-17 23:02:27,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:27,328 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-04-17 23:02:27,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:27,329 INFO L225 Difference]: With dead ends: 68 [2020-04-17 23:02:27,329 INFO L226 Difference]: Without dead ends: 63 [2020-04-17 23:02:27,330 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 23:02:27,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-04-17 23:02:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-04-17 23:02:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 23:02:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-04-17 23:02:27,332 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-04-17 23:02:27,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:27,332 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-04-17 23:02:27,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:27,333 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-04-17 23:02:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:27,333 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:27,333 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:27,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:27,537 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:27,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:27,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-04-17 23:02:27,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:27,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889160427] [2020-04-17 23:02:27,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:27,626 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 23:02:27,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889160427] [2020-04-17 23:02:27,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826513288] [2020-04-17 23:02:27,626 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 23:02:27,687 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:27,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:27,688 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:27,690 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:27,724 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:27,734 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 23:02:27,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:27,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 23:02:27,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462086611] [2020-04-17 23:02:27,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:27,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:27,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:27,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:27,736 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-04-17 23:02:28,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:28,030 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-04-17 23:02:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:28,030 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 23:02:28,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:28,031 INFO L225 Difference]: With dead ends: 60 [2020-04-17 23:02:28,031 INFO L226 Difference]: Without dead ends: 55 [2020-04-17 23:02:28,032 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:02:28,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-04-17 23:02:28,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-04-17 23:02:28,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-04-17 23:02:28,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-04-17 23:02:28,035 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-04-17 23:02:28,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:28,036 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-04-17 23:02:28,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-04-17 23:02:28,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:28,036 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:28,036 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:28,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:28,240 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:28,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:28,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-04-17 23:02:28,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:28,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903297447] [2020-04-17 23:02:28,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:28,344 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 23:02:28,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903297447] [2020-04-17 23:02:28,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738916356] [2020-04-17 23:02:28,344 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 23:02:28,390 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 23:02:28,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:28,391 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:28,392 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:28,403 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 23:02:28,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:28,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 23:02:28,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113923869] [2020-04-17 23:02:28,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:28,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:28,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:28,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:28,405 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-04-17 23:02:28,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:28,546 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-04-17 23:02:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-04-17 23:02:28,546 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 23:02:28,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:28,547 INFO L225 Difference]: With dead ends: 66 [2020-04-17 23:02:28,547 INFO L226 Difference]: Without dead ends: 60 [2020-04-17 23:02:28,548 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 23:02:28,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-04-17 23:02:28,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-04-17 23:02:28,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 23:02:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-04-17 23:02:28,551 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-04-17 23:02:28,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:28,552 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-04-17 23:02:28,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:28,552 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-04-17 23:02:28,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:28,552 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:28,552 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:28,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:28,756 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:28,757 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-04-17 23:02:28,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:28,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126921285] [2020-04-17 23:02:28,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:28,936 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 23:02:28,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126921285] [2020-04-17 23:02:28,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041760846] [2020-04-17 23:02:28,938 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:02:29,010 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 23:02:29,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:29,012 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:29,013 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:29,033 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:29,043 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 23:02:29,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:29,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 23:02:29,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356083757] [2020-04-17 23:02:29,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:29,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:29,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:29,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:29,045 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-04-17 23:02:29,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:29,385 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-04-17 23:02:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-17 23:02:29,385 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 23:02:29,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:29,386 INFO L225 Difference]: With dead ends: 74 [2020-04-17 23:02:29,386 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 23:02:29,387 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:02:29,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 23:02:29,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-04-17 23:02:29,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-04-17 23:02:29,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-04-17 23:02:29,390 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-04-17 23:02:29,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:29,391 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-04-17 23:02:29,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:29,391 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-04-17 23:02:29,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:29,392 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:29,392 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:29,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:29,596 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:29,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:29,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-04-17 23:02:29,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:29,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923538171] [2020-04-17 23:02:29,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:29,684 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 23:02:29,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923538171] [2020-04-17 23:02:29,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326342970] [2020-04-17 23:02:29,684 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 23:02:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:29,729 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:29,730 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:29,740 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 23:02:29,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:29,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 23:02:29,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240955148] [2020-04-17 23:02:29,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:29,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:29,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:29,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:29,744 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-04-17 23:02:29,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:29,950 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-04-17 23:02:29,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:29,950 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 23:02:29,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:29,951 INFO L225 Difference]: With dead ends: 75 [2020-04-17 23:02:29,951 INFO L226 Difference]: Without dead ends: 69 [2020-04-17 23:02:29,952 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:02:29,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-17 23:02:29,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-04-17 23:02:29,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-04-17 23:02:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-04-17 23:02:29,955 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-04-17 23:02:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:29,955 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-04-17 23:02:29,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-04-17 23:02:29,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:29,956 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:29,956 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:30,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:30,156 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:30,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:30,157 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-04-17 23:02:30,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:30,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112536680] [2020-04-17 23:02:30,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:30,247 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 23:02:30,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112536680] [2020-04-17 23:02:30,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109733810] [2020-04-17 23:02:30,248 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 23:02:30,296 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:30,296 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:30,297 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:30,298 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:30,322 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:30,336 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 23:02:30,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:30,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 23:02:30,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711218976] [2020-04-17 23:02:30,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:30,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:30,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:30,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:30,339 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-04-17 23:02:30,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:30,681 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-04-17 23:02:30,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:30,682 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 23:02:30,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:30,683 INFO L225 Difference]: With dead ends: 79 [2020-04-17 23:02:30,684 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 23:02:30,684 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:02:30,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 23:02:30,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-04-17 23:02:30,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 23:02:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-04-17 23:02:30,688 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-04-17 23:02:30,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:30,689 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-04-17 23:02:30,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-04-17 23:02:30,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:30,690 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:30,690 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:30,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:30,895 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:30,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:30,896 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-04-17 23:02:30,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:30,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821330941] [2020-04-17 23:02:30,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:30,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:31,028 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 23:02:31,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821330941] [2020-04-17 23:02:31,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187140259] [2020-04-17 23:02:31,029 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 23:02:31,111 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 23:02:31,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:31,112 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:31,118 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:31,138 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 23:02:31,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:31,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 23:02:31,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270985419] [2020-04-17 23:02:31,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:31,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:31,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:31,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:31,145 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-04-17 23:02:31,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:31,482 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-04-17 23:02:31,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:02:31,483 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 23:02:31,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:31,484 INFO L225 Difference]: With dead ends: 79 [2020-04-17 23:02:31,484 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 23:02:31,484 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 23:02:31,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 23:02:31,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-04-17 23:02:31,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-17 23:02:31,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-04-17 23:02:31,487 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-04-17 23:02:31,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:31,488 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-04-17 23:02:31,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:31,488 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-04-17 23:02:31,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:31,489 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:31,489 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:31,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:31,690 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:31,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:31,690 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-04-17 23:02:31,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:31,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926019082] [2020-04-17 23:02:31,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:31,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926019082] [2020-04-17 23:02:31,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458501256] [2020-04-17 23:02:31,768 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 23:02:31,817 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:31,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:31,818 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:31,818 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:31,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:31,843 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 23:02:31,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:31,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 23:02:31,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644693967] [2020-04-17 23:02:31,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:31,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:31,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:31,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:31,845 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-04-17 23:02:32,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:32,205 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-04-17 23:02:32,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:32,206 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 23:02:32,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:32,206 INFO L225 Difference]: With dead ends: 76 [2020-04-17 23:02:32,207 INFO L226 Difference]: Without dead ends: 70 [2020-04-17 23:02:32,207 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:02:32,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-04-17 23:02:32,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-04-17 23:02:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 23:02:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-04-17 23:02:32,210 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-04-17 23:02:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:32,210 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-04-17 23:02:32,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:32,211 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-04-17 23:02:32,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:32,211 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:32,211 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:32,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:32,412 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:32,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:32,412 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-04-17 23:02:32,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:32,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102817180] [2020-04-17 23:02:32,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:32,471 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 23:02:32,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102817180] [2020-04-17 23:02:32,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921765493] [2020-04-17 23:02:32,472 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 23:02:32,521 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 23:02:32,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:32,522 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:32,523 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:32,540 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 23:02:32,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:32,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-04-17 23:02:32,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194418593] [2020-04-17 23:02:32,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-17 23:02:32,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:32,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-17 23:02:32,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-04-17 23:02:32,542 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-04-17 23:02:32,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:32,826 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-04-17 23:02:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:32,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-04-17 23:02:32,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:32,828 INFO L225 Difference]: With dead ends: 96 [2020-04-17 23:02:32,828 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 23:02:32,829 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 23:02:32,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 23:02:32,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-04-17 23:02:32,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 23:02:32,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-04-17 23:02:32,832 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-04-17 23:02:32,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:32,833 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-04-17 23:02:32,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-17 23:02:32,833 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-04-17 23:02:32,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-04-17 23:02:32,833 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:32,833 INFO L425 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:33,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:33,037 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:33,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:33,038 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-04-17 23:02:33,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:33,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958737917] [2020-04-17 23:02:33,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:33,105 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 23:02:33,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958737917] [2020-04-17 23:02:33,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861620323] [2020-04-17 23:02:33,105 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 23:02:33,171 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 23:02:33,171 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:33,172 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-04-17 23:02:33,174 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:33,202 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:33,216 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 23:02:33,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:33,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-04-17 23:02:33,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470707847] [2020-04-17 23:02:33,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:33,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:33,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:33,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:33,219 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-04-17 23:02:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:33,655 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-04-17 23:02:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:33,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-04-17 23:02:33,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:33,657 INFO L225 Difference]: With dead ends: 77 [2020-04-17 23:02:33,657 INFO L226 Difference]: Without dead ends: 69 [2020-04-17 23:02:33,658 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:02:33,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-04-17 23:02:33,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-04-17 23:02:33,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 23:02:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-04-17 23:02:33,660 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-04-17 23:02:33,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:33,661 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-04-17 23:02:33,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:33,661 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-04-17 23:02:33,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:33,661 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:33,662 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:33,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:33,865 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:33,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:33,866 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-04-17 23:02:33,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:33,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950402052] [2020-04-17 23:02:33,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:33,967 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 23:02:33,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950402052] [2020-04-17 23:02:33,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968856115] [2020-04-17 23:02:33,967 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 23:02:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:34,011 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:34,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:34,019 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 23:02:34,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:34,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 23:02:34,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746353053] [2020-04-17 23:02:34,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:34,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:34,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:34,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:34,021 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-04-17 23:02:34,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:34,347 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-04-17 23:02:34,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:02:34,348 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 23:02:34,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:34,349 INFO L225 Difference]: With dead ends: 84 [2020-04-17 23:02:34,349 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 23:02:34,349 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:02:34,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 23:02:34,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-04-17 23:02:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 23:02:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 23:02:34,353 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 23:02:34,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:34,353 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 23:02:34,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:34,353 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 23:02:34,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:34,354 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:34,354 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:34,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:34,557 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:34,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:34,558 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-04-17 23:02:34,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:34,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22648513] [2020-04-17 23:02:34,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:34,661 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 23:02:34,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22648513] [2020-04-17 23:02:34,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525641935] [2020-04-17 23:02:34,662 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 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 23:02:34,714 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:34,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:34,715 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:34,716 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:34,732 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:34,739 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 23:02:34,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:34,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 23:02:34,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254035589] [2020-04-17 23:02:34,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:34,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:34,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:34,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:34,741 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 23:02:34,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:34,994 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-04-17 23:02:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:34,994 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 23:02:34,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:34,994 INFO L225 Difference]: With dead ends: 81 [2020-04-17 23:02:34,995 INFO L226 Difference]: Without dead ends: 75 [2020-04-17 23:02:34,995 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:02:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-04-17 23:02:34,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-04-17 23:02:34,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 23:02:34,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 23:02:34,998 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 23:02:34,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:34,998 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 23:02:34,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:34,998 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 23:02:34,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:34,998 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:34,999 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:35,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:35,202 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:35,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:35,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-04-17 23:02:35,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:35,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530438199] [2020-04-17 23:02:35,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:35,302 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 23:02:35,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530438199] [2020-04-17 23:02:35,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044189995] [2020-04-17 23:02:35,302 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 23:02:35,345 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 23:02:35,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:35,346 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:35,346 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:35,366 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 23:02:35,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:35,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 23:02:35,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501926554] [2020-04-17 23:02:35,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:35,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:35,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:35,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:35,368 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 23:02:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:35,573 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-04-17 23:02:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:35,573 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 23:02:35,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:35,574 INFO L225 Difference]: With dead ends: 78 [2020-04-17 23:02:35,574 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 23:02:35,575 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 23:02:35,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 23:02:35,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-04-17 23:02:35,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 23:02:35,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 23:02:35,577 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 23:02:35,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:35,578 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 23:02:35,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:35,578 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 23:02:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:35,578 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:35,578 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:35,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:35,783 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:35,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:35,783 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-04-17 23:02:35,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:35,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770875598] [2020-04-17 23:02:35,784 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:35,871 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 23:02:35,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770875598] [2020-04-17 23:02:35,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804072659] [2020-04-17 23:02:35,872 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 23:02:35,915 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:35,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:35,916 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:35,916 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:35,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:35,942 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 23:02:35,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:35,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 23:02:35,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799290350] [2020-04-17 23:02:35,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:35,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:35,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:35,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:35,944 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 23:02:36,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:36,250 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-04-17 23:02:36,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:36,250 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 23:02:36,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:36,251 INFO L225 Difference]: With dead ends: 77 [2020-04-17 23:02:36,251 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 23:02:36,251 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-04-17 23:02:36,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 23:02:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-04-17 23:02:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 23:02:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 23:02:36,254 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 23:02:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:36,254 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 23:02:36,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 23:02:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:36,255 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:36,255 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:36,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:36,459 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:36,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:36,459 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-04-17 23:02:36,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:36,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610651318] [2020-04-17 23:02:36,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:36,549 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 23:02:36,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610651318] [2020-04-17 23:02:36,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758372370] [2020-04-17 23:02:36,549 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 23:02:36,605 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-04-17 23:02:36,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:36,606 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:36,607 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:36,620 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 23:02:36,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:36,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 23:02:36,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434041899] [2020-04-17 23:02:36,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:36,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:36,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:36,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:36,630 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 23:02:36,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:36,906 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-04-17 23:02:36,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:02:36,906 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 23:02:36,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:36,907 INFO L225 Difference]: With dead ends: 74 [2020-04-17 23:02:36,907 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 23:02:36,908 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 23:02:36,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 23:02:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-04-17 23:02:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 23:02:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 23:02:36,911 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-04-17 23:02:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:36,912 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 23:02:36,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:36,912 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 23:02:36,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:36,913 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:36,913 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:37,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:37,117 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:37,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:37,117 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-04-17 23:02:37,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:37,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866561031] [2020-04-17 23:02:37,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:37,211 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 23:02:37,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866561031] [2020-04-17 23:02:37,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265571587] [2020-04-17 23:02:37,212 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 23:02:37,269 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-04-17 23:02:37,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:37,271 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:37,271 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:37,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:37,300 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 23:02:37,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:37,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 23:02:37,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025852043] [2020-04-17 23:02:37,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:37,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:37,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:37,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:37,301 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-04-17 23:02:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:37,686 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-04-17 23:02:37,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:37,688 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 23:02:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:37,689 INFO L225 Difference]: With dead ends: 73 [2020-04-17 23:02:37,689 INFO L226 Difference]: Without dead ends: 67 [2020-04-17 23:02:37,690 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 23:02:37,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-04-17 23:02:37,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-04-17 23:02:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 23:02:37,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 23:02:37,692 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-04-17 23:02:37,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:37,692 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 23:02:37,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:37,692 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 23:02:37,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:37,692 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:37,693 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:37,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:37,893 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:37,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:37,894 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-04-17 23:02:37,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:37,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196687408] [2020-04-17 23:02:37,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:37,983 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 23:02:37,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196687408] [2020-04-17 23:02:37,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738766856] [2020-04-17 23:02:37,984 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:02:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:38,035 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:38,035 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:38,044 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 23:02:38,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:38,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-04-17 23:02:38,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410385379] [2020-04-17 23:02:38,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 23:02:38,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:38,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 23:02:38,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-04-17 23:02:38,048 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-04-17 23:02:38,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:38,325 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-04-17 23:02:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:38,326 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-04-17 23:02:38,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:38,327 INFO L225 Difference]: With dead ends: 89 [2020-04-17 23:02:38,327 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 23:02:38,327 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 23:02:38,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 23:02:38,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-04-17 23:02:38,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 23:02:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-04-17 23:02:38,331 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-04-17 23:02:38,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:38,331 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-04-17 23:02:38,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 23:02:38,331 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-04-17 23:02:38,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:38,331 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:38,332 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:38,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:38,535 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:38,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:38,536 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-04-17 23:02:38,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:38,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987025960] [2020-04-17 23:02:38,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:38,620 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 23:02:38,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987025960] [2020-04-17 23:02:38,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378692519] [2020-04-17 23:02:38,620 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 23:02:38,670 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:38,671 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:38,672 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:38,672 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:38,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:38,703 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 23:02:38,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:38,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 23:02:38,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159235146] [2020-04-17 23:02:38,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:38,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:38,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:38,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:38,705 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-04-17 23:02:39,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:39,131 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-04-17 23:02:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:02:39,132 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 23:02:39,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:39,133 INFO L225 Difference]: With dead ends: 70 [2020-04-17 23:02:39,133 INFO L226 Difference]: Without dead ends: 62 [2020-04-17 23:02:39,134 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 23:02:39,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-04-17 23:02:39,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-04-17 23:02:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-04-17 23:02:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-04-17 23:02:39,137 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-04-17 23:02:39,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:39,137 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-04-17 23:02:39,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-04-17 23:02:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-04-17 23:02:39,137 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:39,138 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:39,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:39,341 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:39,341 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-04-17 23:02:39,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:39,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609635415] [2020-04-17 23:02:39,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:39,490 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 23:02:39,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609635415] [2020-04-17 23:02:39,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046348271] [2020-04-17 23:02:39,490 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 23:02:39,535 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-04-17 23:02:39,536 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:39,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-17 23:02:39,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:39,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:39,561 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 23:02:39,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:39,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-04-17 23:02:39,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276754867] [2020-04-17 23:02:39,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:39,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:39,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:39,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:39,563 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-04-17 23:02:39,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:39,963 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-04-17 23:02:39,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:39,963 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-04-17 23:02:39,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:39,964 INFO L225 Difference]: With dead ends: 76 [2020-04-17 23:02:39,964 INFO L226 Difference]: Without dead ends: 71 [2020-04-17 23:02:39,964 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-04-17 23:02:39,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-04-17 23:02:39,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-04-17 23:02:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 23:02:39,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-04-17 23:02:39,967 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-04-17 23:02:39,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:39,967 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-04-17 23:02:39,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:39,967 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-04-17 23:02:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:39,968 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:39,968 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:40,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:40,169 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:40,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-04-17 23:02:40,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:40,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850788908] [2020-04-17 23:02:40,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:40,272 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 23:02:40,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850788908] [2020-04-17 23:02:40,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005410624] [2020-04-17 23:02:40,273 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 23:02:40,322 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:40,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:40,323 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:40,324 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:40,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:40,352 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 23:02:40,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:40,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:40,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206385495] [2020-04-17 23:02:40,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:40,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:40,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:40,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:40,354 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-04-17 23:02:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:40,736 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-04-17 23:02:40,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:40,737 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:40,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:40,738 INFO L225 Difference]: With dead ends: 66 [2020-04-17 23:02:40,738 INFO L226 Difference]: Without dead ends: 61 [2020-04-17 23:02:40,738 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 23:02:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-04-17 23:02:40,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-04-17 23:02:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-04-17 23:02:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-04-17 23:02:40,741 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-04-17 23:02:40,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:40,741 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-04-17 23:02:40,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:40,741 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-04-17 23:02:40,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:40,742 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:40,742 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:40,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:40,945 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:40,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:40,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-04-17 23:02:40,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:40,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193844160] [2020-04-17 23:02:40,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:41,063 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 23:02:41,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193844160] [2020-04-17 23:02:41,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475402038] [2020-04-17 23:02:41,064 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 23:02:41,111 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 23:02:41,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:41,112 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:41,113 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:41,136 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 23:02:41,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:41,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 23:02:41,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201712256] [2020-04-17 23:02:41,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:41,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:41,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:41,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:41,137 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-04-17 23:02:41,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:41,304 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-04-17 23:02:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-04-17 23:02:41,305 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 23:02:41,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:41,306 INFO L225 Difference]: With dead ends: 72 [2020-04-17 23:02:41,306 INFO L226 Difference]: Without dead ends: 66 [2020-04-17 23:02:41,307 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:02:41,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-04-17 23:02:41,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-04-17 23:02:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 23:02:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-04-17 23:02:41,311 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-04-17 23:02:41,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:41,311 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-04-17 23:02:41,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-04-17 23:02:41,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:41,312 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:41,312 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:41,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:41,515 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:41,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:41,516 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-04-17 23:02:41,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:41,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318188158] [2020-04-17 23:02:41,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:41,632 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 23:02:41,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318188158] [2020-04-17 23:02:41,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358106410] [2020-04-17 23:02:41,633 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 23:02:41,679 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 23:02:41,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:41,680 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:41,681 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:41,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:41,706 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 23:02:41,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:41,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:41,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513052705] [2020-04-17 23:02:41,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:41,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:41,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:41,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:41,708 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-04-17 23:02:41,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:41,927 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-04-17 23:02:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-04-17 23:02:41,928 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:41,929 INFO L225 Difference]: With dead ends: 82 [2020-04-17 23:02:41,929 INFO L226 Difference]: Without dead ends: 76 [2020-04-17 23:02:41,930 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:02:41,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-04-17 23:02:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-04-17 23:02:41,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-04-17 23:02:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-04-17 23:02:41,932 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-04-17 23:02:41,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:41,932 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-04-17 23:02:41,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:41,933 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-04-17 23:02:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:41,933 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:41,933 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:42,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:42,138 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:42,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:42,139 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-04-17 23:02:42,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:42,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762467843] [2020-04-17 23:02:42,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:42,277 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 23:02:42,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762467843] [2020-04-17 23:02:42,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685063069] [2020-04-17 23:02:42,278 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 23:02:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:42,355 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:42,356 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:42,379 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 23:02:42,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:42,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 23:02:42,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740567613] [2020-04-17 23:02:42,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:42,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:42,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:42,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:42,381 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-04-17 23:02:42,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:42,688 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-04-17 23:02:42,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:02:42,689 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 23:02:42,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:42,690 INFO L225 Difference]: With dead ends: 83 [2020-04-17 23:02:42,690 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 23:02:42,691 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-04-17 23:02:42,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 23:02:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-04-17 23:02:42,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-04-17 23:02:42,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-04-17 23:02:42,693 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-04-17 23:02:42,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:42,694 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-04-17 23:02:42,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-04-17 23:02:42,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:42,694 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:42,694 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:42,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:42,898 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:42,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:42,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-04-17 23:02:42,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:42,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092340295] [2020-04-17 23:02:42,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:43,012 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 23:02:43,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092340295] [2020-04-17 23:02:43,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949242391] [2020-04-17 23:02:43,013 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 23:02:43,087 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:43,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:43,088 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:43,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:43,131 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:43,141 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 23:02:43,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:43,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:43,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776936938] [2020-04-17 23:02:43,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:43,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:43,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:43,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:43,145 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-04-17 23:02:43,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:43,489 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-04-17 23:02:43,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:43,491 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:43,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:43,492 INFO L225 Difference]: With dead ends: 89 [2020-04-17 23:02:43,492 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 23:02:43,493 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-04-17 23:02:43,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 23:02:43,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-04-17 23:02:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 23:02:43,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-04-17 23:02:43,498 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-04-17 23:02:43,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:43,498 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-04-17 23:02:43,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:43,499 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-04-17 23:02:43,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:43,499 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:43,499 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:43,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:43,703 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:43,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:43,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-04-17 23:02:43,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:43,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33789783] [2020-04-17 23:02:43,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:43,787 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 23:02:43,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33789783] [2020-04-17 23:02:43,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437595387] [2020-04-17 23:02:43,788 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 23:02:43,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 23:02:43,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:43,837 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:43,838 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:43,845 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 23:02:43,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:43,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 23:02:43,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507711759] [2020-04-17 23:02:43,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:43,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:43,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:43,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:43,846 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-04-17 23:02:44,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:44,156 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-04-17 23:02:44,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:44,156 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 23:02:44,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:44,157 INFO L225 Difference]: With dead ends: 89 [2020-04-17 23:02:44,157 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 23:02:44,158 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 23:02:44,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 23:02:44,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-04-17 23:02:44,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 23:02:44,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-04-17 23:02:44,163 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-04-17 23:02:44,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:44,163 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-04-17 23:02:44,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:44,163 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-04-17 23:02:44,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:44,164 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:44,164 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:44,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:44,367 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:44,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:44,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-04-17 23:02:44,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:44,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760636199] [2020-04-17 23:02:44,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:44,494 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 23:02:44,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760636199] [2020-04-17 23:02:44,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442208301] [2020-04-17 23:02:44,494 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 23:02:44,539 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:44,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:44,540 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:44,540 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:44,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:44,564 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 23:02:44,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:44,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:44,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804108077] [2020-04-17 23:02:44,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:44,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:44,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:44,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:44,566 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-04-17 23:02:44,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:44,943 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-04-17 23:02:44,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:44,944 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:44,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:44,945 INFO L225 Difference]: With dead ends: 86 [2020-04-17 23:02:44,945 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 23:02:44,946 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 23:02:44,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 23:02:44,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-04-17 23:02:44,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 23:02:44,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-04-17 23:02:44,949 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-04-17 23:02:44,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:44,949 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-04-17 23:02:44,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:44,949 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-04-17 23:02:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:44,950 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:44,950 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:45,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:45,154 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:45,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:45,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-04-17 23:02:45,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:45,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94077646] [2020-04-17 23:02:45,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:45,239 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 23:02:45,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94077646] [2020-04-17 23:02:45,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948740459] [2020-04-17 23:02:45,240 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 23:02:45,287 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 23:02:45,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:45,288 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:45,289 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:45,297 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 23:02:45,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:45,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 23:02:45,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751921060] [2020-04-17 23:02:45,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:45,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:45,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:45,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:45,298 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-04-17 23:02:45,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:45,605 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-04-17 23:02:45,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:02:45,606 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 23:02:45,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:45,607 INFO L225 Difference]: With dead ends: 87 [2020-04-17 23:02:45,607 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 23:02:45,607 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-04-17 23:02:45,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 23:02:45,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-04-17 23:02:45,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-04-17 23:02:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-04-17 23:02:45,611 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-04-17 23:02:45,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:45,611 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-04-17 23:02:45,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:45,611 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-04-17 23:02:45,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:45,612 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:45,612 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:45,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:45,815 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:45,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:45,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-04-17 23:02:45,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:45,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806540336] [2020-04-17 23:02:45,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:45,895 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 23:02:45,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806540336] [2020-04-17 23:02:45,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693603320] [2020-04-17 23:02:45,896 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 23:02:45,944 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 23:02:45,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:45,945 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:45,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:45,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:45,974 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 23:02:45,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:45,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:45,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848335650] [2020-04-17 23:02:45,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:45,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:45,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:45,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:45,975 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-04-17 23:02:46,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:46,370 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-04-17 23:02:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:02:46,370 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:46,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:46,371 INFO L225 Difference]: With dead ends: 84 [2020-04-17 23:02:46,371 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 23:02:46,372 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 23:02:46,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 23:02:46,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-04-17 23:02:46,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 23:02:46,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-04-17 23:02:46,375 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-04-17 23:02:46,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:46,376 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-04-17 23:02:46,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:46,376 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-04-17 23:02:46,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:46,376 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:46,376 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:46,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:46,577 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:46,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:46,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-04-17 23:02:46,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:46,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784329425] [2020-04-17 23:02:46,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:46,683 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 23:02:46,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784329425] [2020-04-17 23:02:46,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429186028] [2020-04-17 23:02:46,684 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 23:02:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:46,731 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:46,732 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:46,746 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 23:02:46,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:46,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-04-17 23:02:46,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845018129] [2020-04-17 23:02:46,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-04-17 23:02:46,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:46,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-04-17 23:02:46,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-04-17 23:02:46,748 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-04-17 23:02:47,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:47,251 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-04-17 23:02:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:02:47,251 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-04-17 23:02:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:47,253 INFO L225 Difference]: With dead ends: 104 [2020-04-17 23:02:47,253 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 23:02:47,254 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-04-17 23:02:47,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 23:02:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-04-17 23:02:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 23:02:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-04-17 23:02:47,258 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-04-17 23:02:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:47,258 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-04-17 23:02:47,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-04-17 23:02:47,258 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-04-17 23:02:47,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 23:02:47,259 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:47,259 INFO L425 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:47,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:47,463 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:47,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:47,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-04-17 23:02:47,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:47,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816264163] [2020-04-17 23:02:47,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:47,550 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 23:02:47,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816264163] [2020-04-17 23:02:47,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473303126] [2020-04-17 23:02:47,551 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 23:02:47,598 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:47,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:47,599 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-04-17 23:02:47,600 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:47,616 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:47,626 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 23:02:47,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:47,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-04-17 23:02:47,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29092779] [2020-04-17 23:02:47,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:47,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:47,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:47,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:47,627 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-04-17 23:02:48,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:48,052 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-04-17 23:02:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:02:48,053 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-04-17 23:02:48,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:48,054 INFO L225 Difference]: With dead ends: 85 [2020-04-17 23:02:48,054 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 23:02:48,054 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 23:02:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 23:02:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-04-17 23:02:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 23:02:48,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-04-17 23:02:48,056 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-04-17 23:02:48,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:48,056 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-04-17 23:02:48,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:48,057 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-04-17 23:02:48,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:48,057 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:48,057 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:48,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:48,261 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:48,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:48,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-04-17 23:02:48,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:48,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333275324] [2020-04-17 23:02:48,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:48,400 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 23:02:48,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333275324] [2020-04-17 23:02:48,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687526015] [2020-04-17 23:02:48,401 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 23:02:48,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 23:02:48,447 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:48,448 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:48,448 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:48,455 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 23:02:48,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:48,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 23:02:48,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895368073] [2020-04-17 23:02:48,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:48,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:48,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:48,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:48,458 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-04-17 23:02:48,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:48,696 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-04-17 23:02:48,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:48,696 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 23:02:48,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:48,697 INFO L225 Difference]: With dead ends: 94 [2020-04-17 23:02:48,698 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 23:02:48,698 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 23:02:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 23:02:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-04-17 23:02:48,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 23:02:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 23:02:48,701 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 23:02:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:48,702 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 23:02:48,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:48,702 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 23:02:48,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:48,702 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:48,703 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:48,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:48,906 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:48,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:48,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-04-17 23:02:48,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:48,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136596] [2020-04-17 23:02:48,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:48,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:49,024 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 23:02:49,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136596] [2020-04-17 23:02:49,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337366421] [2020-04-17 23:02:49,025 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 23:02:49,078 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:49,078 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:49,079 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:49,080 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:49,095 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 23:02:49,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:49,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:49,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164275300] [2020-04-17 23:02:49,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:49,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:49,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:49,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:49,103 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 23:02:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:49,379 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-04-17 23:02:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:49,379 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:49,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:49,380 INFO L225 Difference]: With dead ends: 91 [2020-04-17 23:02:49,381 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 23:02:49,381 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 23:02:49,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 23:02:49,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-04-17 23:02:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:02:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 23:02:49,383 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 23:02:49,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:49,383 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 23:02:49,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 23:02:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:49,387 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:49,387 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:49,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:49,588 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:49,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:49,588 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-04-17 23:02:49,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:49,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963483594] [2020-04-17 23:02:49,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:49,697 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 23:02:49,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963483594] [2020-04-17 23:02:49,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082440476] [2020-04-17 23:02:49,698 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 23:02:49,750 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 23:02:49,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:49,751 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:49,751 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:49,761 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 23:02:49,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:49,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 23:02:49,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984027177] [2020-04-17 23:02:49,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:49,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:49,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:49,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:49,762 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 23:02:50,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:50,021 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-04-17 23:02:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:02:50,022 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 23:02:50,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:50,023 INFO L225 Difference]: With dead ends: 88 [2020-04-17 23:02:50,023 INFO L226 Difference]: Without dead ends: 82 [2020-04-17 23:02:50,023 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 23:02:50,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-04-17 23:02:50,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-04-17 23:02:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 23:02:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 23:02:50,025 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 23:02:50,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:50,025 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 23:02:50,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 23:02:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:50,026 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:50,026 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:50,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:50,227 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:50,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:50,227 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-04-17 23:02:50,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:50,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722931035] [2020-04-17 23:02:50,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:50,351 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 23:02:50,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722931035] [2020-04-17 23:02:50,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706471892] [2020-04-17 23:02:50,352 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 23:02:50,406 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 23:02:50,407 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:50,407 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:50,408 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:50,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:50,433 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 23:02:50,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:50,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:50,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749082056] [2020-04-17 23:02:50,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:50,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:50,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:50,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:50,435 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 23:02:50,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:50,787 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-04-17 23:02:50,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:50,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:50,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:50,788 INFO L225 Difference]: With dead ends: 87 [2020-04-17 23:02:50,788 INFO L226 Difference]: Without dead ends: 81 [2020-04-17 23:02:50,789 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 23:02:50,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-04-17 23:02:50,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-04-17 23:02:50,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:02:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 23:02:50,792 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 23:02:50,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:50,792 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 23:02:50,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:50,792 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 23:02:50,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:50,793 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:50,793 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:50,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:50,995 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:50,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:50,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-04-17 23:02:50,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:50,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093641759] [2020-04-17 23:02:50,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:51,110 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 23:02:51,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093641759] [2020-04-17 23:02:51,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921669558] [2020-04-17 23:02:51,111 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 23:02:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:51,175 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:51,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:51,185 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 23:02:51,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:51,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 23:02:51,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984575224] [2020-04-17 23:02:51,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:51,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:51,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:51,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:51,188 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 23:02:51,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:51,471 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-04-17 23:02:51,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:51,472 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 23:02:51,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:51,473 INFO L225 Difference]: With dead ends: 84 [2020-04-17 23:02:51,473 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 23:02:51,474 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 23:02:51,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 23:02:51,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-04-17 23:02:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 23:02:51,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 23:02:51,477 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 23:02:51,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:51,477 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 23:02:51,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:51,478 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 23:02:51,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:51,478 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:51,478 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:51,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:51,683 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:51,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:51,684 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-04-17 23:02:51,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:51,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668533396] [2020-04-17 23:02:51,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:51,803 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 23:02:51,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668533396] [2020-04-17 23:02:51,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528187176] [2020-04-17 23:02:51,804 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 23:02:51,848 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:51,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:51,849 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:51,850 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:51,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:51,869 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 23:02:51,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:51,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:51,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181304756] [2020-04-17 23:02:51,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:51,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:51,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:51,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:51,871 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 23:02:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:52,275 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-04-17 23:02:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:02:52,276 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:52,277 INFO L225 Difference]: With dead ends: 83 [2020-04-17 23:02:52,277 INFO L226 Difference]: Without dead ends: 77 [2020-04-17 23:02:52,277 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 23:02:52,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-04-17 23:02:52,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-04-17 23:02:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:02:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 23:02:52,281 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 23:02:52,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:52,281 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 23:02:52,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:52,281 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 23:02:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:52,282 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:52,282 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:52,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:52,484 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:52,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:52,484 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-04-17 23:02:52,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:52,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384598561] [2020-04-17 23:02:52,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:52,571 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 23:02:52,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384598561] [2020-04-17 23:02:52,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491630236] [2020-04-17 23:02:52,572 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:02:52,622 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-17 23:02:52,622 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:52,623 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:52,624 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:52,649 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 23:02:52,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:52,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 23:02:52,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000589854] [2020-04-17 23:02:52,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:52,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:52,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:52,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:52,651 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 23:02:52,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:52,986 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-04-17 23:02:52,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:02:52,987 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 23:02:52,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:52,987 INFO L225 Difference]: With dead ends: 80 [2020-04-17 23:02:52,988 INFO L226 Difference]: Without dead ends: 74 [2020-04-17 23:02:52,988 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 23:02:52,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-04-17 23:02:52,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-04-17 23:02:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 23:02:52,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 23:02:52,991 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-04-17 23:02:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:52,991 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 23:02:52,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:52,991 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 23:02:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:52,992 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:52,992 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:53,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:53,192 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:53,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:53,193 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-04-17 23:02:53,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:53,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875134314] [2020-04-17 23:02:53,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:53,302 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 23:02:53,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875134314] [2020-04-17 23:02:53,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71018970] [2020-04-17 23:02:53,303 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 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 23:02:53,350 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:53,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:53,350 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:53,351 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:53,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:53,372 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 23:02:53,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:53,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:53,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666875316] [2020-04-17 23:02:53,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:53,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:53,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:53,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:53,375 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-04-17 23:02:53,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:53,834 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-04-17 23:02:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:02:53,834 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:53,836 INFO L225 Difference]: With dead ends: 79 [2020-04-17 23:02:53,836 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 23:02:53,836 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 23:02:53,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 23:02:53,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-04-17 23:02:53,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:02:53,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 23:02:53,839 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-04-17 23:02:53,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:53,839 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 23:02:53,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:53,839 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 23:02:53,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:53,839 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:53,839 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:54,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:54,040 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:54,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:54,041 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-04-17 23:02:54,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:54,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680720164] [2020-04-17 23:02:54,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:54,131 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 23:02:54,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680720164] [2020-04-17 23:02:54,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874123800] [2020-04-17 23:02:54,132 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 23:02:54,176 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-04-17 23:02:54,176 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:54,177 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:54,178 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:54,188 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 23:02:54,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:54,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-04-17 23:02:54,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838762077] [2020-04-17 23:02:54,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 23:02:54,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:54,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 23:02:54,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-04-17 23:02:54,190 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-04-17 23:02:54,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:54,550 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-04-17 23:02:54,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:02:54,551 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-04-17 23:02:54,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:54,552 INFO L225 Difference]: With dead ends: 95 [2020-04-17 23:02:54,552 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 23:02:54,552 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 23:02:54,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 23:02:54,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-04-17 23:02:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 23:02:54,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-04-17 23:02:54,556 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-04-17 23:02:54,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:54,556 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-04-17 23:02:54,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 23:02:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-04-17 23:02:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:54,556 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:54,556 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:54,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:54,757 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-04-17 23:02:54,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:54,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023694489] [2020-04-17 23:02:54,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:54,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:54,870 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 23:02:54,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023694489] [2020-04-17 23:02:54,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514726467] [2020-04-17 23:02:54,870 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 23:02:54,918 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-04-17 23:02:54,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:54,919 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:54,920 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:54,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:54,947 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 23:02:54,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:54,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:54,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392341344] [2020-04-17 23:02:54,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:54,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:54,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:54,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:54,949 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-04-17 23:02:55,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:55,458 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-04-17 23:02:55,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:02:55,458 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:55,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:55,459 INFO L225 Difference]: With dead ends: 76 [2020-04-17 23:02:55,459 INFO L226 Difference]: Without dead ends: 68 [2020-04-17 23:02:55,460 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 23:02:55,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-04-17 23:02:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-04-17 23:02:55,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-04-17 23:02:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-04-17 23:02:55,462 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-04-17 23:02:55,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:55,462 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-04-17 23:02:55,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-04-17 23:02:55,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-04-17 23:02:55,463 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:55,463 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:55,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:55,665 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:55,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-04-17 23:02:55,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:55,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240686554] [2020-04-17 23:02:55,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:55,747 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 23:02:55,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240686554] [2020-04-17 23:02:55,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194826963] [2020-04-17 23:02:55,748 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 23:02:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:55,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-17 23:02:55,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:55,809 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:55,823 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 23:02:55,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:55,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-04-17 23:02:55,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254343269] [2020-04-17 23:02:55,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:55,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:55,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:55,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:55,825 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-04-17 23:02:56,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:56,300 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-04-17 23:02:56,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:02:56,300 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-04-17 23:02:56,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:56,301 INFO L225 Difference]: With dead ends: 84 [2020-04-17 23:02:56,301 INFO L226 Difference]: Without dead ends: 79 [2020-04-17 23:02:56,302 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 23:02:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-17 23:02:56,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-04-17 23:02:56,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 23:02:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-04-17 23:02:56,304 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-04-17 23:02:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:56,304 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-04-17 23:02:56,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:56,305 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-04-17 23:02:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:56,305 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:56,305 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:56,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:56,507 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:56,507 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-04-17 23:02:56,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:56,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686011143] [2020-04-17 23:02:56,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:56,593 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 23:02:56,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686011143] [2020-04-17 23:02:56,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832268682] [2020-04-17 23:02:56,594 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 23:02:56,640 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:02:56,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:56,642 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:02:56,643 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:56,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:56,677 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 23:02:56,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:56,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 23:02:56,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404312724] [2020-04-17 23:02:56,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:02:56,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:56,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:02:56,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:02:56,678 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-04-17 23:02:57,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:57,168 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-04-17 23:02:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:02:57,169 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 23:02:57,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:57,170 INFO L225 Difference]: With dead ends: 72 [2020-04-17 23:02:57,170 INFO L226 Difference]: Without dead ends: 67 [2020-04-17 23:02:57,170 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 23:02:57,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-04-17 23:02:57,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-04-17 23:02:57,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-04-17 23:02:57,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-04-17 23:02:57,172 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-04-17 23:02:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:57,173 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-04-17 23:02:57,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:02:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-04-17 23:02:57,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:57,174 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:57,174 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:57,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:57,375 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:57,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:57,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-04-17 23:02:57,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:57,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928490613] [2020-04-17 23:02:57,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:57,496 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 23:02:57,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928490613] [2020-04-17 23:02:57,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742752075] [2020-04-17 23:02:57,496 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 23:02:57,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 23:02:57,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:57,543 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:02:57,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:57,551 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 23:02:57,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:57,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 23:02:57,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939845953] [2020-04-17 23:02:57,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:57,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:57,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:57,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:57,552 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-04-17 23:02:57,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:57,773 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-04-17 23:02:57,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-04-17 23:02:57,773 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 23:02:57,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:57,774 INFO L225 Difference]: With dead ends: 78 [2020-04-17 23:02:57,775 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 23:02:57,775 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 23:02:57,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 23:02:57,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-04-17 23:02:57,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 23:02:57,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-04-17 23:02:57,777 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-04-17 23:02:57,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:57,777 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-04-17 23:02:57,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:57,777 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-04-17 23:02:57,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:57,778 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:57,778 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:57,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:57,980 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:57,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:57,981 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-04-17 23:02:57,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:57,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199196995] [2020-04-17 23:02:57,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:58,110 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 23:02:58,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199196995] [2020-04-17 23:02:58,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842554330] [2020-04-17 23:02:58,111 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 23:02:58,156 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:02:58,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:58,157 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:02:58,158 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:58,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:58,175 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 23:02:58,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:58,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 23:02:58,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867178549] [2020-04-17 23:02:58,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:02:58,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:58,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:02:58,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:02:58,176 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-04-17 23:02:58,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:58,429 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-04-17 23:02:58,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-04-17 23:02:58,429 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 23:02:58,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:58,430 INFO L225 Difference]: With dead ends: 90 [2020-04-17 23:02:58,430 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 23:02:58,431 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-04-17 23:02:58,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 23:02:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-04-17 23:02:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-04-17 23:02:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-04-17 23:02:58,433 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-04-17 23:02:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:58,433 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-04-17 23:02:58,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:02:58,433 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-04-17 23:02:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:58,434 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:58,434 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:58,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:58,637 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:58,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:58,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-04-17 23:02:58,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:58,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457641714] [2020-04-17 23:02:58,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:58,754 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 23:02:58,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457641714] [2020-04-17 23:02:58,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716746109] [2020-04-17 23:02:58,755 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 23:02:58,806 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 23:02:58,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:58,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:02:58,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:58,814 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 23:02:58,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:58,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 23:02:58,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094375491] [2020-04-17 23:02:58,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:02:58,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:58,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:02:58,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:02:58,816 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-04-17 23:02:59,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:59,092 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-04-17 23:02:59,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:02:59,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 23:02:59,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:59,093 INFO L225 Difference]: With dead ends: 91 [2020-04-17 23:02:59,093 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 23:02:59,094 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 23:02:59,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 23:02:59,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-04-17 23:02:59,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-04-17 23:02:59,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-04-17 23:02:59,097 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-04-17 23:02:59,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:59,097 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-04-17 23:02:59,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:02:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-04-17 23:02:59,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:59,097 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:59,097 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:02:59,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:02:59,301 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:02:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:02:59,301 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-04-17 23:02:59,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:02:59,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946268225] [2020-04-17 23:02:59,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:02:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:02:59,440 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 23:02:59,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946268225] [2020-04-17 23:02:59,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218574215] [2020-04-17 23:02:59,441 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 23:02:59,497 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 23:02:59,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:02:59,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:02:59,503 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:02:59,516 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:02:59,524 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 23:02:59,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:02:59,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 23:02:59,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677068298] [2020-04-17 23:02:59,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:02:59,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:02:59,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:02:59,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:02:59,525 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-04-17 23:02:59,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:02:59,854 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-04-17 23:02:59,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:02:59,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 23:02:59,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:02:59,855 INFO L225 Difference]: With dead ends: 99 [2020-04-17 23:02:59,855 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 23:02:59,856 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 23:02:59,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 23:02:59,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-04-17 23:02:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 23:02:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-04-17 23:02:59,858 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-04-17 23:02:59,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:02:59,858 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-04-17 23:02:59,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:02:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-04-17 23:02:59,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:02:59,859 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:02:59,859 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:00,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:00,060 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:00,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:00,060 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-04-17 23:03:00,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:00,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332173906] [2020-04-17 23:03:00,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:00,178 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 23:03:00,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332173906] [2020-04-17 23:03:00,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701983601] [2020-04-17 23:03:00,179 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 23:03:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:00,245 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:03:00,245 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:00,255 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 23:03:00,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:00,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 23:03:00,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854958911] [2020-04-17 23:03:00,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:03:00,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:00,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:03:00,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:03:00,258 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-04-17 23:03:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:00,579 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-04-17 23:03:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:03:00,580 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 23:03:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:00,581 INFO L225 Difference]: With dead ends: 99 [2020-04-17 23:03:00,581 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 23:03:00,581 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 23:03:00,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 23:03:00,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-04-17 23:03:00,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 23:03:00,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-04-17 23:03:00,584 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-04-17 23:03:00,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:00,585 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-04-17 23:03:00,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:03:00,585 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-04-17 23:03:00,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:03:00,585 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:00,585 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:00,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:00,789 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:00,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:00,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-04-17 23:03:00,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:00,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384404244] [2020-04-17 23:03:00,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:00,909 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 23:03:00,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384404244] [2020-04-17 23:03:00,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858090401] [2020-04-17 23:03:00,909 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 23:03:00,952 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:00,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:00,953 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:03:00,953 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:00,966 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:00,974 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 23:03:00,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:00,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 23:03:00,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297832473] [2020-04-17 23:03:00,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:00,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:00,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:00,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:00,975 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-04-17 23:03:01,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:01,367 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-04-17 23:03:01,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:03:01,368 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 23:03:01,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:01,369 INFO L225 Difference]: With dead ends: 96 [2020-04-17 23:03:01,369 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 23:03:01,369 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 23:03:01,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 23:03:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-04-17 23:03:01,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 23:03:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-04-17 23:03:01,372 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-04-17 23:03:01,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:01,372 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-04-17 23:03:01,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:01,372 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-04-17 23:03:01,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:03:01,373 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:01,373 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:01,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:01,574 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:01,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:01,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-04-17 23:03:01,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:01,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112424284] [2020-04-17 23:03:01,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:01,700 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 23:03:01,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112424284] [2020-04-17 23:03:01,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522560470] [2020-04-17 23:03:01,700 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 23:03:01,754 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 23:03:01,754 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:01,755 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:03:01,755 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:01,765 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 23:03:01,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:01,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 23:03:01,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115273451] [2020-04-17 23:03:01,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:03:01,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:01,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:03:01,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:03:01,767 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-04-17 23:03:02,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:02,112 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-04-17 23:03:02,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:03:02,113 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 23:03:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:02,114 INFO L225 Difference]: With dead ends: 97 [2020-04-17 23:03:02,114 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 23:03:02,114 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 23:03:02,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 23:03:02,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-04-17 23:03:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 23:03:02,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-04-17 23:03:02,120 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-04-17 23:03:02,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:02,120 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-04-17 23:03:02,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:03:02,120 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-04-17 23:03:02,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:03:02,121 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:02,121 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:02,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:02,325 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:02,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-04-17 23:03:02,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:02,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458006997] [2020-04-17 23:03:02,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:02,425 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 23:03:02,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458006997] [2020-04-17 23:03:02,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006669743] [2020-04-17 23:03:02,425 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 23:03:02,471 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:02,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:02,472 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:03:02,473 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:02,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:02,521 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 23:03:02,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:02,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 23:03:02,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464594427] [2020-04-17 23:03:02,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:02,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:02,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:02,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:02,522 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-04-17 23:03:03,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:03,117 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-04-17 23:03:03,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:03:03,117 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 23:03:03,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:03,119 INFO L225 Difference]: With dead ends: 94 [2020-04-17 23:03:03,119 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 23:03:03,119 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 23:03:03,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 23:03:03,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-04-17 23:03:03,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:03:03,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-04-17 23:03:03,123 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-04-17 23:03:03,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:03,123 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-04-17 23:03:03,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:03,124 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-04-17 23:03:03,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:03:03,124 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:03,124 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:03,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:03,328 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:03,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:03,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-04-17 23:03:03,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:03,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116868866] [2020-04-17 23:03:03,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:03,492 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 23:03:03,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116868866] [2020-04-17 23:03:03,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614801937] [2020-04-17 23:03:03,493 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 23:03:03,554 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 23:03:03,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:03,556 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:03:03,557 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:03,569 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 23:03:03,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:03,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 23:03:03,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609089657] [2020-04-17 23:03:03,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:03:03,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:03,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:03:03,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:03:03,571 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-04-17 23:03:03,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:03,971 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-04-17 23:03:03,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:03:03,971 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 23:03:03,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:03,972 INFO L225 Difference]: With dead ends: 95 [2020-04-17 23:03:03,972 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 23:03:03,973 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 23:03:03,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 23:03:03,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-04-17 23:03:03,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-17 23:03:03,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-04-17 23:03:03,978 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-04-17 23:03:03,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:03,978 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-04-17 23:03:03,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:03:03,978 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-04-17 23:03:03,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:03:03,979 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:03,979 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:04,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:04,183 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:04,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:04,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-04-17 23:03:04,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:04,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177714819] [2020-04-17 23:03:04,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:04,273 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 23:03:04,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177714819] [2020-04-17 23:03:04,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264391117] [2020-04-17 23:03:04,273 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:03:04,325 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 23:03:04,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:04,327 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:03:04,328 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:04,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:04,352 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 23:03:04,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:04,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 23:03:04,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111746569] [2020-04-17 23:03:04,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:04,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:04,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:04,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:04,353 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-04-17 23:03:04,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:04,864 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-04-17 23:03:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:03:04,865 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 23:03:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:04,866 INFO L225 Difference]: With dead ends: 92 [2020-04-17 23:03:04,866 INFO L226 Difference]: Without dead ends: 86 [2020-04-17 23:03:04,866 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 23:03:04,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-04-17 23:03:04,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-04-17 23:03:04,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 23:03:04,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-04-17 23:03:04,870 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-04-17 23:03:04,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:04,870 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-04-17 23:03:04,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:04,870 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-04-17 23:03:04,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:03:04,871 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:04,871 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:05,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:05,072 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:05,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:05,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-04-17 23:03:05,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:05,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774643369] [2020-04-17 23:03:05,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:05,160 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 23:03:05,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774643369] [2020-04-17 23:03:05,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390951710] [2020-04-17 23:03:05,161 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 23:03:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:05,208 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-04-17 23:03:05,208 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:05,219 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 23:03:05,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:05,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-04-17 23:03:05,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625484209] [2020-04-17 23:03:05,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-17 23:03:05,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:05,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-17 23:03:05,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-04-17 23:03:05,220 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-04-17 23:03:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:05,677 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-04-17 23:03:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:03:05,677 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-04-17 23:03:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:05,679 INFO L225 Difference]: With dead ends: 112 [2020-04-17 23:03:05,679 INFO L226 Difference]: Without dead ends: 106 [2020-04-17 23:03:05,679 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 23:03:05,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-04-17 23:03:05,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-04-17 23:03:05,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 23:03:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-04-17 23:03:05,682 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-04-17 23:03:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:05,682 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-04-17 23:03:05,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-17 23:03:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-04-17 23:03:05,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-04-17 23:03:05,683 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:05,683 INFO L425 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:05,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:05,885 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:05,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:05,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-04-17 23:03:05,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:05,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634291856] [2020-04-17 23:03:05,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:05,985 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 23:03:05,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634291856] [2020-04-17 23:03:05,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430546996] [2020-04-17 23:03:05,985 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 23:03:06,030 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:06,030 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:06,031 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:06,032 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:06,061 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 23:03:06,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:06,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-04-17 23:03:06,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110392383] [2020-04-17 23:03:06,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:06,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:06,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:06,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:06,063 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-04-17 23:03:06,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:06,611 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-04-17 23:03:06,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:03:06,611 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-04-17 23:03:06,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:06,612 INFO L225 Difference]: With dead ends: 93 [2020-04-17 23:03:06,612 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 23:03:06,613 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 23:03:06,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 23:03:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-04-17 23:03:06,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-17 23:03:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-04-17 23:03:06,615 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-04-17 23:03:06,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:06,615 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-04-17 23:03:06,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:06,615 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-04-17 23:03:06,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:06,616 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:06,616 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:06,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:06,817 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:06,817 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-04-17 23:03:06,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:06,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317142391] [2020-04-17 23:03:06,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:06,960 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 23:03:06,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317142391] [2020-04-17 23:03:06,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807569981] [2020-04-17 23:03:06,961 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 23:03:07,010 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 23:03:07,010 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:07,011 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:07,012 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:07,019 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 23:03:07,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:07,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 23:03:07,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758212506] [2020-04-17 23:03:07,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:07,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:07,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:07,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:07,021 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-04-17 23:03:07,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:07,288 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-04-17 23:03:07,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:03:07,289 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 23:03:07,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:07,290 INFO L225 Difference]: With dead ends: 104 [2020-04-17 23:03:07,290 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 23:03:07,290 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 23:03:07,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 23:03:07,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-04-17 23:03:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 23:03:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 23:03:07,293 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 23:03:07,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:07,293 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 23:03:07,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 23:03:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:07,294 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:07,294 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:07,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:07,498 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:07,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:07,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-04-17 23:03:07,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:07,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468906326] [2020-04-17 23:03:07,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:07,633 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 23:03:07,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468906326] [2020-04-17 23:03:07,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031497232] [2020-04-17 23:03:07,634 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 23:03:07,683 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:07,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:07,684 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:07,684 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:07,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:07,702 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 23:03:07,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:07,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 23:03:07,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086830183] [2020-04-17 23:03:07,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:07,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:07,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:07,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:07,704 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 23:03:08,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:08,046 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-04-17 23:03:08,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:03:08,047 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 23:03:08,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:08,048 INFO L225 Difference]: With dead ends: 101 [2020-04-17 23:03:08,048 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 23:03:08,048 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 23:03:08,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 23:03:08,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-04-17 23:03:08,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 23:03:08,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 23:03:08,051 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 23:03:08,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:08,051 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 23:03:08,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:08,051 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 23:03:08,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:08,051 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:08,051 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:08,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:08,252 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:08,253 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-04-17 23:03:08,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:08,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823853610] [2020-04-17 23:03:08,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:08,379 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 23:03:08,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823853610] [2020-04-17 23:03:08,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362357191] [2020-04-17 23:03:08,380 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 23:03:08,426 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 23:03:08,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:08,427 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:08,427 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:08,440 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 23:03:08,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:08,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 23:03:08,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140862130] [2020-04-17 23:03:08,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:08,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:08,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:08,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:08,441 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 23:03:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:08,750 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-04-17 23:03:08,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:03:08,750 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 23:03:08,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:08,751 INFO L225 Difference]: With dead ends: 98 [2020-04-17 23:03:08,752 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 23:03:08,752 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 23:03:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 23:03:08,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-04-17 23:03:08,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 23:03:08,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 23:03:08,755 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 23:03:08,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:08,755 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 23:03:08,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:08,756 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 23:03:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:08,756 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:08,756 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:08,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:08,960 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:08,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-04-17 23:03:08,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:08,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179451691] [2020-04-17 23:03:08,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:09,095 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 23:03:09,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179451691] [2020-04-17 23:03:09,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019911885] [2020-04-17 23:03:09,096 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 23:03:09,146 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 23:03:09,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:09,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:09,148 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:09,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:09,174 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 23:03:09,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:09,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 23:03:09,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130365790] [2020-04-17 23:03:09,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:09,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:09,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:09,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:09,176 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 23:03:09,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:09,578 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-04-17 23:03:09,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:03:09,579 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 23:03:09,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:09,580 INFO L225 Difference]: With dead ends: 97 [2020-04-17 23:03:09,580 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 23:03:09,580 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 23:03:09,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 23:03:09,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-04-17 23:03:09,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 23:03:09,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 23:03:09,583 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 23:03:09,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:09,584 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 23:03:09,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:09,584 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 23:03:09,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:09,584 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:09,584 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:09,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:09,788 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:09,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:09,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-04-17 23:03:09,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:09,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76485645] [2020-04-17 23:03:09,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:10,008 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 23:03:10,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76485645] [2020-04-17 23:03:10,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096455297] [2020-04-17 23:03:10,009 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 23:03:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:10,054 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:10,055 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:10,063 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 23:03:10,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:10,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 23:03:10,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201241919] [2020-04-17 23:03:10,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:10,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:10,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:10,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:10,065 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 23:03:10,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:10,410 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-04-17 23:03:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:03:10,410 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 23:03:10,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:10,411 INFO L225 Difference]: With dead ends: 94 [2020-04-17 23:03:10,411 INFO L226 Difference]: Without dead ends: 88 [2020-04-17 23:03:10,412 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-04-17 23:03:10,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-04-17 23:03:10,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-04-17 23:03:10,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 23:03:10,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 23:03:10,414 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 23:03:10,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:10,415 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 23:03:10,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 23:03:10,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:10,415 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:10,415 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:10,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:10,616 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:10,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:10,617 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-04-17 23:03:10,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:10,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577985906] [2020-04-17 23:03:10,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:10,752 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 23:03:10,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577985906] [2020-04-17 23:03:10,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237693375] [2020-04-17 23:03:10,753 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 23:03:10,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:10,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:10,805 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:10,805 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:10,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:10,826 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 23:03:10,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:10,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 23:03:10,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495486120] [2020-04-17 23:03:10,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:10,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:10,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:10,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:10,828 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 23:03:11,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:11,286 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-04-17 23:03:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:03:11,287 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 23:03:11,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:11,288 INFO L225 Difference]: With dead ends: 93 [2020-04-17 23:03:11,288 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 23:03:11,289 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 23:03:11,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 23:03:11,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-04-17 23:03:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 23:03:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 23:03:11,292 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 23:03:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:11,292 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 23:03:11,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 23:03:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:11,293 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:11,293 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:11,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:11,497 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:11,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:11,497 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-04-17 23:03:11,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:11,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719773472] [2020-04-17 23:03:11,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:11,610 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 23:03:11,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719773472] [2020-04-17 23:03:11,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483478948] [2020-04-17 23:03:11,611 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 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 23:03:11,664 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 23:03:11,664 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:11,665 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:11,665 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:11,675 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 23:03:11,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:11,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 23:03:11,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425390171] [2020-04-17 23:03:11,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:11,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:11,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:11,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:11,676 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 23:03:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:12,075 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-04-17 23:03:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:03:12,075 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 23:03:12,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:12,077 INFO L225 Difference]: With dead ends: 90 [2020-04-17 23:03:12,077 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 23:03:12,077 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 23:03:12,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 23:03:12,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-04-17 23:03:12,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 23:03:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 23:03:12,080 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 23:03:12,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:12,080 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 23:03:12,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:12,080 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 23:03:12,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:12,081 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:12,081 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:12,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:12,282 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:12,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:12,282 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-04-17 23:03:12,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:12,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559915668] [2020-04-17 23:03:12,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:12,398 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 23:03:12,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559915668] [2020-04-17 23:03:12,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134165323] [2020-04-17 23:03:12,399 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 23:03:12,444 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:12,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:12,445 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:12,447 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:12,461 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:12,469 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 23:03:12,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:12,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 23:03:12,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643852193] [2020-04-17 23:03:12,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:12,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:12,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:12,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:12,470 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 23:03:12,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:12,989 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-04-17 23:03:12,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:03:12,989 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 23:03:12,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:12,990 INFO L225 Difference]: With dead ends: 89 [2020-04-17 23:03:12,990 INFO L226 Difference]: Without dead ends: 83 [2020-04-17 23:03:12,991 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 23:03:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-04-17 23:03:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-04-17 23:03:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 23:03:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 23:03:12,993 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 23:03:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:12,994 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 23:03:12,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:12,994 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 23:03:12,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:12,994 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:12,994 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:13,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:13,195 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:13,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:13,195 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-04-17 23:03:13,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:13,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591029048] [2020-04-17 23:03:13,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:13,302 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 23:03:13,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591029048] [2020-04-17 23:03:13,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814600309] [2020-04-17 23:03:13,303 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 23:03:13,352 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-04-17 23:03:13,352 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:13,353 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:13,354 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:13,370 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 23:03:13,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:13,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 23:03:13,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804089512] [2020-04-17 23:03:13,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:13,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:13,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:13,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:13,372 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 23:03:13,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:13,788 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-04-17 23:03:13,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:03:13,789 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 23:03:13,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:13,790 INFO L225 Difference]: With dead ends: 86 [2020-04-17 23:03:13,790 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 23:03:13,791 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 23:03:13,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 23:03:13,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-04-17 23:03:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 23:03:13,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 23:03:13,794 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-04-17 23:03:13,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:13,794 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 23:03:13,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:13,794 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 23:03:13,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:13,795 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:13,795 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:13,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:13,998 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:13,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:13,999 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-04-17 23:03:13,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:13,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692612867] [2020-04-17 23:03:13,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:14,132 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 23:03:14,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692612867] [2020-04-17 23:03:14,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260078268] [2020-04-17 23:03:14,133 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 23:03:14,198 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-04-17 23:03:14,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:14,199 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:14,200 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:14,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:14,253 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 23:03:14,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:14,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 23:03:14,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712402103] [2020-04-17 23:03:14,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:14,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:14,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:14,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:14,255 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-04-17 23:03:14,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:14,840 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-04-17 23:03:14,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:03:14,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 23:03:14,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:14,842 INFO L225 Difference]: With dead ends: 85 [2020-04-17 23:03:14,842 INFO L226 Difference]: Without dead ends: 79 [2020-04-17 23:03:14,842 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 23:03:14,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-17 23:03:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-04-17 23:03:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 23:03:14,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 23:03:14,844 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-04-17 23:03:14,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:14,845 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 23:03:14,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:14,845 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 23:03:14,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:14,845 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:14,845 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:15,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:15,046 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:15,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:15,047 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-04-17 23:03:15,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:15,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420352828] [2020-04-17 23:03:15,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:15,166 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 23:03:15,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420352828] [2020-04-17 23:03:15,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960834803] [2020-04-17 23:03:15,167 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 23:03:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:15,208 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:15,208 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:15,218 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 23:03:15,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:15,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-04-17 23:03:15,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115638866] [2020-04-17 23:03:15,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 23:03:15,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:15,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 23:03:15,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-04-17 23:03:15,220 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-04-17 23:03:15,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:15,680 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-04-17 23:03:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:03:15,682 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-04-17 23:03:15,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:15,683 INFO L225 Difference]: With dead ends: 101 [2020-04-17 23:03:15,684 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 23:03:15,684 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 23:03:15,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 23:03:15,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-04-17 23:03:15,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 23:03:15,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-04-17 23:03:15,687 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-04-17 23:03:15,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:15,687 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-04-17 23:03:15,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 23:03:15,687 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-04-17 23:03:15,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:15,688 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:15,688 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:15,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:15,890 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:15,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:15,890 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-04-17 23:03:15,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:15,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603522315] [2020-04-17 23:03:15,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:15,987 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 23:03:15,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603522315] [2020-04-17 23:03:15,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264845639] [2020-04-17 23:03:15,988 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 23:03:16,035 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:16,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:16,037 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:16,038 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:16,063 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 23:03:16,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:16,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 23:03:16,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23581609] [2020-04-17 23:03:16,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:16,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:16,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:16,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:16,064 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-04-17 23:03:16,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:16,606 INFO L93 Difference]: Finished difference Result 80 states and 197 transitions. [2020-04-17 23:03:16,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:03:16,606 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 23:03:16,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:16,607 INFO L225 Difference]: With dead ends: 80 [2020-04-17 23:03:16,607 INFO L226 Difference]: Without dead ends: 72 [2020-04-17 23:03:16,607 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 23:03:16,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-04-17 23:03:16,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-04-17 23:03:16,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-04-17 23:03:16,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-04-17 23:03:16,610 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-04-17 23:03:16,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:16,610 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-04-17 23:03:16,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:16,610 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-04-17 23:03:16,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-04-17 23:03:16,611 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:16,611 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:16,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:16,814 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:16,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:16,815 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-04-17 23:03:16,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:16,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141556551] [2020-04-17 23:03:16,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:16,943 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 23:03:16,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141556551] [2020-04-17 23:03:16,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972551285] [2020-04-17 23:03:16,944 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 23:03:16,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-04-17 23:03:16,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:16,999 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-17 23:03:17,000 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:17,012 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:17,022 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 23:03:17,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:17,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-04-17 23:03:17,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108096253] [2020-04-17 23:03:17,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:17,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:17,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:17,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:17,023 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-04-17 23:03:17,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:17,568 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-04-17 23:03:17,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:03:17,569 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-04-17 23:03:17,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:17,570 INFO L225 Difference]: With dead ends: 92 [2020-04-17 23:03:17,571 INFO L226 Difference]: Without dead ends: 87 [2020-04-17 23:03:17,572 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 23:03:17,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-04-17 23:03:17,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-04-17 23:03:17,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 23:03:17,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-04-17 23:03:17,574 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-04-17 23:03:17,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:17,575 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-04-17 23:03:17,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:17,575 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-04-17 23:03:17,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:17,575 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:17,576 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:17,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:17,776 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:17,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:17,777 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-04-17 23:03:17,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:17,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519359527] [2020-04-17 23:03:17,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:17,884 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 23:03:17,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519359527] [2020-04-17 23:03:17,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428913502] [2020-04-17 23:03:17,885 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 23:03:17,931 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:17,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:17,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:17,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:17,950 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:17,959 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 23:03:17,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:17,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 23:03:17,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628182083] [2020-04-17 23:03:17,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:17,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:17,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:17,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:17,960 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-04-17 23:03:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:18,539 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-04-17 23:03:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:03:18,540 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 23:03:18,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:18,540 INFO L225 Difference]: With dead ends: 78 [2020-04-17 23:03:18,541 INFO L226 Difference]: Without dead ends: 73 [2020-04-17 23:03:18,541 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 23:03:18,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-04-17 23:03:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-04-17 23:03:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-04-17 23:03:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-04-17 23:03:18,543 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-04-17 23:03:18,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:18,543 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-04-17 23:03:18,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:18,544 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-04-17 23:03:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:18,544 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:18,544 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:18,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:18,745 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:18,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:18,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-04-17 23:03:18,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:18,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688060289] [2020-04-17 23:03:18,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:18,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:18,914 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 23:03:18,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688060289] [2020-04-17 23:03:18,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797668831] [2020-04-17 23:03:18,915 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 23:03:18,968 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 23:03:18,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:18,969 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:18,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:18,981 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 23:03:18,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:18,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 23:03:18,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293013089] [2020-04-17 23:03:18,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:18,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:18,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:18,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:18,982 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-04-17 23:03:19,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:19,223 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-04-17 23:03:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-04-17 23:03:19,223 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 23:03:19,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:19,224 INFO L225 Difference]: With dead ends: 84 [2020-04-17 23:03:19,224 INFO L226 Difference]: Without dead ends: 78 [2020-04-17 23:03:19,224 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 23:03:19,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-04-17 23:03:19,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-04-17 23:03:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:03:19,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-04-17 23:03:19,227 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-04-17 23:03:19,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:19,227 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-04-17 23:03:19,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-04-17 23:03:19,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:19,228 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:19,228 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:19,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:19,428 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:19,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:19,429 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-04-17 23:03:19,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:19,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496235356] [2020-04-17 23:03:19,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:19,610 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 23:03:19,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496235356] [2020-04-17 23:03:19,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409250455] [2020-04-17 23:03:19,611 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 23:03:19,666 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 23:03:19,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:19,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:19,668 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:19,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:19,688 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 23:03:19,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:19,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 23:03:19,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484249888] [2020-04-17 23:03:19,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:19,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:19,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:19,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:19,690 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-04-17 23:03:20,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:20,009 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-04-17 23:03:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-04-17 23:03:20,010 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 23:03:20,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:20,011 INFO L225 Difference]: With dead ends: 98 [2020-04-17 23:03:20,011 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 23:03:20,011 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 23:03:20,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 23:03:20,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-04-17 23:03:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-04-17 23:03:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-04-17 23:03:20,014 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-04-17 23:03:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:20,014 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-04-17 23:03:20,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-04-17 23:03:20,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:20,015 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:20,015 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:20,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:20,218 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:20,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:20,219 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-04-17 23:03:20,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:20,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624972209] [2020-04-17 23:03:20,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:20,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:20,363 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 23:03:20,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624972209] [2020-04-17 23:03:20,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824600643] [2020-04-17 23:03:20,364 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 23:03:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:20,413 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:20,414 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:20,433 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 23:03:20,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:20,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 23:03:20,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330700608] [2020-04-17 23:03:20,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:20,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:20,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:20,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:20,434 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-04-17 23:03:20,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:20,765 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-04-17 23:03:20,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:03:20,766 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 23:03:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:20,767 INFO L225 Difference]: With dead ends: 99 [2020-04-17 23:03:20,767 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 23:03:20,767 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 23:03:20,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 23:03:20,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-04-17 23:03:20,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-04-17 23:03:20,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-04-17 23:03:20,770 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-04-17 23:03:20,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:20,770 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-04-17 23:03:20,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:20,770 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-04-17 23:03:20,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:20,771 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:20,771 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:20,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:20,972 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:20,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-04-17 23:03:20,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:20,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572166070] [2020-04-17 23:03:20,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:20,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:21,134 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 23:03:21,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572166070] [2020-04-17 23:03:21,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419858490] [2020-04-17 23:03:21,135 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 23:03:21,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:21,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:21,186 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:21,187 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:21,202 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:21,211 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 23:03:21,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:21,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 23:03:21,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487413209] [2020-04-17 23:03:21,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:21,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:21,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:21,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:21,212 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-04-17 23:03:21,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:21,598 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-04-17 23:03:21,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:03:21,599 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 23:03:21,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:21,600 INFO L225 Difference]: With dead ends: 109 [2020-04-17 23:03:21,600 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 23:03:21,600 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 23:03:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 23:03:21,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-04-17 23:03:21,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:03:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-04-17 23:03:21,603 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-04-17 23:03:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:21,604 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-04-17 23:03:21,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-04-17 23:03:21,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:21,604 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:21,604 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:21,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:21,807 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:21,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:21,808 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-04-17 23:03:21,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:21,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351307639] [2020-04-17 23:03:21,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:21,943 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 23:03:21,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351307639] [2020-04-17 23:03:21,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843176588] [2020-04-17 23:03:21,944 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 23:03:21,996 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 23:03:21,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:21,997 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:21,998 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:22,030 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 23:03:22,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:22,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 23:03:22,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102138065] [2020-04-17 23:03:22,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:22,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:22,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:22,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:22,032 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-04-17 23:03:22,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:22,405 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-04-17 23:03:22,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:03:22,405 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 23:03:22,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:22,407 INFO L225 Difference]: With dead ends: 109 [2020-04-17 23:03:22,407 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 23:03:22,407 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 23:03:22,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 23:03:22,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-04-17 23:03:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-17 23:03:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-04-17 23:03:22,410 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-04-17 23:03:22,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:22,411 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-04-17 23:03:22,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:22,411 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-04-17 23:03:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:22,411 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:22,411 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:22,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:22,615 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:22,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:22,615 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-04-17 23:03:22,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:22,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307962155] [2020-04-17 23:03:22,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:22,758 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 23:03:22,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307962155] [2020-04-17 23:03:22,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450321499] [2020-04-17 23:03:22,759 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 23:03:22,806 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:22,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:22,807 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:22,808 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:22,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:22,834 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 23:03:22,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:22,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 23:03:22,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078115263] [2020-04-17 23:03:22,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:22,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:22,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:22,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:22,835 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-04-17 23:03:23,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:23,283 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-04-17 23:03:23,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:03:23,284 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 23:03:23,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:23,285 INFO L225 Difference]: With dead ends: 106 [2020-04-17 23:03:23,285 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 23:03:23,285 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 23:03:23,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 23:03:23,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-04-17 23:03:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 23:03:23,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-04-17 23:03:23,288 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-04-17 23:03:23,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:23,288 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-04-17 23:03:23,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:23,289 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-04-17 23:03:23,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:23,289 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:23,289 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:23,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:23,493 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:23,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:23,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-04-17 23:03:23,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:23,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141235526] [2020-04-17 23:03:23,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:23,672 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 23:03:23,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141235526] [2020-04-17 23:03:23,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092394652] [2020-04-17 23:03:23,673 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 23:03:23,757 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 23:03:23,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:23,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:23,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:23,778 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 23:03:23,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:23,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 23:03:23,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425635999] [2020-04-17 23:03:23,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:23,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:23,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:23,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:23,781 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-04-17 23:03:24,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:24,423 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-04-17 23:03:24,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:03:24,424 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 23:03:24,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:24,425 INFO L225 Difference]: With dead ends: 107 [2020-04-17 23:03:24,425 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 23:03:24,426 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 23:03:24,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 23:03:24,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-04-17 23:03:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-17 23:03:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-04-17 23:03:24,429 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-04-17 23:03:24,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:24,430 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-04-17 23:03:24,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:24,430 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-04-17 23:03:24,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:24,431 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:24,431 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:24,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:24,638 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:24,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:24,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-04-17 23:03:24,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:24,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866428364] [2020-04-17 23:03:24,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:24,864 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 23:03:24,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866428364] [2020-04-17 23:03:24,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144390530] [2020-04-17 23:03:24,865 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 23:03:24,952 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 23:03:24,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:24,953 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:24,955 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:24,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:24,993 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 23:03:24,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:24,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 23:03:24,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71726869] [2020-04-17 23:03:24,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:24,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:24,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:24,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:24,996 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-04-17 23:03:25,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:25,554 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-04-17 23:03:25,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:03:25,555 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 23:03:25,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:25,556 INFO L225 Difference]: With dead ends: 104 [2020-04-17 23:03:25,556 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 23:03:25,557 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-04-17 23:03:25,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 23:03:25,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-04-17 23:03:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 23:03:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-04-17 23:03:25,560 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-04-17 23:03:25,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:25,560 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-04-17 23:03:25,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:25,561 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-04-17 23:03:25,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:25,561 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:25,561 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:25,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:25,765 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:25,765 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-04-17 23:03:25,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:25,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120902460] [2020-04-17 23:03:25,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:25,888 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 23:03:25,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120902460] [2020-04-17 23:03:25,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086869806] [2020-04-17 23:03:25,889 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 23:03:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:25,938 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:25,939 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:25,971 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 23:03:25,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:25,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 23:03:25,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853859584] [2020-04-17 23:03:25,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:25,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:25,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:25,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:25,973 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-04-17 23:03:26,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:26,433 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-04-17 23:03:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:03:26,434 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 23:03:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:26,435 INFO L225 Difference]: With dead ends: 105 [2020-04-17 23:03:26,435 INFO L226 Difference]: Without dead ends: 99 [2020-04-17 23:03:26,440 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 23:03:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-04-17 23:03:26,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-04-17 23:03:26,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 23:03:26,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-04-17 23:03:26,443 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-04-17 23:03:26,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:26,443 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-04-17 23:03:26,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:26,443 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-04-17 23:03:26,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:26,443 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:26,443 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:26,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:26,646 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:26,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:26,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-04-17 23:03:26,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:26,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539630282] [2020-04-17 23:03:26,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:26,769 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 23:03:26,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539630282] [2020-04-17 23:03:26,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851378248] [2020-04-17 23:03:26,770 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 23:03:26,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:26,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:26,819 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:26,820 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:26,844 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:26,854 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 23:03:26,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:26,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 23:03:26,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724875228] [2020-04-17 23:03:26,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:26,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:26,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:26,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:26,855 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-04-17 23:03:27,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:27,438 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-04-17 23:03:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:03:27,438 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 23:03:27,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:27,439 INFO L225 Difference]: With dead ends: 102 [2020-04-17 23:03:27,439 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 23:03:27,439 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 23:03:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 23:03:27,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-04-17 23:03:27,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 23:03:27,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-04-17 23:03:27,442 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-04-17 23:03:27,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:27,442 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-04-17 23:03:27,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-04-17 23:03:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:27,442 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:27,442 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:27,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:27,643 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:27,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:27,644 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-04-17 23:03:27,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:27,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318497168] [2020-04-17 23:03:27,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:27,767 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 23:03:27,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318497168] [2020-04-17 23:03:27,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525294980] [2020-04-17 23:03:27,768 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 23:03:27,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 23:03:27,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:27,820 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:03:27,821 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:27,847 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 23:03:27,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:27,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 23:03:27,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507732426] [2020-04-17 23:03:27,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:27,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:27,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:27,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:27,849 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-04-17 23:03:28,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:28,356 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-04-17 23:03:28,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:03:28,357 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 23:03:28,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:28,358 INFO L225 Difference]: With dead ends: 103 [2020-04-17 23:03:28,358 INFO L226 Difference]: Without dead ends: 97 [2020-04-17 23:03:28,358 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 23:03:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-04-17 23:03:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-04-17 23:03:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 23:03:28,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-04-17 23:03:28,361 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-04-17 23:03:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:28,361 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-04-17 23:03:28,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-04-17 23:03:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:28,362 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:28,362 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:28,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:28,565 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:28,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:28,566 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-04-17 23:03:28,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:28,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414596092] [2020-04-17 23:03:28,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:28,721 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 23:03:28,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414596092] [2020-04-17 23:03:28,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601676922] [2020-04-17 23:03:28,722 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 23:03:28,793 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:28,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:28,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:28,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:28,822 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:28,839 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 23:03:28,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:28,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 23:03:28,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955564619] [2020-04-17 23:03:28,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:28,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:28,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:28,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:28,841 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-04-17 23:03:29,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:29,556 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-04-17 23:03:29,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 23:03:29,557 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 23:03:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:29,558 INFO L225 Difference]: With dead ends: 100 [2020-04-17 23:03:29,558 INFO L226 Difference]: Without dead ends: 94 [2020-04-17 23:03:29,558 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 23:03:29,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-04-17 23:03:29,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-04-17 23:03:29,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 23:03:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-04-17 23:03:29,561 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-04-17 23:03:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:29,561 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-04-17 23:03:29,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:29,561 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-04-17 23:03:29,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:29,562 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:29,562 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:29,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:29,765 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:29,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:29,766 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-04-17 23:03:29,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:29,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532742860] [2020-04-17 23:03:29,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:29,873 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 23:03:29,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532742860] [2020-04-17 23:03:29,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724662080] [2020-04-17 23:03:29,874 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 23:03:29,926 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 23:03:29,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:29,928 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:29,929 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:29,956 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 23:03:29,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:29,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-04-17 23:03:29,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766428120] [2020-04-17 23:03:29,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-17 23:03:29,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:29,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-17 23:03:29,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-04-17 23:03:29,958 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-04-17 23:03:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:30,573 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-04-17 23:03:30,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:03:30,574 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-04-17 23:03:30,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:30,575 INFO L225 Difference]: With dead ends: 120 [2020-04-17 23:03:30,575 INFO L226 Difference]: Without dead ends: 114 [2020-04-17 23:03:30,576 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 23:03:30,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-17 23:03:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-04-17 23:03:30,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 23:03:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-04-17 23:03:30,579 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-04-17 23:03:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:30,579 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-04-17 23:03:30,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-17 23:03:30,579 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-04-17 23:03:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-04-17 23:03:30,579 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:30,580 INFO L425 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:30,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:30,784 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:30,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:30,784 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-04-17 23:03:30,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:30,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013757581] [2020-04-17 23:03:30,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:30,972 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 23:03:30,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013757581] [2020-04-17 23:03:30,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492767236] [2020-04-17 23:03:30,973 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:03:31,051 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 23:03:31,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:31,052 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-04-17 23:03:31,054 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:31,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:31,100 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 23:03:31,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:31,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-04-17 23:03:31,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418482069] [2020-04-17 23:03:31,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:31,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:31,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:31,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:31,102 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-04-17 23:03:31,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:31,771 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-04-17 23:03:31,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:03:31,771 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-04-17 23:03:31,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:31,772 INFO L225 Difference]: With dead ends: 101 [2020-04-17 23:03:31,772 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 23:03:31,773 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-04-17 23:03:31,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 23:03:31,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-04-17 23:03:31,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-17 23:03:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-04-17 23:03:31,775 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-04-17 23:03:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:31,775 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-04-17 23:03:31,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:31,776 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-04-17 23:03:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:31,776 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:31,776 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:31,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:31,977 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:31,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:31,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-04-17 23:03:31,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:31,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763893752] [2020-04-17 23:03:31,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:32,153 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 23:03:32,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763893752] [2020-04-17 23:03:32,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718088391] [2020-04-17 23:03:32,153 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 23:03:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:32,200 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:32,201 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:32,208 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 23:03:32,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:32,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 23:03:32,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338587224] [2020-04-17 23:03:32,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:32,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:32,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:32,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:32,209 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-04-17 23:03:32,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:32,513 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-04-17 23:03:32,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:03:32,513 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 23:03:32,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:32,514 INFO L225 Difference]: With dead ends: 114 [2020-04-17 23:03:32,514 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 23:03:32,514 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 23:03:32,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 23:03:32,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-04-17 23:03:32,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:03:32,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 23:03:32,517 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 23:03:32,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:32,519 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 23:03:32,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 23:03:32,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:32,520 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:32,520 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:32,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:32,721 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:32,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:32,721 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-04-17 23:03:32,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:32,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985259030] [2020-04-17 23:03:32,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:32,877 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 23:03:32,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985259030] [2020-04-17 23:03:32,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424634795] [2020-04-17 23:03:32,878 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 23:03:32,921 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:32,922 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:32,922 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:32,923 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:32,937 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:32,945 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 23:03:32,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:32,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 23:03:32,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933522316] [2020-04-17 23:03:32,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:32,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:32,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:32,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:32,947 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 23:03:33,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:33,334 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-04-17 23:03:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:03:33,335 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 23:03:33,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:33,335 INFO L225 Difference]: With dead ends: 111 [2020-04-17 23:03:33,335 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 23:03:33,336 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 23:03:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 23:03:33,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-04-17 23:03:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:03:33,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 23:03:33,338 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 23:03:33,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:33,338 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 23:03:33,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:33,338 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 23:03:33,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:33,339 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:33,339 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:33,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:33,542 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:33,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:33,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-04-17 23:03:33,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:33,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071504603] [2020-04-17 23:03:33,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:33,692 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 23:03:33,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071504603] [2020-04-17 23:03:33,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681200138] [2020-04-17 23:03:33,693 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 23:03:33,746 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 23:03:33,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:33,747 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:33,748 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:33,758 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 23:03:33,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:33,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 23:03:33,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614014403] [2020-04-17 23:03:33,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:33,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:33,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:33,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:33,759 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 23:03:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:34,104 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-04-17 23:03:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:03:34,104 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 23:03:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:34,105 INFO L225 Difference]: With dead ends: 108 [2020-04-17 23:03:34,105 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 23:03:34,106 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-04-17 23:03:34,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 23:03:34,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-04-17 23:03:34,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:03:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 23:03:34,107 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 23:03:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:34,108 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 23:03:34,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 23:03:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:34,108 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:34,108 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:34,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:34,312 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:34,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:34,312 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-04-17 23:03:34,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:34,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211525461] [2020-04-17 23:03:34,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:34,480 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 23:03:34,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211525461] [2020-04-17 23:03:34,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339124961] [2020-04-17 23:03:34,481 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 23:03:34,532 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:34,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:34,533 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:34,533 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:34,553 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:34,562 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 23:03:34,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:34,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 23:03:34,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103821834] [2020-04-17 23:03:34,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:34,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:34,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:34,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:34,563 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 23:03:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:35,013 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-04-17 23:03:35,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:03:35,013 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 23:03:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:35,014 INFO L225 Difference]: With dead ends: 107 [2020-04-17 23:03:35,014 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 23:03:35,014 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-04-17 23:03:35,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 23:03:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-04-17 23:03:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:03:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 23:03:35,017 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 23:03:35,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:35,018 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 23:03:35,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:35,018 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 23:03:35,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:35,019 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:35,019 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:35,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:35,222 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:35,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:35,223 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-04-17 23:03:35,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:35,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465856293] [2020-04-17 23:03:35,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:35,363 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 23:03:35,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465856293] [2020-04-17 23:03:35,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283937953] [2020-04-17 23:03:35,364 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 23:03:35,415 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 23:03:35,416 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:35,417 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:35,417 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:35,426 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 23:03:35,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:35,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 23:03:35,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135912152] [2020-04-17 23:03:35,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:35,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:35,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:35,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:35,427 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 23:03:35,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:35,836 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-04-17 23:03:35,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:03:35,837 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 23:03:35,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:35,837 INFO L225 Difference]: With dead ends: 104 [2020-04-17 23:03:35,837 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 23:03:35,838 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 23:03:35,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 23:03:35,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-04-17 23:03:35,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:03:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 23:03:35,840 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 23:03:35,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:35,841 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 23:03:35,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 23:03:35,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:35,841 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:35,841 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:36,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:36,045 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:36,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:36,045 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-04-17 23:03:36,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:36,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055971465] [2020-04-17 23:03:36,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:36,186 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 23:03:36,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055971465] [2020-04-17 23:03:36,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519818892] [2020-04-17 23:03:36,187 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 23:03:36,239 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 23:03:36,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:36,241 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:36,241 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:36,256 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:36,264 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 23:03:36,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:36,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 23:03:36,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421712687] [2020-04-17 23:03:36,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:36,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:36,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:36,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:36,266 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 23:03:36,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:36,784 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-04-17 23:03:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:03:36,785 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 23:03:36,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:36,786 INFO L225 Difference]: With dead ends: 103 [2020-04-17 23:03:36,786 INFO L226 Difference]: Without dead ends: 97 [2020-04-17 23:03:36,786 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-04-17 23:03:36,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-04-17 23:03:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-04-17 23:03:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:03:36,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 23:03:36,789 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 23:03:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:36,789 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 23:03:36,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:36,790 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 23:03:36,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:36,790 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:36,790 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:36,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:36,993 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:36,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:36,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-04-17 23:03:36,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:36,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396289450] [2020-04-17 23:03:36,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:37,142 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 23:03:37,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396289450] [2020-04-17 23:03:37,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331167839] [2020-04-17 23:03:37,143 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 23:03:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:37,195 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:37,196 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:37,207 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 23:03:37,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:37,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 23:03:37,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725702347] [2020-04-17 23:03:37,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:37,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:37,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:37,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:37,208 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 23:03:37,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:37,661 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-04-17 23:03:37,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:03:37,662 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 23:03:37,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:37,663 INFO L225 Difference]: With dead ends: 100 [2020-04-17 23:03:37,663 INFO L226 Difference]: Without dead ends: 94 [2020-04-17 23:03:37,663 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 23:03:37,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-04-17 23:03:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-04-17 23:03:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:03:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 23:03:37,666 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 23:03:37,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:37,666 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 23:03:37,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:37,667 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 23:03:37,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:37,667 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:37,667 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:37,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:37,870 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:37,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:37,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-04-17 23:03:37,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:37,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994444803] [2020-04-17 23:03:37,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:38,005 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 23:03:38,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994444803] [2020-04-17 23:03:38,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984448193] [2020-04-17 23:03:38,006 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 23:03:38,056 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:38,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:38,057 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:38,058 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:38,073 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:38,081 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 23:03:38,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:38,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 23:03:38,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441976558] [2020-04-17 23:03:38,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:38,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:38,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:38,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:38,082 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 23:03:38,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:38,700 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-04-17 23:03:38,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:03:38,702 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 23:03:38,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:38,703 INFO L225 Difference]: With dead ends: 99 [2020-04-17 23:03:38,703 INFO L226 Difference]: Without dead ends: 93 [2020-04-17 23:03:38,703 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-04-17 23:03:38,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-04-17 23:03:38,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-04-17 23:03:38,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:03:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 23:03:38,705 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 23:03:38,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:38,705 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 23:03:38,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 23:03:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:38,706 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:38,706 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:38,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:38,907 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:38,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:38,907 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-04-17 23:03:38,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:38,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443714495] [2020-04-17 23:03:38,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:39,025 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 23:03:39,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443714495] [2020-04-17 23:03:39,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741070050] [2020-04-17 23:03:39,026 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 23:03:39,082 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 23:03:39,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:39,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:39,084 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:39,095 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 23:03:39,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:39,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 23:03:39,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803680507] [2020-04-17 23:03:39,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:39,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:39,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:39,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:39,096 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 23:03:39,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:39,579 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-04-17 23:03:39,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:03:39,580 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 23:03:39,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:39,580 INFO L225 Difference]: With dead ends: 96 [2020-04-17 23:03:39,580 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 23:03:39,581 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 23:03:39,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 23:03:39,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-04-17 23:03:39,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:03:39,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 23:03:39,583 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 23:03:39,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:39,584 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 23:03:39,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:39,584 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 23:03:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:39,584 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:39,585 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:39,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:39,788 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:39,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:39,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-04-17 23:03:39,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:39,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400814200] [2020-04-17 23:03:39,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:39,913 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 23:03:39,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400814200] [2020-04-17 23:03:39,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617159931] [2020-04-17 23:03:39,914 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 23:03:39,962 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:39,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:39,962 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:39,963 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:39,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:39,997 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 23:03:40,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:40,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 23:03:40,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855853145] [2020-04-17 23:03:40,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:40,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:40,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:40,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:40,004 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 23:03:40,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:40,638 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-04-17 23:03:40,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 23:03:40,639 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 23:03:40,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:40,639 INFO L225 Difference]: With dead ends: 95 [2020-04-17 23:03:40,639 INFO L226 Difference]: Without dead ends: 89 [2020-04-17 23:03:40,640 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 23:03:40,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-04-17 23:03:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-04-17 23:03:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:03:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 23:03:40,643 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 23:03:40,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:40,643 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 23:03:40,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:40,643 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 23:03:40,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:40,644 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:40,644 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:40,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:40,847 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:40,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:40,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-04-17 23:03:40,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:40,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887575195] [2020-04-17 23:03:40,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:40,970 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 23:03:40,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887575195] [2020-04-17 23:03:40,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447896601] [2020-04-17 23:03:40,971 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 23:03:41,014 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-17 23:03:41,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:41,015 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:41,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:41,037 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 23:03:41,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:41,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 23:03:41,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665484692] [2020-04-17 23:03:41,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:41,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:41,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:41,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:41,039 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 23:03:41,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:41,560 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-04-17 23:03:41,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:03:41,560 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 23:03:41,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:41,561 INFO L225 Difference]: With dead ends: 92 [2020-04-17 23:03:41,561 INFO L226 Difference]: Without dead ends: 86 [2020-04-17 23:03:41,561 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 23:03:41,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-04-17 23:03:41,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-04-17 23:03:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:03:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 23:03:41,563 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-04-17 23:03:41,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:41,564 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 23:03:41,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:41,564 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 23:03:41,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:41,564 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:41,564 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:41,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:41,765 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:41,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:41,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-04-17 23:03:41,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:41,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060046825] [2020-04-17 23:03:41,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:41,927 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 23:03:41,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060046825] [2020-04-17 23:03:41,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655868092] [2020-04-17 23:03:41,928 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 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 23:03:41,986 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-17 23:03:41,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:41,988 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:41,989 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:42,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:42,059 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 23:03:42,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:42,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 23:03:42,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186863568] [2020-04-17 23:03:42,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:42,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:42,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:42,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:42,061 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-04-17 23:03:42,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:42,972 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-04-17 23:03:42,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:03:42,973 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 23:03:42,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:42,974 INFO L225 Difference]: With dead ends: 91 [2020-04-17 23:03:42,974 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 23:03:42,974 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 23:03:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 23:03:42,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-04-17 23:03:42,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:03:42,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 23:03:42,977 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-04-17 23:03:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:42,978 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 23:03:42,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:42,978 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 23:03:42,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:42,979 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:42,979 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:43,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:43,184 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:43,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:43,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-04-17 23:03:43,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:43,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993721291] [2020-04-17 23:03:43,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:43,381 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 23:03:43,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993721291] [2020-04-17 23:03:43,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443146153] [2020-04-17 23:03:43,382 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 23:03:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:43,433 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:43,434 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:43,451 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 23:03:43,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:43,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-04-17 23:03:43,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594479461] [2020-04-17 23:03:43,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 23:03:43,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:43,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 23:03:43,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-04-17 23:03:43,452 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-04-17 23:03:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:44,005 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-04-17 23:03:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:03:44,006 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-04-17 23:03:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:44,006 INFO L225 Difference]: With dead ends: 107 [2020-04-17 23:03:44,006 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 23:03:44,007 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 23:03:44,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 23:03:44,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-04-17 23:03:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 23:03:44,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-04-17 23:03:44,009 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-04-17 23:03:44,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:44,009 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-04-17 23:03:44,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 23:03:44,010 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-04-17 23:03:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:44,010 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:44,010 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:44,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:44,211 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:44,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-04-17 23:03:44,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:44,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500177557] [2020-04-17 23:03:44,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:44,328 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 23:03:44,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500177557] [2020-04-17 23:03:44,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206931441] [2020-04-17 23:03:44,329 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 23:03:44,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:44,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:44,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:44,381 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:44,395 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:44,408 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 23:03:44,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:44,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 23:03:44,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758567930] [2020-04-17 23:03:44,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:44,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:44,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:44,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:44,409 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-04-17 23:03:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:45,122 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-04-17 23:03:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 23:03:45,122 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 23:03:45,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:45,123 INFO L225 Difference]: With dead ends: 88 [2020-04-17 23:03:45,123 INFO L226 Difference]: Without dead ends: 80 [2020-04-17 23:03:45,124 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 23:03:45,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-04-17 23:03:45,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-04-17 23:03:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-04-17 23:03:45,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-04-17 23:03:45,126 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-04-17 23:03:45,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:45,126 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-04-17 23:03:45,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-04-17 23:03:45,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-04-17 23:03:45,126 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:45,127 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:45,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:45,327 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:45,328 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-04-17 23:03:45,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:45,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967537996] [2020-04-17 23:03:45,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:45,451 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 23:03:45,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967537996] [2020-04-17 23:03:45,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259768918] [2020-04-17 23:03:45,452 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 23:03:45,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-04-17 23:03:45,502 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:45,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-17 23:03:45,503 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:45,516 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:45,527 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 23:03:45,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:45,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-04-17 23:03:45,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347562304] [2020-04-17 23:03:45,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:45,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:45,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:45,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:45,528 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-04-17 23:03:46,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:46,187 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-04-17 23:03:46,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:03:46,188 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-04-17 23:03:46,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:46,188 INFO L225 Difference]: With dead ends: 100 [2020-04-17 23:03:46,188 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 23:03:46,189 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 23:03:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 23:03:46,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-04-17 23:03:46,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 23:03:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-04-17 23:03:46,191 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-04-17 23:03:46,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:46,191 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-04-17 23:03:46,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:46,191 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-04-17 23:03:46,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:46,192 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:46,192 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:46,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:46,393 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:46,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:46,393 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-04-17 23:03:46,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:46,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993415335] [2020-04-17 23:03:46,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:46,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:46,522 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 23:03:46,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993415335] [2020-04-17 23:03:46,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318382175] [2020-04-17 23:03:46,523 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 23:03:46,570 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:46,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:46,571 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:46,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:46,587 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:46,598 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 23:03:46,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:46,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:03:46,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587866189] [2020-04-17 23:03:46,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:03:46,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:46,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:03:46,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:03:46,600 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-04-17 23:03:47,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:47,333 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-04-17 23:03:47,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:03:47,334 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:03:47,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:47,334 INFO L225 Difference]: With dead ends: 84 [2020-04-17 23:03:47,334 INFO L226 Difference]: Without dead ends: 79 [2020-04-17 23:03:47,335 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 23:03:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-04-17 23:03:47,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-04-17 23:03:47,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-04-17 23:03:47,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-04-17 23:03:47,337 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-04-17 23:03:47,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:47,337 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-04-17 23:03:47,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:03:47,337 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-04-17 23:03:47,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:47,338 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:47,338 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:47,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:47,540 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:47,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:47,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-04-17 23:03:47,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:47,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348991804] [2020-04-17 23:03:47,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:47,718 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 23:03:47,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348991804] [2020-04-17 23:03:47,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398178886] [2020-04-17 23:03:47,718 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 23:03:47,771 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 23:03:47,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:47,773 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:47,774 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:47,787 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 23:03:47,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:47,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 23:03:47,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273971870] [2020-04-17 23:03:47,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:47,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:47,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:47,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:47,789 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-04-17 23:03:48,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:48,085 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-04-17 23:03:48,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-17 23:03:48,085 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 23:03:48,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:48,086 INFO L225 Difference]: With dead ends: 90 [2020-04-17 23:03:48,086 INFO L226 Difference]: Without dead ends: 84 [2020-04-17 23:03:48,086 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 23:03:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-04-17 23:03:48,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-04-17 23:03:48,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 23:03:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-04-17 23:03:48,088 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-04-17 23:03:48,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:48,088 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-04-17 23:03:48,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:48,089 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-04-17 23:03:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:48,089 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:48,090 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:48,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:48,293 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:48,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:48,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-04-17 23:03:48,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:48,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787663791] [2020-04-17 23:03:48,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:48,469 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 23:03:48,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787663791] [2020-04-17 23:03:48,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322622980] [2020-04-17 23:03:48,470 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 23:03:48,520 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 23:03:48,520 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:48,522 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:48,522 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:48,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:48,547 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 23:03:48,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:48,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:03:48,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526647871] [2020-04-17 23:03:48,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:03:48,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:48,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:03:48,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:03:48,549 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-04-17 23:03:48,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:48,926 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-04-17 23:03:48,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-04-17 23:03:48,927 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:03:48,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:48,927 INFO L225 Difference]: With dead ends: 106 [2020-04-17 23:03:48,928 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 23:03:48,929 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-04-17 23:03:48,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 23:03:48,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-04-17 23:03:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-04-17 23:03:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-04-17 23:03:48,931 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-04-17 23:03:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:48,931 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-04-17 23:03:48,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:03:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-04-17 23:03:48,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:48,931 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:48,932 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:49,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:49,134 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:49,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:49,134 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-04-17 23:03:49,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:49,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864472684] [2020-04-17 23:03:49,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:49,293 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 23:03:49,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864472684] [2020-04-17 23:03:49,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889162179] [2020-04-17 23:03:49,294 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 23:03:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:49,344 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:49,345 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:49,353 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 23:03:49,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:49,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 23:03:49,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958251047] [2020-04-17 23:03:49,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:49,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:49,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:49,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:49,354 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-04-17 23:03:49,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:49,737 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-04-17 23:03:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:03:49,738 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 23:03:49,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:49,738 INFO L225 Difference]: With dead ends: 107 [2020-04-17 23:03:49,739 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 23:03:49,739 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 23:03:49,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 23:03:49,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-04-17 23:03:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-04-17 23:03:49,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-04-17 23:03:49,741 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-04-17 23:03:49,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:49,742 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-04-17 23:03:49,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:49,742 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-04-17 23:03:49,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:49,743 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:49,743 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:49,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:49,946 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:49,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:49,947 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-04-17 23:03:49,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:49,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251690928] [2020-04-17 23:03:49,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:50,127 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 23:03:50,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251690928] [2020-04-17 23:03:50,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720778445] [2020-04-17 23:03:50,127 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 23:03:50,176 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:50,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:50,178 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:50,179 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:50,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:50,205 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 23:03:50,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:50,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:03:50,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640503776] [2020-04-17 23:03:50,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:03:50,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:50,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:03:50,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:03:50,207 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-04-17 23:03:50,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:50,625 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-04-17 23:03:50,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:03:50,625 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:03:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:50,626 INFO L225 Difference]: With dead ends: 119 [2020-04-17 23:03:50,626 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 23:03:50,626 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 23:03:50,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 23:03:50,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-04-17 23:03:50,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 23:03:50,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-04-17 23:03:50,629 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-04-17 23:03:50,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:50,629 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-04-17 23:03:50,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:03:50,629 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-04-17 23:03:50,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:50,629 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:50,630 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:50,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:50,831 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:50,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:50,831 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-04-17 23:03:50,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:50,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982635716] [2020-04-17 23:03:50,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:50,990 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 23:03:50,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982635716] [2020-04-17 23:03:50,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452357191] [2020-04-17 23:03:50,991 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 23:03:51,042 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 23:03:51,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:51,043 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:51,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:51,051 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 23:03:51,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:51,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 23:03:51,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159714711] [2020-04-17 23:03:51,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:51,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:51,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:51,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:51,053 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-04-17 23:03:51,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:51,472 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-04-17 23:03:51,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:03:51,472 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 23:03:51,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:51,473 INFO L225 Difference]: With dead ends: 119 [2020-04-17 23:03:51,473 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 23:03:51,473 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 23:03:51,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 23:03:51,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-04-17 23:03:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-04-17 23:03:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-04-17 23:03:51,476 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-04-17 23:03:51,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:51,476 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-04-17 23:03:51,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:51,476 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-04-17 23:03:51,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:51,477 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:51,477 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:51,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:51,680 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:51,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:51,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-04-17 23:03:51,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:51,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542722482] [2020-04-17 23:03:51,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:51,849 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 23:03:51,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542722482] [2020-04-17 23:03:51,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373998379] [2020-04-17 23:03:51,850 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 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 23:03:51,898 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:51,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:51,899 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:51,899 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:51,913 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:51,921 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 23:03:51,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:51,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:03:51,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508128665] [2020-04-17 23:03:51,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:03:51,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:51,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:03:51,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:03:51,922 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-04-17 23:03:52,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:52,409 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-04-17 23:03:52,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:03:52,409 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:03:52,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:52,410 INFO L225 Difference]: With dead ends: 116 [2020-04-17 23:03:52,410 INFO L226 Difference]: Without dead ends: 110 [2020-04-17 23:03:52,411 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-04-17 23:03:52,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-17 23:03:52,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-04-17 23:03:52,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 23:03:52,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-04-17 23:03:52,413 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-04-17 23:03:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:52,413 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-04-17 23:03:52,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:03:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-04-17 23:03:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:52,413 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:52,414 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:52,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:52,614 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:52,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:52,615 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-04-17 23:03:52,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:52,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784582263] [2020-04-17 23:03:52,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:52,761 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 23:03:52,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784582263] [2020-04-17 23:03:52,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358220328] [2020-04-17 23:03:52,762 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 23:03:52,814 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 23:03:52,814 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:52,816 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:52,817 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:52,827 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 23:03:52,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:52,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 23:03:52,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593573084] [2020-04-17 23:03:52,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:52,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:52,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:52,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:52,830 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-04-17 23:03:53,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:53,280 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-04-17 23:03:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:03:53,286 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 23:03:53,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:53,287 INFO L225 Difference]: With dead ends: 117 [2020-04-17 23:03:53,287 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 23:03:53,287 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 23:03:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 23:03:53,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-04-17 23:03:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 23:03:53,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-04-17 23:03:53,289 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-04-17 23:03:53,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:53,290 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-04-17 23:03:53,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:53,290 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-04-17 23:03:53,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:53,290 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:53,290 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:53,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:53,493 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:53,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:53,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-04-17 23:03:53,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:53,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002734550] [2020-04-17 23:03:53,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:53,709 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 23:03:53,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002734550] [2020-04-17 23:03:53,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68030268] [2020-04-17 23:03:53,710 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 23:03:53,793 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 23:03:53,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:53,795 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:53,796 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:53,838 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:53,849 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 23:03:53,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:53,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:03:53,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378947937] [2020-04-17 23:03:53,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:03:53,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:53,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:03:53,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:03:53,851 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-04-17 23:03:54,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:54,397 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-04-17 23:03:54,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:03:54,397 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:03:54,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:54,398 INFO L225 Difference]: With dead ends: 114 [2020-04-17 23:03:54,398 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 23:03:54,398 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 23:03:54,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 23:03:54,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-04-17 23:03:54,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 23:03:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-04-17 23:03:54,401 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-04-17 23:03:54,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:54,401 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-04-17 23:03:54,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:03:54,401 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-04-17 23:03:54,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:54,401 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:54,402 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:54,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:54,605 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:54,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:54,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-04-17 23:03:54,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:54,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402213662] [2020-04-17 23:03:54,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:54,756 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 23:03:54,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402213662] [2020-04-17 23:03:54,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205671269] [2020-04-17 23:03:54,756 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:03:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:54,805 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:54,806 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:54,839 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 23:03:54,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:54,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 23:03:54,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349026542] [2020-04-17 23:03:54,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:54,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:54,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:54,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:54,840 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-04-17 23:03:55,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:55,352 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-04-17 23:03:55,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:03:55,353 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 23:03:55,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:55,353 INFO L225 Difference]: With dead ends: 115 [2020-04-17 23:03:55,353 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 23:03:55,354 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 23:03:55,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 23:03:55,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-04-17 23:03:55,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-17 23:03:55,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-04-17 23:03:55,356 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-04-17 23:03:55,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:55,356 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-04-17 23:03:55,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:55,356 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-04-17 23:03:55,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:55,356 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:55,356 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:55,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:55,557 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:55,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:55,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-04-17 23:03:55,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:55,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972875989] [2020-04-17 23:03:55,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:55,716 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 23:03:55,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972875989] [2020-04-17 23:03:55,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739612980] [2020-04-17 23:03:55,717 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 23:03:55,769 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:03:55,769 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:55,771 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:55,772 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:55,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:55,796 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 23:03:55,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:55,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:03:55,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023814959] [2020-04-17 23:03:55,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:03:55,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:55,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:03:55,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:03:55,798 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-04-17 23:03:56,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:56,453 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-04-17 23:03:56,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 23:03:56,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:03:56,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:56,454 INFO L225 Difference]: With dead ends: 112 [2020-04-17 23:03:56,454 INFO L226 Difference]: Without dead ends: 106 [2020-04-17 23:03:56,455 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 23:03:56,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-04-17 23:03:56,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-04-17 23:03:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 23:03:56,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-04-17 23:03:56,457 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-04-17 23:03:56,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:56,457 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-04-17 23:03:56,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:03:56,457 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-04-17 23:03:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:56,458 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:56,458 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:56,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:56,658 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:56,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:56,659 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-04-17 23:03:56,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:56,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076203503] [2020-04-17 23:03:56,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:56,793 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 23:03:56,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076203503] [2020-04-17 23:03:56,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462782857] [2020-04-17 23:03:56,794 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 23:03:56,849 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 23:03:56,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:56,850 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:56,851 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:56,861 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 23:03:56,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:56,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 23:03:56,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302492594] [2020-04-17 23:03:56,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:56,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:56,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:56,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:56,863 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-04-17 23:03:57,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:57,420 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-04-17 23:03:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:03:57,421 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 23:03:57,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:57,422 INFO L225 Difference]: With dead ends: 113 [2020-04-17 23:03:57,422 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 23:03:57,422 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 23:03:57,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 23:03:57,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-04-17 23:03:57,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:03:57,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-04-17 23:03:57,425 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-04-17 23:03:57,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:57,425 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-04-17 23:03:57,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:57,425 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-04-17 23:03:57,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:57,425 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:57,425 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:57,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:57,626 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:57,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:57,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-04-17 23:03:57,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:57,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361931570] [2020-04-17 23:03:57,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:57,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:57,773 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 23:03:57,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361931570] [2020-04-17 23:03:57,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494041648] [2020-04-17 23:03:57,773 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 23:03:57,824 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:03:57,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:57,826 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:57,826 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:57,845 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:03:57,861 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 23:03:57,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:57,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:03:57,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204497532] [2020-04-17 23:03:57,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:03:57,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:57,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:03:57,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:03:57,863 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-04-17 23:03:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:58,581 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-04-17 23:03:58,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:03:58,581 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:03:58,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:58,582 INFO L225 Difference]: With dead ends: 110 [2020-04-17 23:03:58,582 INFO L226 Difference]: Without dead ends: 104 [2020-04-17 23:03:58,583 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 23:03:58,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-17 23:03:58,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-04-17 23:03:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:03:58,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-04-17 23:03:58,585 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-04-17 23:03:58,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:58,585 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-04-17 23:03:58,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:03:58,585 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-04-17 23:03:58,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:58,586 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:58,586 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:58,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:58,787 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:58,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:58,787 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-04-17 23:03:58,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:58,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441683319] [2020-04-17 23:03:58,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:03:58,918 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 23:03:58,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441683319] [2020-04-17 23:03:58,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812028186] [2020-04-17 23:03:58,919 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 23:03:58,968 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 23:03:58,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:03:58,969 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:03:58,969 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:03:59,004 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 23:03:59,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:03:59,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 23:03:59,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270742234] [2020-04-17 23:03:59,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:03:59,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:03:59,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:03:59,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:03:59,006 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-04-17 23:03:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:03:59,691 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-04-17 23:03:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 23:03:59,692 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 23:03:59,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:03:59,692 INFO L225 Difference]: With dead ends: 111 [2020-04-17 23:03:59,692 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 23:03:59,693 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-04-17 23:03:59,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 23:03:59,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-04-17 23:03:59,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 23:03:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-04-17 23:03:59,695 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-04-17 23:03:59,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:03:59,695 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-04-17 23:03:59,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:03:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-04-17 23:03:59,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:03:59,696 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:03:59,696 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:03:59,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:03:59,897 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:03:59,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:03:59,897 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-04-17 23:03:59,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:03:59,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055753599] [2020-04-17 23:03:59,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:03:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:00,026 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 23:04:00,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055753599] [2020-04-17 23:04:00,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463999001] [2020-04-17 23:04:00,027 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 23:04:00,081 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 23:04:00,082 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:00,083 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:04:00,083 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:00,099 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:00,121 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 23:04:00,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:00,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:04:00,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739029732] [2020-04-17 23:04:00,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:00,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:00,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:00,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:00,123 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-04-17 23:04:00,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:00,838 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-04-17 23:04:00,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 23:04:00,839 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:04:00,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:00,839 INFO L225 Difference]: With dead ends: 108 [2020-04-17 23:04:00,840 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 23:04:00,840 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 23:04:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 23:04:00,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-04-17 23:04:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 23:04:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-04-17 23:04:00,842 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-04-17 23:04:00,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:00,843 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-04-17 23:04:00,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:00,843 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-04-17 23:04:00,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:04:00,843 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:00,843 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:01,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:01,044 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:01,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:01,045 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-04-17 23:04:01,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:01,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396833738] [2020-04-17 23:04:01,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:01,185 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 23:04:01,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396833738] [2020-04-17 23:04:01,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145720918] [2020-04-17 23:04:01,185 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 23:04:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:01,233 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-04-17 23:04:01,234 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:01,246 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 23:04:01,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:01,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-04-17 23:04:01,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034692293] [2020-04-17 23:04:01,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-17 23:04:01,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:01,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-17 23:04:01,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-04-17 23:04:01,247 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-04-17 23:04:01,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:01,862 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-04-17 23:04:01,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 23:04:01,863 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-04-17 23:04:01,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:01,864 INFO L225 Difference]: With dead ends: 128 [2020-04-17 23:04:01,864 INFO L226 Difference]: Without dead ends: 122 [2020-04-17 23:04:01,864 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 23:04:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-17 23:04:01,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-04-17 23:04:01,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 23:04:01,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-04-17 23:04:01,866 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-04-17 23:04:01,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:01,866 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-04-17 23:04:01,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-17 23:04:01,866 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-04-17 23:04:01,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 23:04:01,866 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:01,866 INFO L425 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:02,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:02,067 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:02,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:02,068 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-04-17 23:04:02,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:02,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217943850] [2020-04-17 23:04:02,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:02,202 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 23:04:02,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217943850] [2020-04-17 23:04:02,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972438978] [2020-04-17 23:04:02,203 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 23:04:02,248 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:02,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:02,249 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:02,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:02,275 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 23:04:02,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:02,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-04-17 23:04:02,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951700499] [2020-04-17 23:04:02,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:02,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:02,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:02,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:02,276 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-04-17 23:04:03,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:03,012 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-04-17 23:04:03,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 23:04:03,013 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-04-17 23:04:03,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:03,014 INFO L225 Difference]: With dead ends: 109 [2020-04-17 23:04:03,014 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 23:04:03,014 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 23:04:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 23:04:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-04-17 23:04:03,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 23:04:03,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-04-17 23:04:03,016 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-04-17 23:04:03,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:03,016 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-04-17 23:04:03,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-04-17 23:04:03,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:03,017 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:03,017 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:03,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:03,218 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:03,218 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-04-17 23:04:03,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:03,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936871862] [2020-04-17 23:04:03,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:03,401 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 23:04:03,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936871862] [2020-04-17 23:04:03,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079391466] [2020-04-17 23:04:03,402 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 23:04:03,457 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 23:04:03,457 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:03,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:03,459 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:03,466 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 23:04:03,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:03,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 23:04:03,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744352637] [2020-04-17 23:04:03,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:03,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:03,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:03,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:03,468 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-04-17 23:04:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:03,824 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-04-17 23:04:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:04:03,825 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 23:04:03,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:03,825 INFO L225 Difference]: With dead ends: 124 [2020-04-17 23:04:03,826 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 23:04:03,826 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-04-17 23:04:03,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 23:04:03,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-04-17 23:04:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:04:03,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 23:04:03,828 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 23:04:03,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:03,829 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 23:04:03,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 23:04:03,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:03,829 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:03,830 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:04,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:04,032 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:04,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-04-17 23:04:04,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:04,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156206989] [2020-04-17 23:04:04,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:04,214 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 23:04:04,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156206989] [2020-04-17 23:04:04,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598499541] [2020-04-17 23:04:04,215 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 23:04:04,263 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:04,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:04,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:04,264 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:04,303 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:04,311 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 23:04:04,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:04,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:04,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551923806] [2020-04-17 23:04:04,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:04,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:04,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:04,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:04,313 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 23:04:04,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:04,737 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-04-17 23:04:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:04:04,738 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:04,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:04,739 INFO L225 Difference]: With dead ends: 121 [2020-04-17 23:04:04,739 INFO L226 Difference]: Without dead ends: 115 [2020-04-17 23:04:04,739 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 23:04:04,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-04-17 23:04:04,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-04-17 23:04:04,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:04:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 23:04:04,741 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 23:04:04,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:04,742 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 23:04:04,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:04,742 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 23:04:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:04,742 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:04,742 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:04,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:04,943 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:04,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:04,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-04-17 23:04:04,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:04,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311354208] [2020-04-17 23:04:04,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:05,115 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 23:04:05,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311354208] [2020-04-17 23:04:05,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505412146] [2020-04-17 23:04:05,116 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 23:04:05,171 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 23:04:05,172 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:05,173 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:05,174 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:05,181 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 23:04:05,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:05,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 23:04:05,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794051805] [2020-04-17 23:04:05,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:05,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:05,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:05,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:05,182 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 23:04:05,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:05,583 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-04-17 23:04:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:04:05,583 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 23:04:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:05,584 INFO L225 Difference]: With dead ends: 118 [2020-04-17 23:04:05,584 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 23:04:05,584 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 23:04:05,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 23:04:05,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-04-17 23:04:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:04:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 23:04:05,587 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 23:04:05,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:05,587 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 23:04:05,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:05,587 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 23:04:05,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:05,588 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:05,588 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:05,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:05,788 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:05,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:05,789 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-04-17 23:04:05,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:05,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013201655] [2020-04-17 23:04:05,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:05,967 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 23:04:05,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013201655] [2020-04-17 23:04:05,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904156353] [2020-04-17 23:04:05,967 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 23:04:06,019 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 23:04:06,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:06,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:06,021 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:06,035 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:06,043 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 23:04:06,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:06,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:06,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474125975] [2020-04-17 23:04:06,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:06,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:06,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:06,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:06,044 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 23:04:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:06,528 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-04-17 23:04:06,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:04:06,528 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:06,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:06,529 INFO L225 Difference]: With dead ends: 117 [2020-04-17 23:04:06,529 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 23:04:06,529 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 23:04:06,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 23:04:06,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-04-17 23:04:06,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:04:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 23:04:06,531 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 23:04:06,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:06,532 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 23:04:06,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:06,532 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 23:04:06,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:06,532 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:06,532 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:06,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:06,733 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:06,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:06,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-04-17 23:04:06,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:06,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815983459] [2020-04-17 23:04:06,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:06,907 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 23:04:06,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815983459] [2020-04-17 23:04:06,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944215266] [2020-04-17 23:04:06,908 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 23:04:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:06,964 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:06,965 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:06,973 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 23:04:06,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:06,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 23:04:06,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276869246] [2020-04-17 23:04:06,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:06,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:06,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:06,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:06,974 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 23:04:07,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:07,431 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-04-17 23:04:07,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:04:07,432 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 23:04:07,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:07,433 INFO L225 Difference]: With dead ends: 114 [2020-04-17 23:04:07,433 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 23:04:07,433 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 23:04:07,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 23:04:07,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-04-17 23:04:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:04:07,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 23:04:07,436 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 23:04:07,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:07,436 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 23:04:07,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:07,436 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 23:04:07,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:07,436 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:07,436 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:07,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:07,640 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:07,641 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-04-17 23:04:07,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:07,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920272174] [2020-04-17 23:04:07,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:07,816 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 23:04:07,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920272174] [2020-04-17 23:04:07,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649963601] [2020-04-17 23:04:07,817 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 23:04:07,866 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:07,867 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:07,868 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:07,869 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:07,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:07,891 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 23:04:07,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:07,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:07,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402691996] [2020-04-17 23:04:07,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:07,892 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:07,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:07,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:07,892 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 23:04:08,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:08,481 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-04-17 23:04:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:04:08,481 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:08,482 INFO L225 Difference]: With dead ends: 113 [2020-04-17 23:04:08,482 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 23:04:08,482 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 23:04:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 23:04:08,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-04-17 23:04:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:04:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 23:04:08,484 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 23:04:08,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:08,485 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 23:04:08,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:08,485 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 23:04:08,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:08,485 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:08,485 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:08,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:08,689 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:08,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:08,689 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-04-17 23:04:08,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:08,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924427977] [2020-04-17 23:04:08,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:08,854 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 23:04:08,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924427977] [2020-04-17 23:04:08,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222155656] [2020-04-17 23:04:08,855 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 23:04:08,909 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 23:04:08,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:08,911 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:08,912 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:08,929 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 23:04:08,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:08,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 23:04:08,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398658549] [2020-04-17 23:04:08,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:08,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:08,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:08,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:08,931 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 23:04:09,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:09,400 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-04-17 23:04:09,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:04:09,401 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 23:04:09,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:09,401 INFO L225 Difference]: With dead ends: 110 [2020-04-17 23:04:09,402 INFO L226 Difference]: Without dead ends: 104 [2020-04-17 23:04:09,402 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-04-17 23:04:09,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-04-17 23:04:09,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-04-17 23:04:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:04:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 23:04:09,405 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 23:04:09,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:09,405 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 23:04:09,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:09,405 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 23:04:09,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:09,406 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:09,406 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:09,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:09,606 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:09,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:09,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-04-17 23:04:09,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:09,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397479196] [2020-04-17 23:04:09,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:09,768 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 23:04:09,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397479196] [2020-04-17 23:04:09,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320937892] [2020-04-17 23:04:09,769 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 23:04:09,818 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:09,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:09,819 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:09,819 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:09,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:09,863 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 23:04:09,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:09,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:09,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406217498] [2020-04-17 23:04:09,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:09,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:09,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:09,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:09,864 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 23:04:10,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:10,484 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-04-17 23:04:10,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 23:04:10,484 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:10,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:10,485 INFO L225 Difference]: With dead ends: 109 [2020-04-17 23:04:10,485 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 23:04:10,485 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 23:04:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 23:04:10,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-04-17 23:04:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:04:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 23:04:10,487 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 23:04:10,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:10,488 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 23:04:10,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:10,488 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 23:04:10,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:10,488 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:10,488 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:10,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:10,689 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:10,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:10,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-04-17 23:04:10,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:10,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71901809] [2020-04-17 23:04:10,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:10,841 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 23:04:10,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71901809] [2020-04-17 23:04:10,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420331298] [2020-04-17 23:04:10,842 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 23:04:10,894 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 23:04:10,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:10,895 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:10,896 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:10,905 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 23:04:10,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:10,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 23:04:10,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462558468] [2020-04-17 23:04:10,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:10,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:10,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:10,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:10,906 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 23:04:11,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:11,424 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-04-17 23:04:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:04:11,424 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 23:04:11,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:11,425 INFO L225 Difference]: With dead ends: 106 [2020-04-17 23:04:11,425 INFO L226 Difference]: Without dead ends: 100 [2020-04-17 23:04:11,425 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 23:04:11,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-04-17 23:04:11,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-04-17 23:04:11,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:04:11,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 23:04:11,427 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 23:04:11,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:11,427 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 23:04:11,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:11,428 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 23:04:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:11,428 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:11,428 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:11,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:11,629 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:11,629 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-04-17 23:04:11,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:11,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580097611] [2020-04-17 23:04:11,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:11,778 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 23:04:11,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580097611] [2020-04-17 23:04:11,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224170785] [2020-04-17 23:04:11,778 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 23:04:11,830 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 23:04:11,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:11,832 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:11,833 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:11,861 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:11,870 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 23:04:11,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:11,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:11,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797355289] [2020-04-17 23:04:11,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:11,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:11,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:11,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:11,871 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 23:04:12,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:12,550 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-04-17 23:04:12,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:04:12,551 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:12,551 INFO L225 Difference]: With dead ends: 105 [2020-04-17 23:04:12,551 INFO L226 Difference]: Without dead ends: 99 [2020-04-17 23:04:12,552 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 23:04:12,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-04-17 23:04:12,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-04-17 23:04:12,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:04:12,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 23:04:12,554 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 23:04:12,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:12,554 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 23:04:12,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:12,554 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 23:04:12,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:12,555 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:12,555 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:12,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:12,756 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:12,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-04-17 23:04:12,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:12,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189358929] [2020-04-17 23:04:12,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:12,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:12,899 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 23:04:12,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189358929] [2020-04-17 23:04:12,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445743655] [2020-04-17 23:04:12,900 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 23:04:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:12,954 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:12,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:12,978 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 23:04:12,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:12,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 23:04:12,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387146832] [2020-04-17 23:04:12,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:12,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:12,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:12,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:12,980 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 23:04:13,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:13,544 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-04-17 23:04:13,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:04:13,545 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 23:04:13,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:13,545 INFO L225 Difference]: With dead ends: 102 [2020-04-17 23:04:13,545 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 23:04:13,546 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 23:04:13,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 23:04:13,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-04-17 23:04:13,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:04:13,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 23:04:13,548 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 23:04:13,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:13,548 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 23:04:13,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:13,548 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 23:04:13,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:13,549 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:13,549 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:13,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:13,750 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:13,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:13,751 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-04-17 23:04:13,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:13,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100179515] [2020-04-17 23:04:13,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:13,904 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 23:04:13,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100179515] [2020-04-17 23:04:13,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806213824] [2020-04-17 23:04:13,905 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 23:04:13,951 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:13,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:13,952 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:13,953 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:13,967 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:13,977 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 23:04:13,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:13,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:13,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821712741] [2020-04-17 23:04:13,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:13,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:13,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:13,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:13,978 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 23:04:14,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:14,730 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-04-17 23:04:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 23:04:14,730 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:14,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:14,731 INFO L225 Difference]: With dead ends: 101 [2020-04-17 23:04:14,731 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 23:04:14,732 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 23:04:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 23:04:14,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-04-17 23:04:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:04:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 23:04:14,734 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 23:04:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:14,734 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 23:04:14,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 23:04:14,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:14,735 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:14,735 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:14,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:14,936 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:14,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:14,936 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-04-17 23:04:14,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:14,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004728977] [2020-04-17 23:04:14,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:15,088 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 23:04:15,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004728977] [2020-04-17 23:04:15,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206436091] [2020-04-17 23:04:15,089 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 23:04:15,146 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-04-17 23:04:15,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:15,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:15,148 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:15,159 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 23:04:15,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:15,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 23:04:15,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350513314] [2020-04-17 23:04:15,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:15,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:15,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:15,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:15,161 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 23:04:15,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:15,791 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-04-17 23:04:15,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 23:04:15,791 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 23:04:15,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:15,792 INFO L225 Difference]: With dead ends: 98 [2020-04-17 23:04:15,792 INFO L226 Difference]: Without dead ends: 92 [2020-04-17 23:04:15,793 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 23:04:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-04-17 23:04:15,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-04-17 23:04:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:04:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 23:04:15,795 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-04-17 23:04:15,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:15,795 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 23:04:15,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:15,795 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 23:04:15,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:15,796 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:15,796 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:15,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:15,997 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:15,997 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-04-17 23:04:15,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:15,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184964134] [2020-04-17 23:04:15,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:16,146 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 23:04:16,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184964134] [2020-04-17 23:04:16,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528545612] [2020-04-17 23:04:16,147 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 23:04:16,198 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:16,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:16,199 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:16,207 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:16,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:16,234 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 23:04:16,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:16,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:16,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199710341] [2020-04-17 23:04:16,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:16,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:16,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:16,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:16,236 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-04-17 23:04:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:17,116 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-04-17 23:04:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 23:04:17,116 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:17,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:17,117 INFO L225 Difference]: With dead ends: 97 [2020-04-17 23:04:17,117 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 23:04:17,117 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-04-17 23:04:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 23:04:17,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-04-17 23:04:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:04:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 23:04:17,120 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-04-17 23:04:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:17,120 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 23:04:17,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 23:04:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:17,120 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:17,120 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:17,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:17,321 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:17,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:17,322 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-04-17 23:04:17,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:17,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807044063] [2020-04-17 23:04:17,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:17,464 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 23:04:17,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807044063] [2020-04-17 23:04:17,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092320820] [2020-04-17 23:04:17,464 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 23:04:17,524 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-04-17 23:04:17,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:17,525 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:17,526 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:17,545 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 23:04:17,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:17,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-04-17 23:04:17,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333214779] [2020-04-17 23:04:17,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 23:04:17,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:17,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 23:04:17,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-04-17 23:04:17,547 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-04-17 23:04:18,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:18,220 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-04-17 23:04:18,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 23:04:18,221 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-04-17 23:04:18,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:18,221 INFO L225 Difference]: With dead ends: 113 [2020-04-17 23:04:18,222 INFO L226 Difference]: Without dead ends: 107 [2020-04-17 23:04:18,222 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 23:04:18,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-04-17 23:04:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-04-17 23:04:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-04-17 23:04:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-04-17 23:04:18,225 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-04-17 23:04:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:18,225 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-04-17 23:04:18,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 23:04:18,225 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-04-17 23:04:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:18,226 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:18,226 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:18,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:18,427 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:18,427 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-04-17 23:04:18,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:18,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104412314] [2020-04-17 23:04:18,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:18,565 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 23:04:18,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104412314] [2020-04-17 23:04:18,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690635832] [2020-04-17 23:04:18,566 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 23:04:18,621 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-04-17 23:04:18,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:18,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:18,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:18,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:18,696 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 23:04:18,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:18,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:18,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952347388] [2020-04-17 23:04:18,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:18,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:18,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:18,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:18,698 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-04-17 23:04:19,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:19,583 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-04-17 23:04:19,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 23:04:19,584 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:19,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:19,584 INFO L225 Difference]: With dead ends: 94 [2020-04-17 23:04:19,584 INFO L226 Difference]: Without dead ends: 86 [2020-04-17 23:04:19,585 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 23:04:19,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-04-17 23:04:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-04-17 23:04:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-04-17 23:04:19,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-04-17 23:04:19,587 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-04-17 23:04:19,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:19,587 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-04-17 23:04:19,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:19,587 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-04-17 23:04:19,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-04-17 23:04:19,587 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:19,587 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:19,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:19,788 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:19,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:19,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-04-17 23:04:19,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:19,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878096587] [2020-04-17 23:04:19,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:19,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:19,948 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 23:04:19,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878096587] [2020-04-17 23:04:19,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717567969] [2020-04-17 23:04:19,949 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 23:04:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:20,003 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-17 23:04:20,004 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:20,018 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:20,030 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 23:04:20,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:20,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-04-17 23:04:20,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873450708] [2020-04-17 23:04:20,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:20,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:20,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:20,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:20,032 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-04-17 23:04:20,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:20,834 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-04-17 23:04:20,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 23:04:20,834 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-04-17 23:04:20,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:20,835 INFO L225 Difference]: With dead ends: 108 [2020-04-17 23:04:20,835 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 23:04:20,835 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-04-17 23:04:20,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 23:04:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-04-17 23:04:20,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 23:04:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-04-17 23:04:20,838 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-04-17 23:04:20,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:20,838 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-04-17 23:04:20,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-04-17 23:04:20,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:20,838 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:20,838 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:21,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:21,039 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:21,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:21,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-04-17 23:04:21,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:21,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124412724] [2020-04-17 23:04:21,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:21,208 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 23:04:21,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124412724] [2020-04-17 23:04:21,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164630359] [2020-04-17 23:04:21,209 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 23:04:21,255 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:21,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:21,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:21,257 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:21,279 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:21,291 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 23:04:21,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:21,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:21,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209760884] [2020-04-17 23:04:21,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:21,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:21,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:21,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:21,292 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-04-17 23:04:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:22,123 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-04-17 23:04:22,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 23:04:22,123 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:22,124 INFO L225 Difference]: With dead ends: 90 [2020-04-17 23:04:22,124 INFO L226 Difference]: Without dead ends: 85 [2020-04-17 23:04:22,124 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 23:04:22,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-04-17 23:04:22,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-04-17 23:04:22,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-04-17 23:04:22,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-04-17 23:04:22,126 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-04-17 23:04:22,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:22,127 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-04-17 23:04:22,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:22,127 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-04-17 23:04:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:22,127 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:22,127 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:22,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:22,328 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:22,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:22,329 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-04-17 23:04:22,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:22,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798835908] [2020-04-17 23:04:22,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:22,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:22,526 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 23:04:22,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798835908] [2020-04-17 23:04:22,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196698805] [2020-04-17 23:04:22,527 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 23:04:22,586 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 23:04:22,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:22,588 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:22,588 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:22,594 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 23:04:22,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:22,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:22,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284608349] [2020-04-17 23:04:22,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:22,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:22,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:22,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:22,595 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-04-17 23:04:22,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:22,963 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-04-17 23:04:22,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-04-17 23:04:22,964 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:22,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:22,964 INFO L225 Difference]: With dead ends: 96 [2020-04-17 23:04:22,964 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 23:04:22,965 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 23:04:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 23:04:22,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-04-17 23:04:22,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 23:04:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-04-17 23:04:22,967 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-04-17 23:04:22,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:22,967 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-04-17 23:04:22,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:22,967 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-04-17 23:04:22,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:22,968 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:22,968 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:23,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:23,169 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:23,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:23,169 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-04-17 23:04:23,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:23,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756392525] [2020-04-17 23:04:23,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:23,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:23,371 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 23:04:23,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756392525] [2020-04-17 23:04:23,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163274366] [2020-04-17 23:04:23,372 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:23,421 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:23,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:23,422 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:23,422 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:23,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:23,443 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 23:04:23,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:23,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:23,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962477788] [2020-04-17 23:04:23,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:23,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:23,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:23,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:23,444 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-04-17 23:04:23,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:23,859 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-04-17 23:04:23,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-17 23:04:23,860 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:23,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:23,861 INFO L225 Difference]: With dead ends: 114 [2020-04-17 23:04:23,861 INFO L226 Difference]: Without dead ends: 108 [2020-04-17 23:04:23,861 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 23:04:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-04-17 23:04:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-04-17 23:04:23,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-04-17 23:04:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-04-17 23:04:23,863 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-04-17 23:04:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:23,863 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-04-17 23:04:23,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-04-17 23:04:23,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:23,864 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:23,864 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:24,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:24,065 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:24,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:24,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-04-17 23:04:24,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:24,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943370741] [2020-04-17 23:04:24,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:24,262 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 23:04:24,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943370741] [2020-04-17 23:04:24,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357023583] [2020-04-17 23:04:24,263 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 23:04:24,316 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 23:04:24,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:24,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:24,318 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:24,325 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 23:04:24,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:24,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:24,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650178304] [2020-04-17 23:04:24,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:24,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:24,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:24,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:24,326 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-04-17 23:04:24,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:24,766 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-04-17 23:04:24,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:04:24,766 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:24,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:24,767 INFO L225 Difference]: With dead ends: 115 [2020-04-17 23:04:24,767 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 23:04:24,767 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 23:04:24,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 23:04:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-04-17 23:04:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-04-17 23:04:24,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-04-17 23:04:24,770 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-04-17 23:04:24,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:24,770 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-04-17 23:04:24,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:24,770 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-04-17 23:04:24,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:24,770 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:24,771 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:24,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:24,971 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:24,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:24,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-04-17 23:04:24,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:24,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095038635] [2020-04-17 23:04:24,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:25,173 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 23:04:25,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095038635] [2020-04-17 23:04:25,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483140992] [2020-04-17 23:04:25,174 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 23:04:25,228 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 23:04:25,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:25,230 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:25,230 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:25,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:25,254 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 23:04:25,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:25,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:25,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560855621] [2020-04-17 23:04:25,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:25,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:25,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:25,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:25,256 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-04-17 23:04:25,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:25,708 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-04-17 23:04:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:04:25,709 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:25,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:25,709 INFO L225 Difference]: With dead ends: 129 [2020-04-17 23:04:25,709 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 23:04:25,710 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 23:04:25,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 23:04:25,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-04-17 23:04:25,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-04-17 23:04:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-04-17 23:04:25,713 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-04-17 23:04:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:25,713 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-04-17 23:04:25,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-04-17 23:04:25,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:25,714 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:25,714 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:25,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:25,917 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:25,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:25,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-04-17 23:04:25,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:25,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639818121] [2020-04-17 23:04:25,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:26,118 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 23:04:26,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639818121] [2020-04-17 23:04:26,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329690196] [2020-04-17 23:04:26,119 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 23:04:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:26,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:26,171 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:26,181 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 23:04:26,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:26,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:26,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490498194] [2020-04-17 23:04:26,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:26,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:26,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:26,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:26,183 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-04-17 23:04:26,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:26,699 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-04-17 23:04:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:04:26,699 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:26,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:26,700 INFO L225 Difference]: With dead ends: 129 [2020-04-17 23:04:26,700 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 23:04:26,700 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-04-17 23:04:26,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 23:04:26,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-04-17 23:04:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-04-17 23:04:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-04-17 23:04:26,703 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-04-17 23:04:26,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:26,703 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-04-17 23:04:26,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:26,703 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-04-17 23:04:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:26,704 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:26,704 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:26,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:26,905 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:26,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:26,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-04-17 23:04:26,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:26,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685024882] [2020-04-17 23:04:26,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:27,103 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 23:04:27,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685024882] [2020-04-17 23:04:27,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270646185] [2020-04-17 23:04:27,104 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 23:04:27,151 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:27,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:27,152 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:27,152 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:27,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:27,176 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 23:04:27,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:27,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:27,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766274978] [2020-04-17 23:04:27,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:27,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:27,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:27,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:27,177 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-04-17 23:04:27,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:27,719 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-04-17 23:04:27,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:04:27,719 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:27,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:27,720 INFO L225 Difference]: With dead ends: 126 [2020-04-17 23:04:27,720 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 23:04:27,721 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 23:04:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 23:04:27,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-04-17 23:04:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 23:04:27,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-04-17 23:04:27,723 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-04-17 23:04:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:27,724 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-04-17 23:04:27,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:27,724 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-04-17 23:04:27,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:27,724 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:27,724 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:27,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:27,927 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:27,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:27,928 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-04-17 23:04:27,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:27,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575554873] [2020-04-17 23:04:27,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:28,113 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 23:04:28,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575554873] [2020-04-17 23:04:28,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194566539] [2020-04-17 23:04:28,114 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:28,166 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 23:04:28,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:28,167 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:28,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:28,178 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 23:04:28,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:28,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:28,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878089526] [2020-04-17 23:04:28,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:28,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:28,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:28,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:28,180 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-04-17 23:04:28,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:28,746 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-04-17 23:04:28,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:04:28,747 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:28,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:28,748 INFO L225 Difference]: With dead ends: 127 [2020-04-17 23:04:28,748 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 23:04:28,748 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 23:04:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 23:04:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-04-17 23:04:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:04:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-04-17 23:04:28,751 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-04-17 23:04:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:28,751 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-04-17 23:04:28,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:28,751 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-04-17 23:04:28,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:28,752 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:28,752 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:28,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:28,953 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:28,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-04-17 23:04:28,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:28,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974522783] [2020-04-17 23:04:28,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:29,141 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 23:04:29,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974522783] [2020-04-17 23:04:29,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076804056] [2020-04-17 23:04:29,141 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 23:04:29,193 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:29,193 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:29,194 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:29,194 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:29,209 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:29,218 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 23:04:29,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:29,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:29,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588351693] [2020-04-17 23:04:29,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:29,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:29,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:29,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:29,224 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-04-17 23:04:29,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:29,857 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-04-17 23:04:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 23:04:29,858 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:29,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:29,858 INFO L225 Difference]: With dead ends: 124 [2020-04-17 23:04:29,858 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 23:04:29,859 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 23:04:29,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 23:04:29,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-04-17 23:04:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:04:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-04-17 23:04:29,861 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-04-17 23:04:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:29,861 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-04-17 23:04:29,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-04-17 23:04:29,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:29,862 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:29,862 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:30,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:30,062 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:30,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-04-17 23:04:30,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:30,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976561874] [2020-04-17 23:04:30,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:30,250 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 23:04:30,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976561874] [2020-04-17 23:04:30,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762631646] [2020-04-17 23:04:30,251 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 23:04:30,308 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 23:04:30,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:30,309 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:30,310 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:30,362 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 23:04:30,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:30,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:30,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938276204] [2020-04-17 23:04:30,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:30,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:30,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:30,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:30,364 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-04-17 23:04:30,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:30,940 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-04-17 23:04:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:04:30,940 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:30,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:30,941 INFO L225 Difference]: With dead ends: 125 [2020-04-17 23:04:30,941 INFO L226 Difference]: Without dead ends: 119 [2020-04-17 23:04:30,942 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 23:04:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-04-17 23:04:30,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-04-17 23:04:30,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 23:04:30,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-04-17 23:04:30,944 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-04-17 23:04:30,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:30,944 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-04-17 23:04:30,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:30,944 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-04-17 23:04:30,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:30,945 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:30,945 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:31,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:31,145 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:31,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:31,146 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-04-17 23:04:31,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:31,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19189627] [2020-04-17 23:04:31,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:31,315 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 23:04:31,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19189627] [2020-04-17 23:04:31,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886066088] [2020-04-17 23:04:31,316 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 23:04:31,372 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 23:04:31,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:31,373 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:31,374 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:31,389 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:31,400 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 23:04:31,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:31,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:31,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104928245] [2020-04-17 23:04:31,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:31,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:31,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:31,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:31,401 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-04-17 23:04:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:32,103 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-04-17 23:04:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:04:32,103 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:32,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:32,104 INFO L225 Difference]: With dead ends: 122 [2020-04-17 23:04:32,104 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 23:04:32,105 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 23:04:32,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 23:04:32,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-04-17 23:04:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 23:04:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-04-17 23:04:32,107 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-04-17 23:04:32,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:32,107 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-04-17 23:04:32,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-04-17 23:04:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:32,107 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:32,108 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:32,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:32,308 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:32,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:32,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-04-17 23:04:32,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:32,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784151283] [2020-04-17 23:04:32,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:32,478 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 23:04:32,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784151283] [2020-04-17 23:04:32,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038277821] [2020-04-17 23:04:32,479 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 23:04:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:32,530 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:32,530 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:32,540 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 23:04:32,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:32,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:32,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800065219] [2020-04-17 23:04:32,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:32,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:32,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:32,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:32,542 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-04-17 23:04:33,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:33,148 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-04-17 23:04:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 23:04:33,148 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:33,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:33,149 INFO L225 Difference]: With dead ends: 123 [2020-04-17 23:04:33,149 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 23:04:33,150 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 23:04:33,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 23:04:33,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-04-17 23:04:33,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 23:04:33,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-04-17 23:04:33,152 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-04-17 23:04:33,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:33,153 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-04-17 23:04:33,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:33,153 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-04-17 23:04:33,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:33,153 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:33,153 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:33,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:33,354 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:33,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:33,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-04-17 23:04:33,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:33,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496495243] [2020-04-17 23:04:33,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:33,520 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 23:04:33,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496495243] [2020-04-17 23:04:33,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225775860] [2020-04-17 23:04:33,521 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 23:04:33,570 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:33,571 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:33,572 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:33,573 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:33,590 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:33,599 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 23:04:33,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:33,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:33,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841221232] [2020-04-17 23:04:33,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:33,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:33,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:33,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:33,600 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-04-17 23:04:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:34,360 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-04-17 23:04:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 23:04:34,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:34,361 INFO L225 Difference]: With dead ends: 120 [2020-04-17 23:04:34,361 INFO L226 Difference]: Without dead ends: 114 [2020-04-17 23:04:34,362 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 23:04:34,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-17 23:04:34,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-04-17 23:04:34,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 23:04:34,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-04-17 23:04:34,364 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-04-17 23:04:34,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:34,364 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-04-17 23:04:34,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:34,365 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-04-17 23:04:34,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:34,365 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:34,365 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:34,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:34,566 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:34,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:34,566 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-04-17 23:04:34,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:34,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669400855] [2020-04-17 23:04:34,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:34,725 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 23:04:34,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669400855] [2020-04-17 23:04:34,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099916936] [2020-04-17 23:04:34,726 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 23:04:34,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 23:04:34,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:34,785 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:34,786 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:34,798 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 23:04:34,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:34,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:34,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355265088] [2020-04-17 23:04:34,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:34,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:34,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:34,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:34,800 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-04-17 23:04:35,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:35,440 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-04-17 23:04:35,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 23:04:35,441 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:35,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:35,441 INFO L225 Difference]: With dead ends: 121 [2020-04-17 23:04:35,442 INFO L226 Difference]: Without dead ends: 115 [2020-04-17 23:04:35,442 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 23:04:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-04-17 23:04:35,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-04-17 23:04:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:04:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-04-17 23:04:35,445 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-04-17 23:04:35,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:35,445 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-04-17 23:04:35,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-04-17 23:04:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:35,445 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:35,445 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:35,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:35,646 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:35,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:35,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-04-17 23:04:35,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:35,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127218593] [2020-04-17 23:04:35,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:35,807 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 23:04:35,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127218593] [2020-04-17 23:04:35,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768803820] [2020-04-17 23:04:35,808 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 23:04:35,861 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:35,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:35,862 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:35,862 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:35,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:35,889 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 23:04:35,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:35,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:35,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643572888] [2020-04-17 23:04:35,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:35,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:35,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:35,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:35,890 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-04-17 23:04:36,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:36,673 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-04-17 23:04:36,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 23:04:36,674 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:36,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:36,674 INFO L225 Difference]: With dead ends: 118 [2020-04-17 23:04:36,675 INFO L226 Difference]: Without dead ends: 112 [2020-04-17 23:04:36,675 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 23:04:36,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-04-17 23:04:36,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-04-17 23:04:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:04:36,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-04-17 23:04:36,677 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-04-17 23:04:36,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:36,678 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-04-17 23:04:36,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:36,678 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-04-17 23:04:36,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:36,678 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:36,678 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:36,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:36,879 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:36,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:36,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-04-17 23:04:36,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:36,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704473045] [2020-04-17 23:04:36,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:37,045 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 23:04:37,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704473045] [2020-04-17 23:04:37,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679543757] [2020-04-17 23:04:37,046 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 23:04:37,100 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 23:04:37,100 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:37,101 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:37,102 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:37,117 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 23:04:37,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:37,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:37,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563564864] [2020-04-17 23:04:37,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:37,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:37,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:37,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:37,118 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-04-17 23:04:37,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:37,829 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-04-17 23:04:37,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 23:04:37,829 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:37,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:37,830 INFO L225 Difference]: With dead ends: 119 [2020-04-17 23:04:37,830 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 23:04:37,831 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 23:04:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 23:04:37,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-04-17 23:04:37,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 23:04:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-04-17 23:04:37,833 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-04-17 23:04:37,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:37,834 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-04-17 23:04:37,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:37,834 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-04-17 23:04:37,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:37,834 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:37,834 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:38,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:38,035 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:38,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:38,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-04-17 23:04:38,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:38,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163475340] [2020-04-17 23:04:38,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:38,190 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 23:04:38,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163475340] [2020-04-17 23:04:38,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899646207] [2020-04-17 23:04:38,191 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 23:04:38,247 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 23:04:38,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:38,248 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:38,249 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:38,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:38,275 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 23:04:38,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:38,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:38,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268346630] [2020-04-17 23:04:38,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:38,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:38,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:38,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:38,276 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-04-17 23:04:39,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:39,152 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-04-17 23:04:39,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 23:04:39,152 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:39,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:39,153 INFO L225 Difference]: With dead ends: 116 [2020-04-17 23:04:39,153 INFO L226 Difference]: Without dead ends: 110 [2020-04-17 23:04:39,153 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 23:04:39,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-17 23:04:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-04-17 23:04:39,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 23:04:39,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-04-17 23:04:39,156 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-04-17 23:04:39,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:39,156 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-04-17 23:04:39,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:39,156 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-04-17 23:04:39,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:39,156 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:39,156 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:39,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:39,357 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:39,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:39,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-04-17 23:04:39,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:39,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220415244] [2020-04-17 23:04:39,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:39,502 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 23:04:39,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220415244] [2020-04-17 23:04:39,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392763094] [2020-04-17 23:04:39,503 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 23:04:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:39,555 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:39,555 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:39,568 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 23:04:39,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:39,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-04-17 23:04:39,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636023522] [2020-04-17 23:04:39,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-04-17 23:04:39,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:39,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-04-17 23:04:39,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-04-17 23:04:39,569 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-04-17 23:04:40,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:40,283 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-04-17 23:04:40,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 23:04:40,283 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-04-17 23:04:40,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:40,284 INFO L225 Difference]: With dead ends: 136 [2020-04-17 23:04:40,284 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 23:04:40,285 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-04-17 23:04:40,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 23:04:40,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-04-17 23:04:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 23:04:40,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-04-17 23:04:40,288 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-04-17 23:04:40,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:40,288 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-04-17 23:04:40,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-04-17 23:04:40,288 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-04-17 23:04:40,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-04-17 23:04:40,288 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:40,289 INFO L425 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:40,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:40,492 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:40,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:40,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-04-17 23:04:40,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:40,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26643330] [2020-04-17 23:04:40,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:40,648 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 23:04:40,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26643330] [2020-04-17 23:04:40,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454688392] [2020-04-17 23:04:40,649 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 23:04:40,695 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:40,695 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:40,695 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-04-17 23:04:40,696 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:40,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:40,723 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 23:04:40,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:40,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-04-17 23:04:40,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729876414] [2020-04-17 23:04:40,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:40,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:40,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:40,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:40,724 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-04-17 23:04:41,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:41,642 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-04-17 23:04:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 23:04:41,642 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-04-17 23:04:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:41,643 INFO L225 Difference]: With dead ends: 117 [2020-04-17 23:04:41,643 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 23:04:41,643 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-04-17 23:04:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 23:04:41,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-04-17 23:04:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-04-17 23:04:41,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-04-17 23:04:41,646 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-04-17 23:04:41,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:41,646 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-04-17 23:04:41,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:41,646 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-04-17 23:04:41,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:41,647 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:41,647 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:41,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:41,848 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:41,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:41,848 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-04-17 23:04:41,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:41,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157590254] [2020-04-17 23:04:41,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:42,068 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 23:04:42,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157590254] [2020-04-17 23:04:42,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642683904] [2020-04-17 23:04:42,069 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 23:04:42,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 23:04:42,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:42,122 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:42,123 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:42,131 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 23:04:42,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:42,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:42,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928905690] [2020-04-17 23:04:42,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:42,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:42,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:42,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:42,132 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-04-17 23:04:42,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:42,561 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-04-17 23:04:42,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:04:42,561 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:42,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:42,562 INFO L225 Difference]: With dead ends: 134 [2020-04-17 23:04:42,562 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 23:04:42,562 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 23:04:42,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 23:04:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-04-17 23:04:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:04:42,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:04:42,565 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 23:04:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:42,565 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:04:42,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:04:42,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:42,566 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:42,566 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:42,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:42,767 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:42,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:42,767 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-04-17 23:04:42,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:42,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522980720] [2020-04-17 23:04:42,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:42,995 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 23:04:42,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522980720] [2020-04-17 23:04:42,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590955734] [2020-04-17 23:04:42,995 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 23:04:43,046 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:43,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:43,047 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:43,048 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:43,071 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:43,084 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 23:04:43,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:43,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:43,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020539051] [2020-04-17 23:04:43,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:43,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:43,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:43,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:43,088 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 23:04:43,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:43,599 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-04-17 23:04:43,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:04:43,599 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:43,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:43,600 INFO L225 Difference]: With dead ends: 131 [2020-04-17 23:04:43,600 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 23:04:43,601 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 23:04:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 23:04:43,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-04-17 23:04:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:04:43,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:04:43,603 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 23:04:43,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:43,603 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:04:43,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:43,603 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:04:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:43,603 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:43,603 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:43,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:43,804 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:43,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:43,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-04-17 23:04:43,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:43,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585744058] [2020-04-17 23:04:43,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:43,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:44,005 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 23:04:44,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585744058] [2020-04-17 23:04:44,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240365231] [2020-04-17 23:04:44,006 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 23:04:44,065 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 23:04:44,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:44,066 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:44,067 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:44,099 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 23:04:44,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:44,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:44,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796382587] [2020-04-17 23:04:44,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:44,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:44,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:44,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:44,100 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 23:04:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:44,577 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-04-17 23:04:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-17 23:04:44,578 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:44,578 INFO L225 Difference]: With dead ends: 128 [2020-04-17 23:04:44,578 INFO L226 Difference]: Without dead ends: 122 [2020-04-17 23:04:44,579 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 23:04:44,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-17 23:04:44,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-04-17 23:04:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:04:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:04:44,581 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 23:04:44,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:44,581 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:04:44,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:44,581 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:04:44,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:44,581 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:44,581 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:44,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:44,782 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:44,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:44,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-04-17 23:04:44,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:44,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463139684] [2020-04-17 23:04:44,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:44,990 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 23:04:44,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463139684] [2020-04-17 23:04:44,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180013047] [2020-04-17 23:04:44,991 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 23:04:45,044 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 23:04:45,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:45,045 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:45,046 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:45,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:45,069 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 23:04:45,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:45,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:45,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826341690] [2020-04-17 23:04:45,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:45,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:45,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:45,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:45,071 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 23:04:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:45,609 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-04-17 23:04:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:04:45,610 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:45,610 INFO L225 Difference]: With dead ends: 127 [2020-04-17 23:04:45,611 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 23:04:45,611 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-04-17 23:04:45,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 23:04:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-04-17 23:04:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:04:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:04:45,613 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 23:04:45,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:45,614 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:04:45,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:04:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:45,614 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:45,614 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:45,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:45,815 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:45,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:45,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-04-17 23:04:45,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:45,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858289964] [2020-04-17 23:04:45,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:46,004 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 23:04:46,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858289964] [2020-04-17 23:04:46,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778181994] [2020-04-17 23:04:46,005 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 23:04:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:46,055 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:46,055 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:46,088 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 23:04:46,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:46,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:46,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751905808] [2020-04-17 23:04:46,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:46,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:46,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:46,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:46,089 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 23:04:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:46,572 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-04-17 23:04:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:04:46,573 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:46,573 INFO L225 Difference]: With dead ends: 124 [2020-04-17 23:04:46,574 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 23:04:46,574 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 23:04:46,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 23:04:46,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-04-17 23:04:46,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:04:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:04:46,576 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 23:04:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:46,577 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:04:46,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:04:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:46,577 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:46,577 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:46,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:46,778 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:46,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:46,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-04-17 23:04:46,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:46,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797790146] [2020-04-17 23:04:46,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:46,985 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 23:04:46,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797790146] [2020-04-17 23:04:46,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261605918] [2020-04-17 23:04:46,986 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 23:04:47,041 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:47,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:47,042 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:47,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:47,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:47,066 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 23:04:47,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:47,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:47,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566626534] [2020-04-17 23:04:47,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:47,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:47,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:47,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:47,068 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 23:04:47,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:47,718 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-04-17 23:04:47,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 23:04:47,718 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:47,719 INFO L225 Difference]: With dead ends: 123 [2020-04-17 23:04:47,719 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 23:04:47,720 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 23:04:47,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 23:04:47,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-04-17 23:04:47,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:04:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:04:47,722 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 23:04:47,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:47,723 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:04:47,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:47,723 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:04:47,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:47,723 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:47,723 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:47,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:47,924 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:47,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:47,924 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-04-17 23:04:47,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:47,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341893515] [2020-04-17 23:04:47,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:48,137 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 23:04:48,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341893515] [2020-04-17 23:04:48,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424525107] [2020-04-17 23:04:48,138 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:48,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 23:04:48,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:48,203 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:48,204 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:48,221 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 23:04:48,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:48,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:48,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676623134] [2020-04-17 23:04:48,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:48,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:48,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:48,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:48,222 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 23:04:48,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:48,772 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-04-17 23:04:48,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:04:48,773 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:48,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:48,773 INFO L225 Difference]: With dead ends: 120 [2020-04-17 23:04:48,774 INFO L226 Difference]: Without dead ends: 114 [2020-04-17 23:04:48,774 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 23:04:48,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-04-17 23:04:48,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-04-17 23:04:48,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:04:48,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:04:48,777 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 23:04:48,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:48,777 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:04:48,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:48,777 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:04:48,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:48,777 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:48,777 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:48,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:48,978 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:48,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:48,979 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-04-17 23:04:48,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:48,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057279467] [2020-04-17 23:04:48,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:49,168 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 23:04:49,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057279467] [2020-04-17 23:04:49,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100856588] [2020-04-17 23:04:49,169 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 23:04:49,226 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:49,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:49,227 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:49,228 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:49,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:49,257 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 23:04:49,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:49,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:49,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138152081] [2020-04-17 23:04:49,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:49,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:49,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:49,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:49,258 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 23:04:49,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:49,974 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-04-17 23:04:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:04:49,975 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:49,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:49,976 INFO L225 Difference]: With dead ends: 119 [2020-04-17 23:04:49,976 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 23:04:49,977 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 23:04:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 23:04:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-04-17 23:04:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:04:49,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:04:49,980 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 23:04:49,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:49,980 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:04:49,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:49,980 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:04:49,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:49,981 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:49,981 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:50,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:50,184 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:50,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:50,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-04-17 23:04:50,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:50,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412642008] [2020-04-17 23:04:50,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:50,365 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 23:04:50,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412642008] [2020-04-17 23:04:50,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459673228] [2020-04-17 23:04:50,366 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 23:04:50,420 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 23:04:50,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:50,421 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:50,422 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:50,439 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 23:04:50,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:50,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:50,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534145953] [2020-04-17 23:04:50,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:50,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:50,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:50,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:50,443 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 23:04:51,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:51,038 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-04-17 23:04:51,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:04:51,038 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:51,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:51,039 INFO L225 Difference]: With dead ends: 116 [2020-04-17 23:04:51,039 INFO L226 Difference]: Without dead ends: 110 [2020-04-17 23:04:51,040 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-04-17 23:04:51,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-04-17 23:04:51,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-04-17 23:04:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:04:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:04:51,042 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 23:04:51,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:51,042 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:04:51,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:04:51,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:51,043 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:51,043 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:51,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:51,244 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:51,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:51,245 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-04-17 23:04:51,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:51,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502554566] [2020-04-17 23:04:51,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:51,439 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 23:04:51,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502554566] [2020-04-17 23:04:51,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844172995] [2020-04-17 23:04:51,440 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 23:04:51,500 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 23:04:51,500 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:51,501 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:51,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:51,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:51,527 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 23:04:51,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:51,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:51,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681432328] [2020-04-17 23:04:51,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:51,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:51,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:51,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:51,529 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 23:04:52,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:52,285 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-04-17 23:04:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 23:04:52,285 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:52,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:52,286 INFO L225 Difference]: With dead ends: 115 [2020-04-17 23:04:52,286 INFO L226 Difference]: Without dead ends: 109 [2020-04-17 23:04:52,287 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 23:04:52,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-04-17 23:04:52,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-04-17 23:04:52,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:04:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:04:52,289 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 23:04:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:52,290 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:04:52,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:52,290 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:04:52,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:52,290 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:52,290 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:52,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:52,494 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:52,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:52,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-04-17 23:04:52,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:52,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558726994] [2020-04-17 23:04:52,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:52,687 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 23:04:52,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558726994] [2020-04-17 23:04:52,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301004186] [2020-04-17 23:04:52,687 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:52,740 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:52,740 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:52,751 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 23:04:52,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:52,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:52,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438240293] [2020-04-17 23:04:52,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:52,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:52,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:52,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:52,753 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 23:04:53,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:53,415 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-04-17 23:04:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 23:04:53,416 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:53,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:53,417 INFO L225 Difference]: With dead ends: 112 [2020-04-17 23:04:53,417 INFO L226 Difference]: Without dead ends: 106 [2020-04-17 23:04:53,417 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 23:04:53,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-04-17 23:04:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-04-17 23:04:53,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:04:53,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:04:53,420 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 23:04:53,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:53,420 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:04:53,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:53,420 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:04:53,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:53,420 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:53,420 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:53,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:53,621 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:53,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:53,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-04-17 23:04:53,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:53,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306174437] [2020-04-17 23:04:53,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:53,804 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 23:04:53,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306174437] [2020-04-17 23:04:53,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809858181] [2020-04-17 23:04:53,805 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 23:04:53,855 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:04:53,855 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:53,856 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:53,857 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:53,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:53,882 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 23:04:53,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:53,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:53,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679786470] [2020-04-17 23:04:53,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:53,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:53,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:53,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:53,883 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 23:04:54,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:54,732 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-04-17 23:04:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 23:04:54,733 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:54,733 INFO L225 Difference]: With dead ends: 111 [2020-04-17 23:04:54,733 INFO L226 Difference]: Without dead ends: 105 [2020-04-17 23:04:54,734 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 23:04:54,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-04-17 23:04:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-04-17 23:04:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:04:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:04:54,736 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 23:04:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:54,736 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:04:54,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:54,736 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:04:54,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:54,737 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:54,737 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:54,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:54,937 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:54,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:54,938 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-04-17 23:04:54,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:54,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868242384] [2020-04-17 23:04:54,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:55,112 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 23:04:55,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868242384] [2020-04-17 23:04:55,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609868533] [2020-04-17 23:04:55,113 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 23:04:55,173 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 23:04:55,173 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:55,174 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core [2020-04-17 23:04:55,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:55,186 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 23:04:55,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:55,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:55,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015739606] [2020-04-17 23:04:55,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:55,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:55,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:55,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:55,188 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 23:04:55,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:55,883 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-04-17 23:04:55,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 23:04:55,884 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:55,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:55,884 INFO L225 Difference]: With dead ends: 108 [2020-04-17 23:04:55,884 INFO L226 Difference]: Without dead ends: 102 [2020-04-17 23:04:55,885 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 23:04:55,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-04-17 23:04:55,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-04-17 23:04:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:04:55,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:04:55,887 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 23:04:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:55,887 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:04:55,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:04:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:55,888 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:55,888 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:56,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:56,092 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:56,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:56,093 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-04-17 23:04:56,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:56,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394268825] [2020-04-17 23:04:56,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:56,265 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 23:04:56,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394268825] [2020-04-17 23:04:56,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727332488] [2020-04-17 23:04:56,266 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 23:04:56,316 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:04:56,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:56,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:56,318 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:56,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:56,345 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 23:04:56,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:56,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:56,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841162601] [2020-04-17 23:04:56,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:56,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:56,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:56,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:56,346 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 23:04:57,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:57,284 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-04-17 23:04:57,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 23:04:57,285 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:57,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:57,285 INFO L225 Difference]: With dead ends: 107 [2020-04-17 23:04:57,285 INFO L226 Difference]: Without dead ends: 101 [2020-04-17 23:04:57,286 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 23:04:57,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-04-17 23:04:57,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-04-17 23:04:57,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:04:57,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:04:57,288 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 23:04:57,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:57,289 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:04:57,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:57,289 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:04:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:57,289 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:57,290 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:57,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:57,493 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:57,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:57,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-04-17 23:04:57,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:57,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772298789] [2020-04-17 23:04:57,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:57,656 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 23:04:57,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772298789] [2020-04-17 23:04:57,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807254620] [2020-04-17 23:04:57,657 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 23:04:57,711 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-04-17 23:04:57,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:57,712 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:57,713 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:57,726 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 23:04:57,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:57,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:04:57,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295845869] [2020-04-17 23:04:57,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:04:57,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:57,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:04:57,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:04:57,727 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 23:04:58,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:58,450 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-04-17 23:04:58,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 23:04:58,451 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:04:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:58,451 INFO L225 Difference]: With dead ends: 104 [2020-04-17 23:04:58,452 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 23:04:58,452 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 23:04:58,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 23:04:58,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-04-17 23:04:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:04:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:04:58,454 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-04-17 23:04:58,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:58,455 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:04:58,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:04:58,455 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:04:58,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:58,455 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:58,456 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:04:58,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:04:58,656 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:04:58,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:04:58,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-04-17 23:04:58,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:04:58,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330467267] [2020-04-17 23:04:58,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:04:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:04:58,816 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 23:04:58,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330467267] [2020-04-17 23:04:58,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665383578] [2020-04-17 23:04:58,817 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 23:04:58,877 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-04-17 23:04:58,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:04:58,878 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:04:58,879 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:04:58,894 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:04:58,906 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 23:04:58,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:04:58,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:04:58,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004301188] [2020-04-17 23:04:58,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:04:58,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:04:58,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:04:58,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:04:58,907 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-04-17 23:04:59,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:04:59,863 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-04-17 23:04:59,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 23:04:59,864 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:04:59,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:04:59,865 INFO L225 Difference]: With dead ends: 103 [2020-04-17 23:04:59,865 INFO L226 Difference]: Without dead ends: 97 [2020-04-17 23:04:59,865 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 23:04:59,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-04-17 23:04:59,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-04-17 23:04:59,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:04:59,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:04:59,867 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-04-17 23:04:59,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:04:59,868 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:04:59,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:04:59,868 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:04:59,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:04:59,868 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:04:59,868 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:00,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:00,069 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:00,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:00,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-04-17 23:05:00,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:00,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056714303] [2020-04-17 23:05:00,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:00,241 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 23:05:00,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056714303] [2020-04-17 23:05:00,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566376359] [2020-04-17 23:05:00,242 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 23:05:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:00,296 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:05:00,296 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:00,309 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 23:05:00,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:00,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-04-17 23:05:00,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298350018] [2020-04-17 23:05:00,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 23:05:00,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:00,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 23:05:00,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-04-17 23:05:00,311 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-04-17 23:05:01,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:01,090 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-04-17 23:05:01,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 23:05:01,090 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-04-17 23:05:01,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:01,091 INFO L225 Difference]: With dead ends: 119 [2020-04-17 23:05:01,091 INFO L226 Difference]: Without dead ends: 113 [2020-04-17 23:05:01,091 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 23:05:01,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-04-17 23:05:01,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-04-17 23:05:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-04-17 23:05:01,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-04-17 23:05:01,094 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-04-17 23:05:01,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:01,094 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-04-17 23:05:01,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 23:05:01,095 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-04-17 23:05:01,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:05:01,095 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:01,095 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:01,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:01,296 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:01,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:01,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-04-17 23:05:01,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:01,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741264681] [2020-04-17 23:05:01,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:01,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:01,457 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 23:05:01,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741264681] [2020-04-17 23:05:01,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968277406] [2020-04-17 23:05:01,458 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 23:05:01,513 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:05:01,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:01,514 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:01,514 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:01,545 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 23:05:01,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:01,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:05:01,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519888763] [2020-04-17 23:05:01,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:01,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:01,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:01,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:01,546 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-04-17 23:05:02,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:02,483 INFO L93 Difference]: Finished difference Result 98 states and 245 transitions. [2020-04-17 23:05:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 23:05:02,484 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:05:02,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:02,484 INFO L225 Difference]: With dead ends: 98 [2020-04-17 23:05:02,484 INFO L226 Difference]: Without dead ends: 90 [2020-04-17 23:05:02,485 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=924, Invalid=2382, Unknown=0, NotChecked=0, Total=3306 [2020-04-17 23:05:02,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-04-17 23:05:02,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 65. [2020-04-17 23:05:02,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-04-17 23:05:02,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-04-17 23:05:02,487 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-04-17 23:05:02,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:02,487 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-04-17 23:05:02,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:02,488 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-04-17 23:05:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-04-17 23:05:02,488 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:02,488 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:02,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:02,691 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:02,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:02,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-04-17 23:05:02,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:02,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173768640] [2020-04-17 23:05:02,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:02,874 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 23:05:02,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173768640] [2020-04-17 23:05:02,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065386769] [2020-04-17 23:05:02,874 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 23:05:02,930 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-04-17 23:05:02,931 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:02,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-04-17 23:05:02,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:02,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:02,985 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 23:05:02,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:02,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-04-17 23:05:02,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432801083] [2020-04-17 23:05:02,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:02,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:02,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:02,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:02,987 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-04-17 23:05:03,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:03,953 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-04-17 23:05:03,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 23:05:03,954 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-04-17 23:05:03,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:03,954 INFO L225 Difference]: With dead ends: 116 [2020-04-17 23:05:03,954 INFO L226 Difference]: Without dead ends: 111 [2020-04-17 23:05:03,955 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 23:05:03,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-04-17 23:05:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-04-17 23:05:03,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 23:05:03,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-04-17 23:05:03,957 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-04-17 23:05:03,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:03,958 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-04-17 23:05:03,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:03,958 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-04-17 23:05:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:03,958 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:03,958 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:04,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:04,159 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:04,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:04,160 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-04-17 23:05:04,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:04,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527809763] [2020-04-17 23:05:04,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:04,331 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 23:05:04,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527809763] [2020-04-17 23:05:04,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467908628] [2020-04-17 23:05:04,332 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 23:05:04,387 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:05:04,387 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:04,388 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:04,389 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:04,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:04,419 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 23:05:04,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:04,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:04,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107539880] [2020-04-17 23:05:04,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:04,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:04,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:04,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:04,421 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-04-17 23:05:05,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:05,457 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-04-17 23:05:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 23:05:05,457 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:05,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:05,458 INFO L225 Difference]: With dead ends: 96 [2020-04-17 23:05:05,458 INFO L226 Difference]: Without dead ends: 91 [2020-04-17 23:05:05,459 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 23:05:05,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-04-17 23:05:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-04-17 23:05:05,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-04-17 23:05:05,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-04-17 23:05:05,461 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-04-17 23:05:05,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:05,461 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-04-17 23:05:05,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-04-17 23:05:05,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:05,462 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:05,462 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:05,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:05,663 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:05,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:05,663 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-04-17 23:05:05,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:05,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057138283] [2020-04-17 23:05:05,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:05,894 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 23:05:05,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057138283] [2020-04-17 23:05:05,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710644553] [2020-04-17 23:05:05,895 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:05:05,957 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 23:05:05,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:05,959 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:05,960 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:05,966 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 23:05:05,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:05,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:05,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704424150] [2020-04-17 23:05:05,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:05,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:05,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:05,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:05,967 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-04-17 23:05:06,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:06,373 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-04-17 23:05:06,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-04-17 23:05:06,373 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:06,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:06,374 INFO L225 Difference]: With dead ends: 102 [2020-04-17 23:05:06,374 INFO L226 Difference]: Without dead ends: 96 [2020-04-17 23:05:06,374 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 23:05:06,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-04-17 23:05:06,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-04-17 23:05:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:05:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-04-17 23:05:06,376 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-04-17 23:05:06,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:06,377 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-04-17 23:05:06,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:06,377 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-04-17 23:05:06,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:06,377 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:06,378 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:06,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:06,578 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:06,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:06,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-04-17 23:05:06,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:06,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913950233] [2020-04-17 23:05:06,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:06,864 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 23:05:06,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913950233] [2020-04-17 23:05:06,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059191521] [2020-04-17 23:05:06,865 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 23:05:06,923 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 23:05:06,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:06,924 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:06,924 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:06,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:06,947 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 23:05:06,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:06,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:06,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282051638] [2020-04-17 23:05:06,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:06,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:06,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:06,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:06,948 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-04-17 23:05:07,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:07,368 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-04-17 23:05:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-17 23:05:07,368 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:07,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:07,369 INFO L225 Difference]: With dead ends: 122 [2020-04-17 23:05:07,369 INFO L226 Difference]: Without dead ends: 116 [2020-04-17 23:05:07,369 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 23:05:07,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-04-17 23:05:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-04-17 23:05:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-04-17 23:05:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-04-17 23:05:07,372 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-04-17 23:05:07,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:07,372 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-04-17 23:05:07,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:07,372 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-04-17 23:05:07,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:07,373 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:07,373 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:07,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:07,574 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:07,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:07,575 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-04-17 23:05:07,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:07,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142275665] [2020-04-17 23:05:07,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:07,818 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 23:05:07,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142275665] [2020-04-17 23:05:07,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971179283] [2020-04-17 23:05:07,818 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 23:05:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:07,870 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:07,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:07,877 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 23:05:07,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:07,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:07,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636349439] [2020-04-17 23:05:07,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:07,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:07,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:07,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:07,878 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-04-17 23:05:08,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:08,423 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-04-17 23:05:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-04-17 23:05:08,423 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:08,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:08,424 INFO L225 Difference]: With dead ends: 123 [2020-04-17 23:05:08,424 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 23:05:08,424 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 23:05:08,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 23:05:08,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-04-17 23:05:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-04-17 23:05:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-04-17 23:05:08,428 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-04-17 23:05:08,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:08,428 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-04-17 23:05:08,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:08,428 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-04-17 23:05:08,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:08,428 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:08,428 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:08,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:08,632 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:08,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:08,632 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-04-17 23:05:08,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:08,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348966619] [2020-04-17 23:05:08,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:08,879 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 23:05:08,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348966619] [2020-04-17 23:05:08,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829184932] [2020-04-17 23:05:08,880 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 23:05:08,929 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:05:08,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:08,931 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:08,931 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:08,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:08,957 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 23:05:08,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:08,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:08,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590780059] [2020-04-17 23:05:08,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:08,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:08,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:08,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:08,958 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-04-17 23:05:09,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:09,518 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-04-17 23:05:09,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-17 23:05:09,518 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:09,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:09,519 INFO L225 Difference]: With dead ends: 139 [2020-04-17 23:05:09,519 INFO L226 Difference]: Without dead ends: 133 [2020-04-17 23:05:09,519 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-04-17 23:05:09,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-04-17 23:05:09,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-04-17 23:05:09,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-04-17 23:05:09,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-04-17 23:05:09,522 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-04-17 23:05:09,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:09,523 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-04-17 23:05:09,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:09,523 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-04-17 23:05:09,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:09,523 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:09,523 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:09,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:09,726 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:09,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:09,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-04-17 23:05:09,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:09,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366062537] [2020-04-17 23:05:09,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:09,941 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 23:05:09,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366062537] [2020-04-17 23:05:09,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182633234] [2020-04-17 23:05:09,942 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 23:05:09,997 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 23:05:09,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:09,998 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:09,998 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:10,007 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 23:05:10,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:10,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:10,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378741348] [2020-04-17 23:05:10,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:10,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:10,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:10,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:10,008 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-04-17 23:05:10,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:10,562 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-04-17 23:05:10,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-04-17 23:05:10,563 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:10,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:10,563 INFO L225 Difference]: With dead ends: 139 [2020-04-17 23:05:10,563 INFO L226 Difference]: Without dead ends: 133 [2020-04-17 23:05:10,564 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 23:05:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-04-17 23:05:10,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-04-17 23:05:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-04-17 23:05:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-04-17 23:05:10,566 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-04-17 23:05:10,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:10,566 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-04-17 23:05:10,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:10,566 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-04-17 23:05:10,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:10,567 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:10,567 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:10,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:10,768 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:10,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:10,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-04-17 23:05:10,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:10,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273230542] [2020-04-17 23:05:10,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:10,988 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 23:05:10,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273230542] [2020-04-17 23:05:10,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765841976] [2020-04-17 23:05:10,989 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 23:05:11,040 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:05:11,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:11,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:11,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:11,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:11,066 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 23:05:11,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:11,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:11,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914233973] [2020-04-17 23:05:11,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:11,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:11,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:11,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:11,067 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-04-17 23:05:11,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:11,674 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-04-17 23:05:11,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-04-17 23:05:11,674 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:11,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:11,674 INFO L225 Difference]: With dead ends: 136 [2020-04-17 23:05:11,675 INFO L226 Difference]: Without dead ends: 130 [2020-04-17 23:05:11,675 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 23:05:11,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-04-17 23:05:11,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-04-17 23:05:11,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-04-17 23:05:11,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-04-17 23:05:11,677 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-04-17 23:05:11,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:11,677 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-04-17 23:05:11,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:11,678 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-04-17 23:05:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:11,678 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:11,678 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:11,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:11,879 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:11,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-04-17 23:05:11,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:11,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913823038] [2020-04-17 23:05:11,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:12,082 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 23:05:12,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913823038] [2020-04-17 23:05:12,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604618992] [2020-04-17 23:05:12,083 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 23:05:12,136 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 23:05:12,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:12,137 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:12,138 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:12,146 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 23:05:12,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:12,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:12,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138154785] [2020-04-17 23:05:12,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:12,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:12,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:12,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:12,147 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-04-17 23:05:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:12,692 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-04-17 23:05:12,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-04-17 23:05:12,692 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:12,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:12,693 INFO L225 Difference]: With dead ends: 137 [2020-04-17 23:05:12,693 INFO L226 Difference]: Without dead ends: 131 [2020-04-17 23:05:12,694 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-04-17 23:05:12,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-04-17 23:05:12,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-04-17 23:05:12,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-04-17 23:05:12,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-04-17 23:05:12,696 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-04-17 23:05:12,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:12,696 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-04-17 23:05:12,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:12,696 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-04-17 23:05:12,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:12,697 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:12,697 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:12,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:12,898 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:12,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:12,898 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-04-17 23:05:12,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:12,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670195039] [2020-04-17 23:05:12,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:13,112 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 23:05:13,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670195039] [2020-04-17 23:05:13,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021837750] [2020-04-17 23:05:13,113 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 23:05:13,170 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 23:05:13,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:13,171 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:13,172 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:13,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:13,196 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 23:05:13,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:13,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:13,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977616968] [2020-04-17 23:05:13,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:13,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:13,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:13,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:13,197 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-04-17 23:05:13,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:13,845 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-04-17 23:05:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-04-17 23:05:13,846 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:13,846 INFO L225 Difference]: With dead ends: 134 [2020-04-17 23:05:13,847 INFO L226 Difference]: Without dead ends: 128 [2020-04-17 23:05:13,847 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-04-17 23:05:13,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-04-17 23:05:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-04-17 23:05:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-04-17 23:05:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-04-17 23:05:13,850 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-04-17 23:05:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:13,850 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-04-17 23:05:13,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-04-17 23:05:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:13,851 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:13,851 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:14,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:14,052 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:14,053 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-04-17 23:05:14,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:14,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610203764] [2020-04-17 23:05:14,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:14,267 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 23:05:14,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610203764] [2020-04-17 23:05:14,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309775843] [2020-04-17 23:05:14,268 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 23:05:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:14,317 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:14,318 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:14,328 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 23:05:14,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:14,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:14,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517137976] [2020-04-17 23:05:14,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:14,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:14,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:14,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:14,330 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-04-17 23:05:14,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:14,922 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-04-17 23:05:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-04-17 23:05:14,922 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:14,923 INFO L225 Difference]: With dead ends: 135 [2020-04-17 23:05:14,923 INFO L226 Difference]: Without dead ends: 129 [2020-04-17 23:05:14,923 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 23:05:14,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-04-17 23:05:14,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-04-17 23:05:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-04-17 23:05:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-04-17 23:05:14,926 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-04-17 23:05:14,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:14,926 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-04-17 23:05:14,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:14,926 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-04-17 23:05:14,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:14,926 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:14,927 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:15,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:15,128 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:15,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:15,128 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-04-17 23:05:15,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:15,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225306691] [2020-04-17 23:05:15,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:15,330 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 23:05:15,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225306691] [2020-04-17 23:05:15,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371521752] [2020-04-17 23:05:15,331 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 23:05:15,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:05:15,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:15,380 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:15,380 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:15,396 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:15,406 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 23:05:15,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:15,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:15,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987078293] [2020-04-17 23:05:15,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:15,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:15,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:15,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:15,407 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-04-17 23:05:16,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:16,130 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-04-17 23:05:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-04-17 23:05:16,130 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:16,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:16,131 INFO L225 Difference]: With dead ends: 132 [2020-04-17 23:05:16,131 INFO L226 Difference]: Without dead ends: 126 [2020-04-17 23:05:16,131 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 23:05:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-04-17 23:05:16,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-04-17 23:05:16,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-04-17 23:05:16,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-04-17 23:05:16,134 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-04-17 23:05:16,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:16,134 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-04-17 23:05:16,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:16,134 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-04-17 23:05:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:16,134 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:16,135 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:16,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:16,335 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:16,336 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-04-17 23:05:16,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:16,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564875154] [2020-04-17 23:05:16,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:16,535 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 23:05:16,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564875154] [2020-04-17 23:05:16,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827318232] [2020-04-17 23:05:16,536 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 23:05:16,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 23:05:16,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:16,595 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:16,595 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:16,607 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 23:05:16,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:16,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:16,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628275061] [2020-04-17 23:05:16,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:16,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:16,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:16,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:16,609 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-04-17 23:05:17,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:17,264 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-04-17 23:05:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-04-17 23:05:17,265 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:17,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:17,265 INFO L225 Difference]: With dead ends: 133 [2020-04-17 23:05:17,266 INFO L226 Difference]: Without dead ends: 127 [2020-04-17 23:05:17,266 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 23:05:17,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-04-17 23:05:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-04-17 23:05:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-04-17 23:05:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-04-17 23:05:17,269 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-04-17 23:05:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:17,269 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-04-17 23:05:17,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-04-17 23:05:17,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:17,269 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:17,269 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:17,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:17,470 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-04-17 23:05:17,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:17,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660999859] [2020-04-17 23:05:17,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:17,663 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 23:05:17,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660999859] [2020-04-17 23:05:17,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842104902] [2020-04-17 23:05:17,663 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 23:05:17,717 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:05:17,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:17,718 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:17,718 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:17,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:17,749 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 23:05:17,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:17,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:17,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672653600] [2020-04-17 23:05:17,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:17,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:17,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:17,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:17,763 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-04-17 23:05:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:18,586 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-04-17 23:05:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-04-17 23:05:18,586 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:18,587 INFO L225 Difference]: With dead ends: 130 [2020-04-17 23:05:18,587 INFO L226 Difference]: Without dead ends: 124 [2020-04-17 23:05:18,588 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-04-17 23:05:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-04-17 23:05:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-04-17 23:05:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-04-17 23:05:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-04-17 23:05:18,590 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-04-17 23:05:18,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:18,590 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-04-17 23:05:18,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:18,590 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-04-17 23:05:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:18,591 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:18,591 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:18,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:18,791 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:18,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:18,792 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-04-17 23:05:18,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:18,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101997726] [2020-04-17 23:05:18,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:18,983 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 23:05:18,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101997726] [2020-04-17 23:05:18,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291260185] [2020-04-17 23:05:18,984 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 23:05:19,043 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 23:05:19,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:19,044 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:19,045 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:19,056 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 23:05:19,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:19,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:19,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822400185] [2020-04-17 23:05:19,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:19,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:19,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:19,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:19,057 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-04-17 23:05:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:19,795 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-04-17 23:05:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-04-17 23:05:19,796 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:19,796 INFO L225 Difference]: With dead ends: 131 [2020-04-17 23:05:19,796 INFO L226 Difference]: Without dead ends: 125 [2020-04-17 23:05:19,797 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 23:05:19,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-04-17 23:05:19,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-04-17 23:05:19,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-04-17 23:05:19,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-04-17 23:05:19,800 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-04-17 23:05:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:19,800 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-04-17 23:05:19,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:19,800 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-04-17 23:05:19,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:19,801 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:19,801 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:20,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:20,004 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:20,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:20,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-04-17 23:05:20,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:20,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879461310] [2020-04-17 23:05:20,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:20,229 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 23:05:20,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879461310] [2020-04-17 23:05:20,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494247050] [2020-04-17 23:05:20,229 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 23:05:20,290 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 23:05:20,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:20,291 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:20,291 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:20,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:20,324 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 23:05:20,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:20,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:20,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287454638] [2020-04-17 23:05:20,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:20,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:20,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:20,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:20,325 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-04-17 23:05:21,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:21,229 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-04-17 23:05:21,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-04-17 23:05:21,230 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:21,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:21,230 INFO L225 Difference]: With dead ends: 128 [2020-04-17 23:05:21,230 INFO L226 Difference]: Without dead ends: 122 [2020-04-17 23:05:21,231 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 23:05:21,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-04-17 23:05:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-04-17 23:05:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-04-17 23:05:21,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-04-17 23:05:21,233 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-04-17 23:05:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:21,234 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-04-17 23:05:21,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:21,234 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-04-17 23:05:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:21,234 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:21,235 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:21,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:21,435 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:21,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:21,436 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-04-17 23:05:21,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:21,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970540513] [2020-04-17 23:05:21,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:21,629 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 23:05:21,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970540513] [2020-04-17 23:05:21,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022260345] [2020-04-17 23:05:21,630 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 23:05:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:21,683 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:21,684 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:21,696 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 23:05:21,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:21,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:21,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584876717] [2020-04-17 23:05:21,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:21,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:21,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:21,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:21,697 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-04-17 23:05:22,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:22,495 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-04-17 23:05:22,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-04-17 23:05:22,495 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:22,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:22,496 INFO L225 Difference]: With dead ends: 129 [2020-04-17 23:05:22,496 INFO L226 Difference]: Without dead ends: 123 [2020-04-17 23:05:22,497 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 23:05:22,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-04-17 23:05:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-04-17 23:05:22,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-04-17 23:05:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-04-17 23:05:22,499 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-04-17 23:05:22,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:22,499 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-04-17 23:05:22,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-04-17 23:05:22,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:22,500 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:22,500 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:22,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:22,701 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:22,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:22,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-04-17 23:05:22,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:22,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922895799] [2020-04-17 23:05:22,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:22,880 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 23:05:22,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922895799] [2020-04-17 23:05:22,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46180240] [2020-04-17 23:05:22,880 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 23:05:22,926 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-17 23:05:22,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:22,928 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:22,928 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:22,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:22,958 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 23:05:22,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:22,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:22,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492462918] [2020-04-17 23:05:22,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:22,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:22,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:22,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:22,959 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-04-17 23:05:23,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:23,950 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-04-17 23:05:23,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-04-17 23:05:23,950 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:23,951 INFO L225 Difference]: With dead ends: 126 [2020-04-17 23:05:23,951 INFO L226 Difference]: Without dead ends: 120 [2020-04-17 23:05:23,951 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 23:05:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-04-17 23:05:23,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-04-17 23:05:23,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-04-17 23:05:23,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-04-17 23:05:23,953 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-04-17 23:05:23,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:23,954 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-04-17 23:05:23,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:23,954 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-04-17 23:05:23,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:23,954 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:23,954 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:24,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:24,155 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:24,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:24,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-04-17 23:05:24,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:24,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397949085] [2020-04-17 23:05:24,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:24,334 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 23:05:24,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397949085] [2020-04-17 23:05:24,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90275709] [2020-04-17 23:05:24,335 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 23:05:24,391 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-04-17 23:05:24,391 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:24,392 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 28 conjunts are in the unsatisfiable core [2020-04-17 23:05:24,393 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:24,414 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 23:05:24,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:24,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:24,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693082610] [2020-04-17 23:05:24,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:24,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:24,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:24,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:24,415 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-04-17 23:05:25,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:25,197 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-04-17 23:05:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-04-17 23:05:25,197 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:25,198 INFO L225 Difference]: With dead ends: 127 [2020-04-17 23:05:25,198 INFO L226 Difference]: Without dead ends: 121 [2020-04-17 23:05:25,198 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 23:05:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-04-17 23:05:25,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-04-17 23:05:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-04-17 23:05:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-04-17 23:05:25,201 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-04-17 23:05:25,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:25,201 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-04-17 23:05:25,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-04-17 23:05:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:25,202 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:25,202 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:25,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:25,403 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:25,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:25,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-04-17 23:05:25,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:25,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141594558] [2020-04-17 23:05:25,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:25,579 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 23:05:25,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141594558] [2020-04-17 23:05:25,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829177973] [2020-04-17 23:05:25,580 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 23:05:25,632 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-17 23:05:25,632 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:25,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:25,634 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:25,650 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:25,663 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 23:05:25,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:25,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:25,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622133468] [2020-04-17 23:05:25,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:25,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:25,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:25,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:25,664 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-04-17 23:05:26,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:26,666 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-04-17 23:05:26,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-04-17 23:05:26,667 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:26,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:26,667 INFO L225 Difference]: With dead ends: 124 [2020-04-17 23:05:26,667 INFO L226 Difference]: Without dead ends: 118 [2020-04-17 23:05:26,668 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-04-17 23:05:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-04-17 23:05:26,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-04-17 23:05:26,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-04-17 23:05:26,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-04-17 23:05:26,670 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-04-17 23:05:26,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:26,670 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-04-17 23:05:26,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:26,671 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-04-17 23:05:26,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:26,671 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:26,671 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:26,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:26,872 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:26,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:26,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-04-17 23:05:26,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:26,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812585217] [2020-04-17 23:05:26,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:27,050 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 23:05:27,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812585217] [2020-04-17 23:05:27,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819547744] [2020-04-17 23:05:27,051 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 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 23:05:27,105 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-04-17 23:05:27,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:27,106 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:27,107 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:27,120 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 23:05:27,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:27,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-04-17 23:05:27,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868175365] [2020-04-17 23:05:27,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-17 23:05:27,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:27,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-17 23:05:27,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-04-17 23:05:27,121 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-04-17 23:05:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:27,934 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-04-17 23:05:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-04-17 23:05:27,934 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-04-17 23:05:27,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:27,935 INFO L225 Difference]: With dead ends: 144 [2020-04-17 23:05:27,935 INFO L226 Difference]: Without dead ends: 138 [2020-04-17 23:05:27,936 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-04-17 23:05:27,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-04-17 23:05:27,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-04-17 23:05:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-04-17 23:05:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-04-17 23:05:27,938 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-04-17 23:05:27,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:27,939 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-04-17 23:05:27,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-17 23:05:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-04-17 23:05:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-04-17 23:05:27,939 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:27,939 INFO L425 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:28,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:28,140 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:28,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:28,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-04-17 23:05:28,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:28,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974347939] [2020-04-17 23:05:28,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 23:05:28,315 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 23:05:28,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974347939] [2020-04-17 23:05:28,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395894022] [2020-04-17 23:05:28,316 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 23:05:28,374 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-04-17 23:05:28,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-17 23:05:28,375 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-04-17 23:05:28,375 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 23:05:28,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2020-04-17 23:05:28,403 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 23:05:28,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 23:05:28,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-04-17 23:05:28,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722038495] [2020-04-17 23:05:28,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-04-17 23:05:28,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 23:05:28,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-04-17 23:05:28,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-04-17 23:05:28,405 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-04-17 23:05:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 23:05:29,431 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-04-17 23:05:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-04-17 23:05:29,432 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-04-17 23:05:29,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 23:05:29,433 INFO L225 Difference]: With dead ends: 125 [2020-04-17 23:05:29,433 INFO L226 Difference]: Without dead ends: 117 [2020-04-17 23:05:29,433 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-04-17 23:05:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-04-17 23:05:29,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-04-17 23:05:29,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-04-17 23:05:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-04-17 23:05:29,436 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-04-17 23:05:29,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 23:05:29,436 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-04-17 23:05:29,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-04-17 23:05:29,436 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-04-17 23:05:29,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-04-17 23:05:29,437 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 23:05:29,437 INFO L425 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 23:05:29,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 23:05:29,638 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 23:05:29,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 23:05:29,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-04-17 23:05:29,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 23:05:29,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574728074] [2020-04-17 23:05:29,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 23:05:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 23:05:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 23:05:29,693 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 23:05:29,693 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 23:05:29,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 11:05:29 BasicIcfg [2020-04-17 23:05:29,805 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 23:05:29,806 INFO L168 Benchmark]: Toolchain (without parser) took 199959.33 ms. Allocated memory was 142.1 MB in the beginning and 379.1 MB in the end (delta: 237.0 MB). Free memory was 98.3 MB in the beginning and 83.2 MB in the end (delta: 15.2 MB). Peak memory consumption was 252.1 MB. Max. memory is 7.1 GB. [2020-04-17 23:05:29,806 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 142.1 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-04-17 23:05:29,807 INFO L168 Benchmark]: CACSL2BoogieTranslator took 663.78 ms. Allocated memory was 142.1 MB in the beginning and 199.2 MB in the end (delta: 57.1 MB). Free memory was 96.4 MB in the beginning and 156.1 MB in the end (delta: -59.7 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-04-17 23:05:29,807 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.67 ms. Allocated memory is still 199.2 MB. Free memory was 156.1 MB in the beginning and 153.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-04-17 23:05:29,808 INFO L168 Benchmark]: Boogie Preprocessor took 35.56 ms. Allocated memory is still 199.2 MB. Free memory was 153.9 MB in the beginning and 152.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-17 23:05:29,808 INFO L168 Benchmark]: RCFGBuilder took 521.02 ms. Allocated memory is still 199.2 MB. Free memory was 152.5 MB in the beginning and 132.6 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-04-17 23:05:29,809 INFO L168 Benchmark]: TraceAbstraction took 198652.56 ms. Allocated memory was 199.2 MB in the beginning and 379.1 MB in the end (delta: 179.8 MB). Free memory was 131.8 MB in the beginning and 83.2 MB in the end (delta: 48.7 MB). Peak memory consumption was 228.5 MB. Max. memory is 7.1 GB. [2020-04-17 23:05:29,811 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 142.1 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 663.78 ms. Allocated memory was 142.1 MB in the beginning and 199.2 MB in the end (delta: 57.1 MB). Free memory was 96.4 MB in the beginning and 156.1 MB in the end (delta: -59.7 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 61.67 ms. Allocated memory is still 199.2 MB. Free memory was 156.1 MB in the beginning and 153.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.56 ms. Allocated memory is still 199.2 MB. Free memory was 153.9 MB in the beginning and 152.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 521.02 ms. Allocated memory is still 199.2 MB. Free memory was 152.5 MB in the beginning and 132.6 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 198652.56 ms. Allocated memory was 199.2 MB in the beginning and 379.1 MB in the end (delta: 179.8 MB). Free memory was 131.8 MB in the beginning and 83.2 MB in the end (delta: 48.7 MB). Peak memory consumption was 228.5 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, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L697] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L700] 0 int condJ = j >= (2*10 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 198.4s, OverallIterations: 219, TraceHistogramMax: 10, AutomataDifference: 104.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 3487 SDtfs, 12105 SDslu, 22688 SDs, 0 SdLazy, 24430 SolverSat, 13631 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11874 GetRequests, 3914 SyntacticMatches, 213 SemanticMatches, 7747 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75743 ImplicationChecksByTransitivity, 102.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 218 MinimizatonAttempts, 5503 StatesRemovedByMinimization, 217 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.6s SsaConstructionTime, 4.9s SatisfiabilityAnalysisTime, 34.3s InterpolantComputationTime, 8982 NumberOfCodeBlocks, 8982 NumberOfCodeBlocksAsserted, 1118 NumberOfCheckSat, 8523 ConstructedInterpolants, 0 QuantifiedInterpolants, 805507 SizeOfPredicates, 2755 NumberOfNonLiveVariables, 27387 ConjunctsInSsa, 3623 ConjunctsInUnsatCore, 431 InterpolantComputations, 5 PerfectInterpolantSequences, 0/17250 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...