/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-11 13:13:38,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-11 13:13:38,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-11 13:13:38,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-11 13:13:38,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-11 13:13:38,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-11 13:13:38,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-11 13:13:38,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-11 13:13:38,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-11 13:13:38,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-11 13:13:38,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-11 13:13:38,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-11 13:13:38,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-11 13:13:38,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-11 13:13:38,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-11 13:13:38,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-11 13:13:38,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-11 13:13:38,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-11 13:13:38,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-11 13:13:38,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-11 13:13:38,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-11 13:13:38,514 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-11 13:13:38,515 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-11 13:13:38,516 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-11 13:13:38,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-11 13:13:38,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-11 13:13:38,523 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-11 13:13:38,531 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-11 13:13:38,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-11 13:13:38,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-11 13:13:38,533 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-11 13:13:38,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-11 13:13:38,538 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-11 13:13:38,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-11 13:13:38,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-11 13:13:38,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-11 13:13:38,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-11 13:13:38,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-11 13:13:38,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-11 13:13:38,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-11 13:13:38,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-11 13:13:38,546 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-11 13:13:38,586 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-11 13:13:38,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-11 13:13:38,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-11 13:13:38,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-11 13:13:38,589 INFO L138 SettingsManager]: * Use SBE=true [2020-10-11 13:13:38,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-11 13:13:38,589 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-11 13:13:38,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-11 13:13:38,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-11 13:13:38,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-11 13:13:38,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-11 13:13:38,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-11 13:13:38,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-11 13:13:38,590 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-11 13:13:38,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-11 13:13:38,591 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-11 13:13:38,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-11 13:13:38,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-11 13:13:38,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-11 13:13:38,592 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-11 13:13:38,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-11 13:13:38,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-11 13:13:38,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-11 13:13:38,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-11 13:13:38,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-11 13:13:38,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-11 13:13:38,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-11 13:13:38,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-11 13:13:38,593 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-11 13:13:38,594 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-11 13:13:38,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-11 13:13:38,877 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-11 13:13:38,880 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-11 13:13:38,882 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-11 13:13:38,882 INFO L275 PluginConnector]: CDTParser initialized [2020-10-11 13:13:38,883 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-10-11 13:13:38,935 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f3ff629f/2cefb00a353b461cb2c17430fcd947a4/FLAG293da03de [2020-10-11 13:13:39,449 INFO L306 CDTParser]: Found 1 translation units. [2020-10-11 13:13:39,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-10-11 13:13:39,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f3ff629f/2cefb00a353b461cb2c17430fcd947a4/FLAG293da03de [2020-10-11 13:13:39,738 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f3ff629f/2cefb00a353b461cb2c17430fcd947a4 [2020-10-11 13:13:39,747 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-11 13:13:39,749 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-11 13:13:39,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-11 13:13:39,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-11 13:13:39,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-11 13:13:39,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:13:39" (1/1) ... [2020-10-11 13:13:39,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69112eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:39, skipping insertion in model container [2020-10-11 13:13:39,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 01:13:39" (1/1) ... [2020-10-11 13:13:39,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-11 13:13:39,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-11 13:13:40,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 13:13:40,301 INFO L203 MainTranslator]: Completed pre-run [2020-10-11 13:13:40,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-11 13:13:40,430 INFO L208 MainTranslator]: Completed translation [2020-10-11 13:13:40,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:40 WrapperNode [2020-10-11 13:13:40,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-11 13:13:40,434 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-11 13:13:40,434 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-11 13:13:40,434 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-11 13:13:40,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:40" (1/1) ... [2020-10-11 13:13:40,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:40" (1/1) ... [2020-10-11 13:13:40,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-11 13:13:40,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-11 13:13:40,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-11 13:13:40,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-11 13:13:40,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:40" (1/1) ... [2020-10-11 13:13:40,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:40" (1/1) ... [2020-10-11 13:13:40,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:40" (1/1) ... [2020-10-11 13:13:40,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:40" (1/1) ... [2020-10-11 13:13:40,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:40" (1/1) ... [2020-10-11 13:13:40,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:40" (1/1) ... [2020-10-11 13:13:40,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:40" (1/1) ... [2020-10-11 13:13:40,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-11 13:13:40,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-11 13:13:40,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-11 13:13:40,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-11 13:13:40,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:40" (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 [2020-10-11 13:13:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-11 13:13:40,568 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-11 13:13:40,568 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-11 13:13:40,568 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-11 13:13:40,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-11 13:13:40,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-11 13:13:40,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-11 13:13:40,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-11 13:13:40,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-11 13:13:40,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-11 13:13:40,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-11 13:13:40,577 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-11 13:13:40,880 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-11 13:13:40,880 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-11 13:13:40,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:13:40 BoogieIcfgContainer [2020-10-11 13:13:40,883 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-11 13:13:40,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-11 13:13:40,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-11 13:13:40,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-11 13:13:40,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 01:13:39" (1/3) ... [2020-10-11 13:13:40,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387f7eed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:13:40, skipping insertion in model container [2020-10-11 13:13:40,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 01:13:40" (2/3) ... [2020-10-11 13:13:40,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@387f7eed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 01:13:40, skipping insertion in model container [2020-10-11 13:13:40,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 01:13:40" (3/3) ... [2020-10-11 13:13:40,914 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2020-10-11 13:13:40,933 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-11 13:13:40,933 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-11 13:13:40,939 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-11 13:13:40,940 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-11 13:13:40,965 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,965 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,966 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,966 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,967 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,967 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,967 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,967 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,968 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,968 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,968 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,968 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,969 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,969 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,969 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,970 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,970 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,970 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,970 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,971 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,971 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,971 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,971 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,972 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,972 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,972 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,973 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,973 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,976 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,977 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,977 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,977 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,977 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,977 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,982 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,983 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,983 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,983 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,983 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,984 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-11 13:13:40,999 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-11 13:13:41,018 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-11 13:13:41,018 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-11 13:13:41,018 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-11 13:13:41,018 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-11 13:13:41,018 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-11 13:13:41,019 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-11 13:13:41,019 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-11 13:13:41,019 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-11 13:13:41,029 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-11 13:13:41,032 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-11 13:13:41,035 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-11 13:13:41,037 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-11 13:13:41,073 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-11 13:13:41,074 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-11 13:13:41,079 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. [2020-10-11 13:13:41,081 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-11 13:13:42,287 INFO L132 LiptonReduction]: Checked pairs total: 911 [2020-10-11 13:13:42,288 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-11 13:13:42,295 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-11 13:13:42,307 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-11 13:13:42,310 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-11 13:13:42,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-11 13:13:42,317 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:42,318 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-11 13:13:42,318 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:42,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:42,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-11 13:13:42,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:42,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943728616] [2020-10-11 13:13:42,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:42,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:42,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943728616] [2020-10-11 13:13:42,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:42,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-11 13:13:42,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197136425] [2020-10-11 13:13:42,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-11 13:13:42,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:42,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-11 13:13:42,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-11 13:13:42,604 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-11 13:13:42,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:42,677 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-11 13:13:42,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-11 13:13:42,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-11 13:13:42,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:42,691 INFO L225 Difference]: With dead ends: 75 [2020-10-11 13:13:42,691 INFO L226 Difference]: Without dead ends: 42 [2020-10-11 13:13:42,693 INFO L673 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 [2020-10-11 13:13:42,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-11 13:13:42,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-11 13:13:42,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-11 13:13:42,733 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-11 13:13:42,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:42,734 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-11 13:13:42,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-11 13:13:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-11 13:13:42,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-11 13:13:42,735 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:42,735 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:42,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-11 13:13:42,736 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:42,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:42,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-11 13:13:42,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:42,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122004658] [2020-10-11 13:13:42,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:42,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122004658] [2020-10-11 13:13:42,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:42,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-11 13:13:42,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741662358] [2020-10-11 13:13:42,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-11 13:13:42,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:42,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-11 13:13:42,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-11 13:13:42,814 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-11 13:13:42,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:42,849 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-11 13:13:42,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-11 13:13:42,849 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-11 13:13:42,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:42,851 INFO L225 Difference]: With dead ends: 56 [2020-10-11 13:13:42,851 INFO L226 Difference]: Without dead ends: 50 [2020-10-11 13:13:42,852 INFO L673 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 [2020-10-11 13:13:42,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-11 13:13:42,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-11 13:13:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:42,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-11 13:13:42,860 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-11 13:13:42,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:42,861 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-11 13:13:42,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-11 13:13:42,861 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-11 13:13:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 13:13:42,862 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:42,863 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:42,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-11 13:13:42,863 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:42,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:42,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-11 13:13:42,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:42,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120950086] [2020-10-11 13:13:42,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:42,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120950086] [2020-10-11 13:13:42,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:42,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 13:13:42,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432027041] [2020-10-11 13:13:42,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 13:13:42,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:42,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 13:13:42,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:13:42,958 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-11 13:13:43,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:43,036 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-11 13:13:43,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:13:43,037 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 13:13:43,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:43,038 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:13:43,039 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:43,039 INFO L673 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 [2020-10-11 13:13:43,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:43,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-11 13:13:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:43,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-11 13:13:43,049 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-11 13:13:43,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:43,049 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-11 13:13:43,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 13:13:43,050 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-11 13:13:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 13:13:43,051 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:43,051 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:43,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-11 13:13:43,051 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:43,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:43,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-11 13:13:43,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:43,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162608022] [2020-10-11 13:13:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:43,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162608022] [2020-10-11 13:13:43,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:43,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 13:13:43,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132897666] [2020-10-11 13:13:43,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 13:13:43,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:43,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 13:13:43,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:13:43,157 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-11 13:13:43,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:43,246 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-11 13:13:43,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 13:13:43,247 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 13:13:43,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:43,248 INFO L225 Difference]: With dead ends: 54 [2020-10-11 13:13:43,248 INFO L226 Difference]: Without dead ends: 43 [2020-10-11 13:13:43,248 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:43,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-11 13:13:43,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-11 13:13:43,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-11 13:13:43,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-11 13:13:43,253 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-11 13:13:43,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:43,254 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-11 13:13:43,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 13:13:43,254 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-11 13:13:43,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-11 13:13:43,255 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:43,255 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:43,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-11 13:13:43,255 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:43,256 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-11 13:13:43,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:43,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605097365] [2020-10-11 13:13:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:43,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605097365] [2020-10-11 13:13:43,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-11 13:13:43,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-11 13:13:43,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628202300] [2020-10-11 13:13:43,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-11 13:13:43,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:43,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-11 13:13:43,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-11 13:13:43,314 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-11 13:13:43,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:43,378 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-11 13:13:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-11 13:13:43,379 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-11 13:13:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:43,380 INFO L225 Difference]: With dead ends: 57 [2020-10-11 13:13:43,380 INFO L226 Difference]: Without dead ends: 51 [2020-10-11 13:13:43,380 INFO L673 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 [2020-10-11 13:13:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-11 13:13:43,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-11 13:13:43,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-11 13:13:43,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-11 13:13:43,385 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-11 13:13:43,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:43,386 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-11 13:13:43,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-11 13:13:43,386 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-11 13:13:43,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:43,387 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:43,387 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:43,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-11 13:13:43,387 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:43,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:43,388 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-11 13:13:43,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:43,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455267901] [2020-10-11 13:13:43,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:43,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455267901] [2020-10-11 13:13:43,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989778880] [2020-10-11 13:13:43,451 INFO L93 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 [2020-10-11 13:13:43,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:43,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:43,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:43,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:43,571 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:43,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:43,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 13:13:43,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312722014] [2020-10-11 13:13:43,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:43,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:43,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:43,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:43,601 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-11 13:13:43,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:43,699 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-11 13:13:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:13:43,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-11 13:13:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:43,700 INFO L225 Difference]: With dead ends: 48 [2020-10-11 13:13:43,700 INFO L226 Difference]: Without dead ends: 43 [2020-10-11 13:13:43,701 INFO L673 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 [2020-10-11 13:13:43,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-11 13:13:43,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-11 13:13:43,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-11 13:13:43,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-11 13:13:43,705 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-11 13:13:43,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:43,706 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-11 13:13:43,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:43,706 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-11 13:13:43,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:43,707 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:43,707 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:43,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-11 13:13:43,918 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:43,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:43,918 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-11 13:13:43,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:43,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366567325] [2020-10-11 13:13:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:43,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:43,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366567325] [2020-10-11 13:13:43,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509860245] [2020-10-11 13:13:43,988 INFO L93 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 [2020-10-11 13:13:44,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:44,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:44,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:44,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:44,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:44,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-11 13:13:44,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712863930] [2020-10-11 13:13:44,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 13:13:44,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:44,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 13:13:44,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-11 13:13:44,070 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-11 13:13:44,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:44,128 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-11 13:13:44,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-11 13:13:44,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-11 13:13:44,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:44,130 INFO L225 Difference]: With dead ends: 54 [2020-10-11 13:13:44,130 INFO L226 Difference]: Without dead ends: 48 [2020-10-11 13:13:44,130 INFO L673 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 [2020-10-11 13:13:44,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-11 13:13:44,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-11 13:13:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:44,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-11 13:13:44,135 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-11 13:13:44,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:44,136 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-11 13:13:44,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 13:13:44,136 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-11 13:13:44,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:44,137 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:44,137 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:44,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:44,348 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:44,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:44,349 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-11 13:13:44,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:44,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55925791] [2020-10-11 13:13:44,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:44,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55925791] [2020-10-11 13:13:44,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554233067] [2020-10-11 13:13:44,406 INFO L93 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 [2020-10-11 13:13:44,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 13:13:44,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:44,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:44,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:44,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:44,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:44,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 13:13:44,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637009682] [2020-10-11 13:13:44,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:44,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:44,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:44,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:44,518 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-11 13:13:44,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:44,633 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-11 13:13:44,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-11 13:13:44,633 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-11 13:13:44,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:44,634 INFO L225 Difference]: With dead ends: 58 [2020-10-11 13:13:44,634 INFO L226 Difference]: Without dead ends: 52 [2020-10-11 13:13:44,635 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:44,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-11 13:13:44,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-11 13:13:44,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-11 13:13:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-11 13:13:44,646 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-11 13:13:44,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:44,648 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-11 13:13:44,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:44,648 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-11 13:13:44,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:44,649 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:44,650 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:44,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:44,862 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:44,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:44,863 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-11 13:13:44,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:44,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169181818] [2020-10-11 13:13:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:44,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169181818] [2020-10-11 13:13:44,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450491837] [2020-10-11 13:13:44,947 INFO L93 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 [2020-10-11 13:13:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:44,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:44,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:45,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:45,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-11 13:13:45,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605066486] [2020-10-11 13:13:45,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-11 13:13:45,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:45,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-11 13:13:45,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-11 13:13:45,011 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-11 13:13:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:45,149 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-11 13:13:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:45,150 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-11 13:13:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:45,152 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:13:45,152 INFO L226 Difference]: Without dead ends: 72 [2020-10-11 13:13:45,152 INFO L673 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 [2020-10-11 13:13:45,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-11 13:13:45,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-11 13:13:45,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-11 13:13:45,157 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-11 13:13:45,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:45,158 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-11 13:13:45,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-11 13:13:45,158 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-11 13:13:45,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-11 13:13:45,159 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:45,159 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:45,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:45,372 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:45,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:45,373 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-11 13:13:45,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:45,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715030305] [2020-10-11 13:13:45,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:45,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715030305] [2020-10-11 13:13:45,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609823659] [2020-10-11 13:13:45,423 INFO L93 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 [2020-10-11 13:13:45,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:45,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:45,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-11 13:13:45,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:45,506 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:45,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:45,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-11 13:13:45,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822141121] [2020-10-11 13:13:45,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:45,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:45,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:45,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:45,520 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-11 13:13:45,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:45,684 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-11 13:13:45,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 13:13:45,684 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-11 13:13:45,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:45,685 INFO L225 Difference]: With dead ends: 62 [2020-10-11 13:13:45,686 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 13:13:45,686 INFO L673 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 [2020-10-11 13:13:45,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 13:13:45,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-11 13:13:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-11 13:13:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-11 13:13:45,692 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-11 13:13:45,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:45,693 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-11 13:13:45,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:45,693 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-11 13:13:45,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:45,694 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:45,694 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:45,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-11 13:13:45,908 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:45,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:45,909 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-11 13:13:45,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:45,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979270985] [2020-10-11 13:13:45,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:45,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979270985] [2020-10-11 13:13:45,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673750042] [2020-10-11 13:13:45,975 INFO L93 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 [2020-10-11 13:13:46,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-11 13:13:46,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:46,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:46,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:46,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:46,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:46,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-11 13:13:46,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572240769] [2020-10-11 13:13:46,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:46,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:46,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:46,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:46,038 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-11 13:13:46,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:46,153 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-11 13:13:46,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 13:13:46,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-11 13:13:46,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:46,155 INFO L225 Difference]: With dead ends: 64 [2020-10-11 13:13:46,155 INFO L226 Difference]: Without dead ends: 58 [2020-10-11 13:13:46,155 INFO L673 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 [2020-10-11 13:13:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-11 13:13:46,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-11 13:13:46,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-11 13:13:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-11 13:13:46,166 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-11 13:13:46,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:46,166 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-11 13:13:46,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:46,167 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-11 13:13:46,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:46,167 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:46,168 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:46,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:46,380 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:46,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:46,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-11 13:13:46,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:46,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603092908] [2020-10-11 13:13:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:46,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603092908] [2020-10-11 13:13:46,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192143319] [2020-10-11 13:13:46,476 INFO L93 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 [2020-10-11 13:13:46,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:46,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:46,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:46,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:46,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:46,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:46,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 13:13:46,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911156629] [2020-10-11 13:13:46,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:46,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:46,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:46,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:46,605 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-11 13:13:46,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:46,753 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-11 13:13:46,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 13:13:46,754 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-11 13:13:46,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:46,755 INFO L225 Difference]: With dead ends: 61 [2020-10-11 13:13:46,755 INFO L226 Difference]: Without dead ends: 55 [2020-10-11 13:13:46,756 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:13:46,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-11 13:13:46,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-11 13:13:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-11 13:13:46,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-11 13:13:46,760 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-11 13:13:46,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:46,760 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-11 13:13:46,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:46,760 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-11 13:13:46,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:46,761 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:46,761 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:46,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:46,971 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:46,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:46,972 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-11 13:13:46,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:46,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371212866] [2020-10-11 13:13:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:47,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371212866] [2020-10-11 13:13:47,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732392424] [2020-10-11 13:13:47,044 INFO L93 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 [2020-10-11 13:13:47,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:47,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:47,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:47,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:47,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:47,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-11 13:13:47,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150626948] [2020-10-11 13:13:47,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-11 13:13:47,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:47,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-11 13:13:47,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-11 13:13:47,143 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-11 13:13:47,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:47,285 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-11 13:13:47,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:47,286 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-11 13:13:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:47,287 INFO L225 Difference]: With dead ends: 77 [2020-10-11 13:13:47,287 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:13:47,287 INFO L673 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 [2020-10-11 13:13:47,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:13:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-11 13:13:47,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-11 13:13:47,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-11 13:13:47,291 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-11 13:13:47,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:47,292 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-11 13:13:47,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-11 13:13:47,292 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-11 13:13:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:47,293 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:47,293 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:47,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-11 13:13:47,503 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:47,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:47,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-11 13:13:47,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:47,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531265981] [2020-10-11 13:13:47,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:47,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531265981] [2020-10-11 13:13:47,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277274787] [2020-10-11 13:13:47,564 INFO L93 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 [2020-10-11 13:13:47,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-11 13:13:47,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:47,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:47,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:47,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:47,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:47,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 13:13:47,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884218912] [2020-10-11 13:13:47,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:47,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:47,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:47,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:47,658 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-11 13:13:47,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:47,857 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-10-11 13:13:47,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:47,857 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-11 13:13:47,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:47,858 INFO L225 Difference]: With dead ends: 58 [2020-10-11 13:13:47,858 INFO L226 Difference]: Without dead ends: 50 [2020-10-11 13:13:47,859 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:13:47,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-11 13:13:47,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-10-11 13:13:47,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-11 13:13:47,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-11 13:13:47,863 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-11 13:13:47,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:47,864 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-11 13:13:47,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:47,864 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-11 13:13:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-11 13:13:47,868 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:47,868 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:48,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:48,069 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:48,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:48,070 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-11 13:13:48,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:48,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340901130] [2020-10-11 13:13:48,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:48,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340901130] [2020-10-11 13:13:48,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516375629] [2020-10-11 13:13:48,120 INFO L93 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 [2020-10-11 13:13:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:48,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-11 13:13:48,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:48,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:48,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:48,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:48,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-11 13:13:48,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85916852] [2020-10-11 13:13:48,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:48,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:48,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:48,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:48,202 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-11 13:13:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:48,358 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-11 13:13:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:48,359 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-11 13:13:48,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:48,360 INFO L225 Difference]: With dead ends: 60 [2020-10-11 13:13:48,360 INFO L226 Difference]: Without dead ends: 55 [2020-10-11 13:13:48,360 INFO L673 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 [2020-10-11 13:13:48,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-11 13:13:48,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-11 13:13:48,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:48,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-11 13:13:48,363 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-11 13:13:48,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:48,363 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-11 13:13:48,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:48,364 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-11 13:13:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:48,364 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:48,364 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:48,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-11 13:13:48,574 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:48,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:48,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-11 13:13:48,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:48,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032513457] [2020-10-11 13:13:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:48,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032513457] [2020-10-11 13:13:48,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035501469] [2020-10-11 13:13:48,632 INFO L93 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 [2020-10-11 13:13:48,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:48,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:48,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:48,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:48,713 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:48,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:48,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:48,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93403410] [2020-10-11 13:13:48,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:48,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:48,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:48,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:48,730 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-11 13:13:48,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:48,936 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-11 13:13:48,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:48,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:48,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:48,937 INFO L225 Difference]: With dead ends: 54 [2020-10-11 13:13:48,937 INFO L226 Difference]: Without dead ends: 49 [2020-10-11 13:13:48,938 INFO L673 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 [2020-10-11 13:13:48,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-11 13:13:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-11 13:13:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-11 13:13:48,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-11 13:13:48,940 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-11 13:13:48,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:48,941 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-11 13:13:48,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:48,941 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-11 13:13:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:48,941 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:48,942 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:49,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-11 13:13:49,142 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:49,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:49,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-11 13:13:49,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:49,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875709297] [2020-10-11 13:13:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:49,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875709297] [2020-10-11 13:13:49,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205492683] [2020-10-11 13:13:49,212 INFO L93 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 [2020-10-11 13:13:49,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 13:13:49,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:49,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:49,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:49,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:49,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-11 13:13:49,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636734556] [2020-10-11 13:13:49,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:49,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:49,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:49,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:49,279 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-11 13:13:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:49,366 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-11 13:13:49,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-11 13:13:49,367 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-11 13:13:49,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:49,368 INFO L225 Difference]: With dead ends: 60 [2020-10-11 13:13:49,368 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 13:13:49,369 INFO L673 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 [2020-10-11 13:13:49,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 13:13:49,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-11 13:13:49,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:49,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-11 13:13:49,373 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-11 13:13:49,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:49,373 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-11 13:13:49,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-11 13:13:49,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:49,374 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:49,374 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:49,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-11 13:13:49,585 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:49,585 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-11 13:13:49,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:49,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707744590] [2020-10-11 13:13:49,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:49,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707744590] [2020-10-11 13:13:49,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536610209] [2020-10-11 13:13:49,672 INFO L93 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 [2020-10-11 13:13:49,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:49,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:49,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:49,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:49,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:49,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:49,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:49,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58734341] [2020-10-11 13:13:49,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:49,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:49,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:49,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:49,784 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-11 13:13:49,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:49,898 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-11 13:13:49,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-11 13:13:49,898 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:49,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:49,899 INFO L225 Difference]: With dead ends: 66 [2020-10-11 13:13:49,899 INFO L226 Difference]: Without dead ends: 60 [2020-10-11 13:13:49,900 INFO L673 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 [2020-10-11 13:13:49,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-11 13:13:49,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-11 13:13:49,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-11 13:13:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-11 13:13:49,902 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-11 13:13:49,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:49,902 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-11 13:13:49,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-11 13:13:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:49,903 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:49,903 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:50,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-11 13:13:50,112 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:50,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:50,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-11 13:13:50,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:50,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756674773] [2020-10-11 13:13:50,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:50,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756674773] [2020-10-11 13:13:50,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915332411] [2020-10-11 13:13:50,172 INFO L93 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 [2020-10-11 13:13:50,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 13:13:50,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:50,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:50,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:50,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:50,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-11 13:13:50,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176498947] [2020-10-11 13:13:50,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:50,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:50,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:50,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:50,236 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-11 13:13:50,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:50,422 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-11 13:13:50,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:50,423 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-11 13:13:50,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:50,424 INFO L225 Difference]: With dead ends: 67 [2020-10-11 13:13:50,424 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:50,425 INFO L673 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 [2020-10-11 13:13:50,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:50,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-11 13:13:50,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-11 13:13:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-11 13:13:50,428 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-11 13:13:50,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:50,428 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-11 13:13:50,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-11 13:13:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:50,429 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:50,429 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:50,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:50,639 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:50,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-11 13:13:50,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:50,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401854181] [2020-10-11 13:13:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:50,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401854181] [2020-10-11 13:13:50,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336946736] [2020-10-11 13:13:50,715 INFO L93 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 [2020-10-11 13:13:50,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 13:13:50,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:50,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:50,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:50,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:50,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:50,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:50,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200621628] [2020-10-11 13:13:50,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:50,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:50,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:50,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:50,821 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-11 13:13:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:51,014 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-11 13:13:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:51,015 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:51,016 INFO L225 Difference]: With dead ends: 69 [2020-10-11 13:13:51,016 INFO L226 Difference]: Without dead ends: 63 [2020-10-11 13:13:51,016 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:13:51,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-11 13:13:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-11 13:13:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:13:51,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-11 13:13:51,019 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-11 13:13:51,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:51,019 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-11 13:13:51,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-11 13:13:51,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:51,020 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:51,020 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:51,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:51,228 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:51,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:51,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-11 13:13:51,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:51,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072890143] [2020-10-11 13:13:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:51,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072890143] [2020-10-11 13:13:51,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627024154] [2020-10-11 13:13:51,279 INFO L93 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 [2020-10-11 13:13:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:51,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:51,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:51,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:51,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-11 13:13:51,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822182220] [2020-10-11 13:13:51,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-11 13:13:51,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:51,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-11 13:13:51,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-11 13:13:51,346 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-11 13:13:51,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:51,528 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-11 13:13:51,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:51,529 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-11 13:13:51,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:51,529 INFO L225 Difference]: With dead ends: 88 [2020-10-11 13:13:51,530 INFO L226 Difference]: Without dead ends: 82 [2020-10-11 13:13:51,530 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:13:51,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-11 13:13:51,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-11 13:13:51,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:51,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-11 13:13:51,533 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-11 13:13:51,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:51,533 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-11 13:13:51,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-11 13:13:51,534 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-11 13:13:51,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-11 13:13:51,534 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:51,534 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:51,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:51,737 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:51,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-11 13:13:51,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:51,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756029099] [2020-10-11 13:13:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:51,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756029099] [2020-10-11 13:13:51,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276484708] [2020-10-11 13:13:51,802 INFO L93 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 [2020-10-11 13:13:51,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:51,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:51,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-11 13:13:51,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:51,869 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:51,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:51,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-11 13:13:51,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360814409] [2020-10-11 13:13:51,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:51,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:51,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:51,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:51,880 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-11 13:13:52,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:52,163 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-11 13:13:52,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:52,164 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-11 13:13:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:52,164 INFO L225 Difference]: With dead ends: 69 [2020-10-11 13:13:52,165 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:52,165 INFO L673 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 [2020-10-11 13:13:52,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:52,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-11 13:13:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-11 13:13:52,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-11 13:13:52,169 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-11 13:13:52,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:52,169 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-11 13:13:52,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:52,169 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-11 13:13:52,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:52,170 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:52,170 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:52,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-11 13:13:52,378 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:52,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-11 13:13:52,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:52,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890719102] [2020-10-11 13:13:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:52,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890719102] [2020-10-11 13:13:52,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860309648] [2020-10-11 13:13:52,456 INFO L93 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 [2020-10-11 13:13:52,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 13:13:52,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:52,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:52,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:52,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:52,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-11 13:13:52,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985951339] [2020-10-11 13:13:52,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:52,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:52,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:52,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:52,521 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-11 13:13:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:52,660 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-11 13:13:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:52,661 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-11 13:13:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:52,662 INFO L225 Difference]: With dead ends: 74 [2020-10-11 13:13:52,662 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:13:52,662 INFO L673 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 [2020-10-11 13:13:52,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:13:52,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-11 13:13:52,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 13:13:52,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-11 13:13:52,665 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-11 13:13:52,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:52,665 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-11 13:13:52,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:52,666 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-11 13:13:52,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:52,666 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:52,666 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:52,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-11 13:13:52,875 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:52,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:52,875 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-11 13:13:52,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:52,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429282376] [2020-10-11 13:13:52,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:52,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429282376] [2020-10-11 13:13:52,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306296486] [2020-10-11 13:13:52,966 INFO L93 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 [2020-10-11 13:13:53,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:53,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:53,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:53,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:53,029 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:53,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:53,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:53,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526344384] [2020-10-11 13:13:53,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:53,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:53,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:53,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:53,041 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-11 13:13:53,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:53,232 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-11 13:13:53,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:53,233 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:53,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:53,234 INFO L225 Difference]: With dead ends: 71 [2020-10-11 13:13:53,234 INFO L226 Difference]: Without dead ends: 65 [2020-10-11 13:13:53,234 INFO L673 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 [2020-10-11 13:13:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-11 13:13:53,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-11 13:13:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-11 13:13:53,238 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-11 13:13:53,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:53,238 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-11 13:13:53,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:53,238 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-11 13:13:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:53,239 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:53,239 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:53,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-11 13:13:53,440 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:53,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-11 13:13:53,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:53,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351505172] [2020-10-11 13:13:53,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:53,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351505172] [2020-10-11 13:13:53,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381219078] [2020-10-11 13:13:53,505 INFO L93 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 [2020-10-11 13:13:53,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-11 13:13:53,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:53,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:53,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:53,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:53,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-11 13:13:53,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992739275] [2020-10-11 13:13:53,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:53,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:53,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:53,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:53,575 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-11 13:13:53,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:53,745 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-11 13:13:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:13:53,745 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-11 13:13:53,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:53,746 INFO L225 Difference]: With dead ends: 68 [2020-10-11 13:13:53,746 INFO L226 Difference]: Without dead ends: 62 [2020-10-11 13:13:53,747 INFO L673 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 [2020-10-11 13:13:53,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-11 13:13:53,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-11 13:13:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 13:13:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-11 13:13:53,749 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-11 13:13:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:53,750 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-11 13:13:53,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-11 13:13:53,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:53,750 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:53,750 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:53,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-11 13:13:53,960 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:53,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:53,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-11 13:13:53,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:53,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242447233] [2020-10-11 13:13:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:54,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242447233] [2020-10-11 13:13:54,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366349601] [2020-10-11 13:13:54,028 INFO L93 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 [2020-10-11 13:13:54,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-11 13:13:54,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:54,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:54,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:54,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:54,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:54,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:54,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920336853] [2020-10-11 13:13:54,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:54,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:54,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:54,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:54,120 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-11 13:13:54,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:54,379 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-11 13:13:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:54,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:54,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:54,380 INFO L225 Difference]: With dead ends: 67 [2020-10-11 13:13:54,381 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:13:54,381 INFO L673 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 [2020-10-11 13:13:54,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:13:54,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-11 13:13:54,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:54,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-11 13:13:54,384 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-11 13:13:54,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:54,385 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-11 13:13:54,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:54,385 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-11 13:13:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:54,385 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:54,385 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:54,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-11 13:13:54,595 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:54,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:54,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-11 13:13:54,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:54,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213608088] [2020-10-11 13:13:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:54,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213608088] [2020-10-11 13:13:54,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868832914] [2020-10-11 13:13:54,671 INFO L93 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 [2020-10-11 13:13:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:54,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:54,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:54,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:54,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:54,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-11 13:13:54,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360822236] [2020-10-11 13:13:54,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-11 13:13:54,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:54,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-11 13:13:54,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-11 13:13:54,733 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-11 13:13:54,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:54,959 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-11 13:13:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:54,959 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-11 13:13:54,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:54,960 INFO L225 Difference]: With dead ends: 83 [2020-10-11 13:13:54,960 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:13:54,961 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:13:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:13:54,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-11 13:13:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:13:54,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-11 13:13:54,963 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-11 13:13:54,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:54,964 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-11 13:13:54,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-11 13:13:54,964 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-11 13:13:54,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:54,964 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:54,964 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:55,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:55,165 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:55,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:55,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-11 13:13:55,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:55,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597730924] [2020-10-11 13:13:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:55,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:55,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597730924] [2020-10-11 13:13:55,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234933365] [2020-10-11 13:13:55,222 INFO L93 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 [2020-10-11 13:13:55,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:55,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:55,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:55,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:55,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:55,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:55,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:55,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81942821] [2020-10-11 13:13:55,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:55,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:55,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:55,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:55,292 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-11 13:13:55,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:55,551 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-11 13:13:55,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:55,551 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:55,552 INFO L225 Difference]: With dead ends: 62 [2020-10-11 13:13:55,552 INFO L226 Difference]: Without dead ends: 54 [2020-10-11 13:13:55,553 INFO L673 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 [2020-10-11 13:13:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-11 13:13:55,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-11 13:13:55,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-11 13:13:55,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-11 13:13:55,555 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-11 13:13:55,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:55,555 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-11 13:13:55,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:55,555 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-11 13:13:55,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-11 13:13:55,556 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:55,556 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:55,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-11 13:13:55,756 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:55,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-11 13:13:55,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:55,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376226707] [2020-10-11 13:13:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:55,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376226707] [2020-10-11 13:13:55,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822951734] [2020-10-11 13:13:55,811 INFO L93 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 [2020-10-11 13:13:55,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-11 13:13:55,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:55,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-11 13:13:55,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:55,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:55,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:55,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-11 13:13:55,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068536681] [2020-10-11 13:13:55,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:55,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:55,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:55,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:55,880 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-11 13:13:56,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:56,132 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-11 13:13:56,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:56,132 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-11 13:13:56,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:56,133 INFO L225 Difference]: With dead ends: 68 [2020-10-11 13:13:56,133 INFO L226 Difference]: Without dead ends: 63 [2020-10-11 13:13:56,134 INFO L673 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 [2020-10-11 13:13:56,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-11 13:13:56,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-11 13:13:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:13:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-11 13:13:56,136 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-11 13:13:56,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:56,136 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-11 13:13:56,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:56,137 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-11 13:13:56,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:56,137 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:56,137 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:56,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-11 13:13:56,347 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:56,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:56,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-11 13:13:56,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:56,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763682555] [2020-10-11 13:13:56,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:56,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763682555] [2020-10-11 13:13:56,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966585207] [2020-10-11 13:13:56,414 INFO L93 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 [2020-10-11 13:13:56,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:13:56,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:56,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:56,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:56,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:13:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:56,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:56,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:56,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124603539] [2020-10-11 13:13:56,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:56,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:56,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:56,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:56,489 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-11 13:13:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:56,772 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-11 13:13:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:56,777 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:56,779 INFO L225 Difference]: With dead ends: 60 [2020-10-11 13:13:56,779 INFO L226 Difference]: Without dead ends: 55 [2020-10-11 13:13:56,779 INFO L673 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 [2020-10-11 13:13:56,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-11 13:13:56,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-11 13:13:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-11 13:13:56,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-11 13:13:56,782 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-11 13:13:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:56,782 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-11 13:13:56,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-11 13:13:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:56,783 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:56,783 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:56,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:56,988 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:56,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-11 13:13:56,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:56,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626969541] [2020-10-11 13:13:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:57,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626969541] [2020-10-11 13:13:57,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39017380] [2020-10-11 13:13:57,082 INFO L93 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 [2020-10-11 13:13:57,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 13:13:57,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:57,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:57,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:57,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:57,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:57,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231201522] [2020-10-11 13:13:57,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:57,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:57,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:57,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:57,158 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-11 13:13:57,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:57,286 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-11 13:13:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-11 13:13:57,287 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:57,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:57,288 INFO L225 Difference]: With dead ends: 66 [2020-10-11 13:13:57,288 INFO L226 Difference]: Without dead ends: 60 [2020-10-11 13:13:57,289 INFO L673 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 [2020-10-11 13:13:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-11 13:13:57,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-11 13:13:57,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:57,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-11 13:13:57,292 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-11 13:13:57,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:57,292 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-11 13:13:57,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:57,292 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-11 13:13:57,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:57,293 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:57,293 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:57,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:57,495 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:57,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:57,495 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-11 13:13:57,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:57,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271727084] [2020-10-11 13:13:57,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:57,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271727084] [2020-10-11 13:13:57,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926565538] [2020-10-11 13:13:57,580 INFO L93 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 [2020-10-11 13:13:57,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 13:13:57,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:57,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:57,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:57,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:57,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:57,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:57,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200351149] [2020-10-11 13:13:57,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:57,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:57,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:57,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:57,650 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-11 13:13:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:57,838 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-11 13:13:57,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-11 13:13:57,839 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:57,839 INFO L225 Difference]: With dead ends: 74 [2020-10-11 13:13:57,840 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:13:57,840 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:13:57,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:13:57,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-11 13:13:57,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-11 13:13:57,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-11 13:13:57,843 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-11 13:13:57,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:57,843 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-11 13:13:57,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:57,843 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-11 13:13:57,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:57,844 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:57,844 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:58,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-11 13:13:58,045 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:58,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:58,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-11 13:13:58,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:58,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568438244] [2020-10-11 13:13:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:58,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568438244] [2020-10-11 13:13:58,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205522456] [2020-10-11 13:13:58,120 INFO L93 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 [2020-10-11 13:13:58,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:58,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:58,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:58,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:58,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:58,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517547750] [2020-10-11 13:13:58,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:58,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:58,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:58,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:58,170 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-11 13:13:58,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:58,346 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-11 13:13:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:13:58,347 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:58,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:58,347 INFO L225 Difference]: With dead ends: 75 [2020-10-11 13:13:58,348 INFO L226 Difference]: Without dead ends: 69 [2020-10-11 13:13:58,348 INFO L673 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 [2020-10-11 13:13:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-11 13:13:58,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-11 13:13:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-11 13:13:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-11 13:13:58,352 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-11 13:13:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:58,352 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-11 13:13:58,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-11 13:13:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:58,353 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:58,353 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:58,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:58,556 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:58,556 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-11 13:13:58,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:58,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538454233] [2020-10-11 13:13:58,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:58,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538454233] [2020-10-11 13:13:58,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585735243] [2020-10-11 13:13:58,634 INFO L93 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 [2020-10-11 13:13:58,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:13:58,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:58,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:58,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:58,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:13:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:58,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:58,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:13:58,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919387681] [2020-10-11 13:13:58,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:13:58,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:58,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:13:58,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:13:58,705 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-11 13:13:58,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:58,942 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-11 13:13:58,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:13:58,943 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:13:58,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:58,943 INFO L225 Difference]: With dead ends: 79 [2020-10-11 13:13:58,944 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:13:58,944 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:13:58,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:13:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-11 13:13:58,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:13:58,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-11 13:13:58,947 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-11 13:13:58,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:58,947 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-11 13:13:58,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:13:58,947 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-11 13:13:58,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:58,948 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:58,948 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:59,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-11 13:13:59,156 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:59,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:59,157 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-11 13:13:59,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:59,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102798315] [2020-10-11 13:13:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:59,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102798315] [2020-10-11 13:13:59,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974428617] [2020-10-11 13:13:59,255 INFO L93 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 [2020-10-11 13:13:59,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 13:13:59,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:13:59,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:13:59,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:13:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:59,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:13:59,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:13:59,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319462094] [2020-10-11 13:13:59,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:13:59,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:13:59,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:13:59,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:13:59,349 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-11 13:13:59,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:13:59,624 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-11 13:13:59,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:13:59,624 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:13:59,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:13:59,625 INFO L225 Difference]: With dead ends: 79 [2020-10-11 13:13:59,625 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:13:59,626 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:13:59,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:13:59,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-11 13:13:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-11 13:13:59,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-11 13:13:59,628 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-11 13:13:59,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:13:59,629 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-11 13:13:59,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:13:59,629 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-11 13:13:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:13:59,629 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:13:59,629 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:13:59,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:13:59,838 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:13:59,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:13:59,839 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-11 13:13:59,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:13:59,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472434994] [2020-10-11 13:13:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:13:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:13:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:13:59,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472434994] [2020-10-11 13:13:59,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987054005] [2020-10-11 13:13:59,959 INFO L93 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 [2020-10-11 13:14:00,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:00,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:00,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:14:00,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:00,050 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:00,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:00,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:00,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:14:00,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95026120] [2020-10-11 13:14:00,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:14:00,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:00,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:14:00,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:14:00,067 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-11 13:14:00,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:00,462 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-11 13:14:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:14:00,463 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:14:00,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:00,464 INFO L225 Difference]: With dead ends: 76 [2020-10-11 13:14:00,464 INFO L226 Difference]: Without dead ends: 70 [2020-10-11 13:14:00,465 INFO L673 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 [2020-10-11 13:14:00,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-11 13:14:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-11 13:14:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:14:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-11 13:14:00,469 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-11 13:14:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:00,469 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-11 13:14:00,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:14:00,469 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-11 13:14:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:14:00,470 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:00,470 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:00,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-11 13:14:00,682 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:00,683 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-11 13:14:00,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:00,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057279236] [2020-10-11 13:14:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:00,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057279236] [2020-10-11 13:14:00,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752425167] [2020-10-11 13:14:00,776 INFO L93 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 [2020-10-11 13:14:00,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 13:14:00,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:00,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:14:00,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:00,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:00,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-11 13:14:00,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893063677] [2020-10-11 13:14:00,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-11 13:14:00,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:00,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-11 13:14:00,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-11 13:14:00,870 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-11 13:14:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:01,142 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-11 13:14:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:14:01,142 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-11 13:14:01,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:01,143 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:14:01,143 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 13:14:01,144 INFO L673 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 [2020-10-11 13:14:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 13:14:01,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-11 13:14:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:14:01,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-11 13:14:01,147 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-11 13:14:01,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:01,147 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-11 13:14:01,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-11 13:14:01,148 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-11 13:14:01,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-11 13:14:01,148 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:01,148 INFO L421 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:01,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-11 13:14:01,359 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:01,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:01,360 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-11 13:14:01,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:01,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291366814] [2020-10-11 13:14:01,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:01,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291366814] [2020-10-11 13:14:01,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129492503] [2020-10-11 13:14:01,423 INFO L93 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 [2020-10-11 13:14:01,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 13:14:01,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:01,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-11 13:14:01,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:01,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:01,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:01,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-11 13:14:01,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174095571] [2020-10-11 13:14:01,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:14:01,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:01,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:14:01,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:14:01,509 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-11 13:14:01,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:01,845 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-11 13:14:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:14:01,846 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-11 13:14:01,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:01,847 INFO L225 Difference]: With dead ends: 77 [2020-10-11 13:14:01,847 INFO L226 Difference]: Without dead ends: 69 [2020-10-11 13:14:01,848 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:14:01,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-11 13:14:01,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-11 13:14:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-11 13:14:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-11 13:14:01,851 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-11 13:14:01,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:01,851 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-11 13:14:01,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:14:01,852 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-11 13:14:01,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:14:01,852 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:01,852 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:02,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-11 13:14:02,062 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:02,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:02,062 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-11 13:14:02,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:02,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285001767] [2020-10-11 13:14:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:02,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285001767] [2020-10-11 13:14:02,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728531371] [2020-10-11 13:14:02,159 INFO L93 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 [2020-10-11 13:14:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:02,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:14:02,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:02,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:02,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:14:02,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547711289] [2020-10-11 13:14:02,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:14:02,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:02,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:14:02,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:14:02,238 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-11 13:14:02,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:02,399 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-11 13:14:02,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:14:02,399 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:14:02,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:02,400 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:14:02,400 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:14:02,401 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:14:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:14:02,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-11 13:14:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:14:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:14:02,405 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-11 13:14:02,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:02,405 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:14:02,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:14:02,405 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:14:02,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:14:02,406 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:02,406 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:02,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-11 13:14:02,615 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:02,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:02,615 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-11 13:14:02,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:02,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483088080] [2020-10-11 13:14:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:02,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483088080] [2020-10-11 13:14:02,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195363186] [2020-10-11 13:14:02,715 INFO L93 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 [2020-10-11 13:14:02,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:02,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:02,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:14:02,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:02,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:02,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:02,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:14:02,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652038245] [2020-10-11 13:14:02,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:14:02,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:02,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:14:02,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:14:02,829 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-11 13:14:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:03,132 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-11 13:14:03,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:14:03,133 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:14:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:03,134 INFO L225 Difference]: With dead ends: 81 [2020-10-11 13:14:03,135 INFO L226 Difference]: Without dead ends: 75 [2020-10-11 13:14:03,135 INFO L673 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 [2020-10-11 13:14:03,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-11 13:14:03,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-11 13:14:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:14:03,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:14:03,139 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-11 13:14:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:03,139 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:14:03,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:14:03,140 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:14:03,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:14:03,140 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:03,141 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:03,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-11 13:14:03,351 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:03,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:03,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-11 13:14:03,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:03,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9407755] [2020-10-11 13:14:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:03,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9407755] [2020-10-11 13:14:03,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198066527] [2020-10-11 13:14:03,435 INFO L93 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 [2020-10-11 13:14:03,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 13:14:03,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:03,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:14:03,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:03,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:03,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:14:03,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501444432] [2020-10-11 13:14:03,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:14:03,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:03,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:14:03,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:14:03,492 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-11 13:14:03,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:03,704 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-11 13:14:03,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:14:03,705 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:14:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:03,706 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:14:03,706 INFO L226 Difference]: Without dead ends: 72 [2020-10-11 13:14:03,706 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:14:03,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-11 13:14:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-11 13:14:03,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:14:03,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:14:03,709 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-11 13:14:03,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:03,709 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:14:03,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:14:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:14:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:14:03,710 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:03,710 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:03,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-11 13:14:03,919 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:03,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:03,919 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-11 13:14:03,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:03,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570336595] [2020-10-11 13:14:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:04,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570336595] [2020-10-11 13:14:04,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751862915] [2020-10-11 13:14:04,005 INFO L93 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 [2020-10-11 13:14:04,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:04,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:04,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:14:04,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:04,065 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:04,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:04,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:14:04,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068325832] [2020-10-11 13:14:04,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:14:04,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:04,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:14:04,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:14:04,077 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-11 13:14:04,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:04,395 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-11 13:14:04,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:14:04,396 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:14:04,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:04,397 INFO L225 Difference]: With dead ends: 77 [2020-10-11 13:14:04,397 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:14:04,398 INFO L673 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 [2020-10-11 13:14:04,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:14:04,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-11 13:14:04,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:14:04,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:14:04,400 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-11 13:14:04,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:04,400 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:14:04,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:14:04,401 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:14:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:14:04,401 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:04,401 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:04,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-11 13:14:04,609 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-11 13:14:04,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:04,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401533291] [2020-10-11 13:14:04,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:04,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401533291] [2020-10-11 13:14:04,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588153996] [2020-10-11 13:14:04,685 INFO L93 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 [2020-10-11 13:14:04,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-11 13:14:04,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:04,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:14:04,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:04,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:04,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:14:04,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111245492] [2020-10-11 13:14:04,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:14:04,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:04,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:14:04,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:14:04,749 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-11 13:14:05,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:05,006 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-11 13:14:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:14:05,009 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:14:05,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:05,010 INFO L225 Difference]: With dead ends: 74 [2020-10-11 13:14:05,010 INFO L226 Difference]: Without dead ends: 68 [2020-10-11 13:14:05,011 INFO L673 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 [2020-10-11 13:14:05,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-11 13:14:05,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-11 13:14:05,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:14:05,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:14:05,013 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-11 13:14:05,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:05,013 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:14:05,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:14:05,013 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:14:05,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:14:05,014 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:05,014 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:05,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:05,215 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:05,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:05,216 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-11 13:14:05,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:05,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061134104] [2020-10-11 13:14:05,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:05,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061134104] [2020-10-11 13:14:05,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397712211] [2020-10-11 13:14:05,292 INFO L93 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 [2020-10-11 13:14:05,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-11 13:14:05,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:05,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:14:05,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:05,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:05,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:05,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:14:05,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618563144] [2020-10-11 13:14:05,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:14:05,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:05,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:14:05,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:14:05,364 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-11 13:14:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:05,726 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-11 13:14:05,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:14:05,733 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:14:05,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:05,734 INFO L225 Difference]: With dead ends: 73 [2020-10-11 13:14:05,734 INFO L226 Difference]: Without dead ends: 67 [2020-10-11 13:14:05,735 INFO L673 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 [2020-10-11 13:14:05,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-11 13:14:05,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-11 13:14:05,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:14:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:14:05,738 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-11 13:14:05,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:05,738 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:14:05,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:14:05,739 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:14:05,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:14:05,739 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:05,739 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:05,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-11 13:14:05,947 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:05,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:05,948 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-11 13:14:05,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:05,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554471752] [2020-10-11 13:14:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:06,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554471752] [2020-10-11 13:14:06,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458754012] [2020-10-11 13:14:06,020 INFO L93 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 [2020-10-11 13:14:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:06,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:14:06,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:06,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:06,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-11 13:14:06,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025534575] [2020-10-11 13:14:06,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-11 13:14:06,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:06,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-11 13:14:06,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-11 13:14:06,088 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-11 13:14:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:06,368 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-11 13:14:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:14:06,368 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-11 13:14:06,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:06,370 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:14:06,370 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:14:06,371 INFO L673 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 [2020-10-11 13:14:06,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:14:06,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-11 13:14:06,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-11 13:14:06,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-11 13:14:06,373 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-11 13:14:06,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:06,374 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-11 13:14:06,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-11 13:14:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-11 13:14:06,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:14:06,374 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:06,374 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:06,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:06,583 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:06,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:06,583 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-11 13:14:06,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:06,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418714065] [2020-10-11 13:14:06,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:06,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418714065] [2020-10-11 13:14:06,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023981412] [2020-10-11 13:14:06,652 INFO L93 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 [2020-10-11 13:14:06,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:06,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:06,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:14:06,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:06,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:06,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:14:06,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689097735] [2020-10-11 13:14:06,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:14:06,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:06,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:14:06,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:14:06,746 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-11 13:14:07,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:07,040 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-10-11 13:14:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:14:07,041 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:14:07,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:07,042 INFO L225 Difference]: With dead ends: 68 [2020-10-11 13:14:07,042 INFO L226 Difference]: Without dead ends: 60 [2020-10-11 13:14:07,043 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:14:07,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-11 13:14:07,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-10-11 13:14:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-11 13:14:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-11 13:14:07,045 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-11 13:14:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:07,045 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-11 13:14:07,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:14:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-11 13:14:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-11 13:14:07,046 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:07,046 INFO L421 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:07,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-11 13:14:07,253 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:07,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:07,253 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-11 13:14:07,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:07,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603461477] [2020-10-11 13:14:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:07,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603461477] [2020-10-11 13:14:07,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018110130] [2020-10-11 13:14:07,331 INFO L93 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 [2020-10-11 13:14:07,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-11 13:14:07,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:07,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-11 13:14:07,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:07,411 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:14:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:07,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:07,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-11 13:14:07,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812892712] [2020-10-11 13:14:07,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:14:07,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:07,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:14:07,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:14:07,425 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-11 13:14:07,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:07,805 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-11 13:14:07,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:14:07,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-11 13:14:07,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:07,807 INFO L225 Difference]: With dead ends: 76 [2020-10-11 13:14:07,807 INFO L226 Difference]: Without dead ends: 71 [2020-10-11 13:14:07,808 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:14:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-11 13:14:07,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-11 13:14:07,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:14:07,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-11 13:14:07,811 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-11 13:14:07,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:07,811 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-11 13:14:07,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:14:07,811 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-11 13:14:07,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:14:07,812 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:07,812 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:08,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:08,019 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:08,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:08,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-11 13:14:08,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:08,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034630106] [2020-10-11 13:14:08,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:08,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034630106] [2020-10-11 13:14:08,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803786615] [2020-10-11 13:14:08,102 INFO L93 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 [2020-10-11 13:14:08,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:08,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:08,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:14:08,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:08,174 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:14:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:08,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:08,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:14:08,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261059956] [2020-10-11 13:14:08,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:14:08,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:08,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:14:08,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:14:08,188 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-11 13:14:08,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:08,585 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-11 13:14:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:14:08,586 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:14:08,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:08,587 INFO L225 Difference]: With dead ends: 66 [2020-10-11 13:14:08,587 INFO L226 Difference]: Without dead ends: 61 [2020-10-11 13:14:08,588 INFO L673 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 [2020-10-11 13:14:08,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-11 13:14:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-11 13:14:08,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-11 13:14:08,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-11 13:14:08,590 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-11 13:14:08,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:08,590 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-11 13:14:08,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:14:08,590 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-11 13:14:08,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:14:08,590 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:08,591 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:08,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-11 13:14:08,793 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:08,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:08,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-11 13:14:08,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:08,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468312224] [2020-10-11 13:14:08,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:08,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468312224] [2020-10-11 13:14:08,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809590092] [2020-10-11 13:14:08,887 INFO L93 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 [2020-10-11 13:14:08,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:14:08,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:08,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:14:08,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:08,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:08,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:14:08,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157595012] [2020-10-11 13:14:08,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:14:08,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:08,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:14:08,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:14:08,941 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-11 13:14:09,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:09,116 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-11 13:14:09,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-11 13:14:09,117 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:14:09,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:09,118 INFO L225 Difference]: With dead ends: 72 [2020-10-11 13:14:09,118 INFO L226 Difference]: Without dead ends: 66 [2020-10-11 13:14:09,119 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:14:09,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-11 13:14:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-11 13:14:09,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:14:09,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-11 13:14:09,121 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-11 13:14:09,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:09,122 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-11 13:14:09,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:14:09,122 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-11 13:14:09,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:14:09,122 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:09,122 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:09,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-11 13:14:09,326 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:09,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:09,326 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-11 13:14:09,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:09,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869318221] [2020-10-11 13:14:09,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:09,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869318221] [2020-10-11 13:14:09,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072619055] [2020-10-11 13:14:09,430 INFO L93 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 [2020-10-11 13:14:09,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:14:09,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:09,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:14:09,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:09,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:09,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:09,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:14:09,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591795381] [2020-10-11 13:14:09,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:14:09,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:09,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:14:09,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:14:09,503 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-11 13:14:09,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:09,728 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-11 13:14:09,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-11 13:14:09,729 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:14:09,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:09,730 INFO L225 Difference]: With dead ends: 82 [2020-10-11 13:14:09,730 INFO L226 Difference]: Without dead ends: 76 [2020-10-11 13:14:09,731 INFO L673 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 [2020-10-11 13:14:09,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-11 13:14:09,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-11 13:14:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-11 13:14:09,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-11 13:14:09,734 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-11 13:14:09,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:09,734 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-11 13:14:09,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:14:09,735 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-11 13:14:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:14:09,735 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:09,736 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:09,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-11 13:14:09,936 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:09,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:09,937 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-11 13:14:09,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:09,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940614255] [2020-10-11 13:14:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:10,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940614255] [2020-10-11 13:14:10,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191495738] [2020-10-11 13:14:10,034 INFO L93 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 [2020-10-11 13:14:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:10,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:14:10,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:10,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:10,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:10,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:14:10,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504859949] [2020-10-11 13:14:10,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:14:10,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:10,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:14:10,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:14:10,104 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-11 13:14:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:10,359 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-11 13:14:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:14:10,360 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:14:10,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:10,361 INFO L225 Difference]: With dead ends: 83 [2020-10-11 13:14:10,362 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:14:10,362 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:14:10,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:14:10,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-11 13:14:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-11 13:14:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-11 13:14:10,364 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-11 13:14:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:10,364 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-11 13:14:10,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:14:10,365 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-11 13:14:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:14:10,365 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:10,365 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:10,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-11 13:14:10,576 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:10,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:10,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-11 13:14:10,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:10,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637473156] [2020-10-11 13:14:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:10,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637473156] [2020-10-11 13:14:10,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039242997] [2020-10-11 13:14:10,684 INFO L93 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 [2020-10-11 13:14:10,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:10,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:10,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:14:10,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:10,751 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:10,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:10,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:14:10,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444024062] [2020-10-11 13:14:10,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:14:10,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:10,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:14:10,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:14:10,763 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-11 13:14:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:11,031 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-11 13:14:11,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:14:11,033 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:14:11,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:11,034 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:14:11,034 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:14:11,034 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:14:11,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:14:11,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-11 13:14:11,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:14:11,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-11 13:14:11,036 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-11 13:14:11,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:11,037 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-11 13:14:11,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:14:11,037 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-11 13:14:11,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:14:11,038 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:11,039 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:11,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:11,239 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:11,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:11,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-11 13:14:11,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:11,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613040411] [2020-10-11 13:14:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:11,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613040411] [2020-10-11 13:14:11,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242565547] [2020-10-11 13:14:11,331 INFO L93 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 [2020-10-11 13:14:11,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 13:14:11,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:11,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:14:11,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:11,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:11,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:14:11,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796333297] [2020-10-11 13:14:11,396 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:14:11,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:11,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:14:11,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:14:11,397 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-11 13:14:11,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:11,676 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-11 13:14:11,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:14:11,677 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:14:11,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:11,677 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:14:11,678 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:14:11,678 INFO L673 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 [2020-10-11 13:14:11,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:14:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-11 13:14:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:14:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-11 13:14:11,684 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-11 13:14:11,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:11,684 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-11 13:14:11,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:14:11,684 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-11 13:14:11,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:14:11,685 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:11,685 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:11,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:11,892 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:11,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-11 13:14:11,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:11,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872473492] [2020-10-11 13:14:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:11,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872473492] [2020-10-11 13:14:11,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383964273] [2020-10-11 13:14:11,990 INFO L93 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 [2020-10-11 13:14:12,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:12,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:12,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:14:12,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:12,056 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:12,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:12,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:14:12,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850791722] [2020-10-11 13:14:12,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:14:12,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:12,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:14:12,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:14:12,067 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-11 13:14:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:12,424 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-11 13:14:12,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:14:12,424 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:14:12,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:12,425 INFO L225 Difference]: With dead ends: 86 [2020-10-11 13:14:12,426 INFO L226 Difference]: Without dead ends: 80 [2020-10-11 13:14:12,426 INFO L673 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 [2020-10-11 13:14:12,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-11 13:14:12,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-11 13:14:12,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:14:12,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-11 13:14:12,429 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-11 13:14:12,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:12,429 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-11 13:14:12,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:14:12,429 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-11 13:14:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:14:12,430 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:12,430 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:12,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-11 13:14:12,633 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:12,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:12,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-11 13:14:12,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:12,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531700867] [2020-10-11 13:14:12,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:12,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531700867] [2020-10-11 13:14:12,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167431890] [2020-10-11 13:14:12,717 INFO L93 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 [2020-10-11 13:14:12,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:14:12,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:12,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:14:12,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:12,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:12,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:12,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:14:12,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485269429] [2020-10-11 13:14:12,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:14:12,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:12,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:14:12,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:14:12,873 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-11 13:14:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:13,165 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-11 13:14:13,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:14:13,167 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:14:13,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:13,168 INFO L225 Difference]: With dead ends: 87 [2020-10-11 13:14:13,168 INFO L226 Difference]: Without dead ends: 81 [2020-10-11 13:14:13,168 INFO L673 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 [2020-10-11 13:14:13,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-11 13:14:13,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-11 13:14:13,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-11 13:14:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-11 13:14:13,170 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-11 13:14:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:13,170 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-11 13:14:13,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:14:13,170 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-11 13:14:13,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:14:13,171 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:13,171 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:13,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:13,372 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:13,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-11 13:14:13,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:13,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975869911] [2020-10-11 13:14:13,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:13,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975869911] [2020-10-11 13:14:13,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486684406] [2020-10-11 13:14:13,453 INFO L93 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 [2020-10-11 13:14:13,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:14:13,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:13,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:14:13,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:13,546 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:13,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:13,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:14:13,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549143909] [2020-10-11 13:14:13,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:14:13,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:13,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:14:13,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:14:13,562 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-11 13:14:13,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:13,978 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-11 13:14:13,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:14:13,978 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:14:13,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:13,979 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:14:13,979 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:14:13,980 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:14:13,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:14:13,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-11 13:14:13,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:14:13,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-11 13:14:13,983 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-11 13:14:13,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:13,983 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-11 13:14:13,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:14:13,984 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-11 13:14:13,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:14:13,984 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:13,984 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:14,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-11 13:14:14,193 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:14,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:14,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-11 13:14:14,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:14,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288411882] [2020-10-11 13:14:14,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:14,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288411882] [2020-10-11 13:14:14,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051470108] [2020-10-11 13:14:14,267 INFO L93 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 [2020-10-11 13:14:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:14,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:14:14,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:14,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:14,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-11 13:14:14,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828462342] [2020-10-11 13:14:14,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-11 13:14:14,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:14,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-11 13:14:14,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-11 13:14:14,323 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-11 13:14:14,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:14,678 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-11 13:14:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:14,678 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-11 13:14:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:14,679 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:14:14,680 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:14:14,680 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:14:14,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:14:14,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-11 13:14:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:14:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-11 13:14:14,683 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-11 13:14:14,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:14,683 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-11 13:14:14,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-11 13:14:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-11 13:14:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-11 13:14:14,683 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:14,684 INFO L421 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:14,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-11 13:14:14,884 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:14,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:14,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-11 13:14:14,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:14,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175642562] [2020-10-11 13:14:14,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:14,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175642562] [2020-10-11 13:14:14,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558822612] [2020-10-11 13:14:14,962 INFO L93 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 [2020-10-11 13:14:15,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:15,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:15,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-11 13:14:15,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:15,027 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:15,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:15,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-11 13:14:15,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129645580] [2020-10-11 13:14:15,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:14:15,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:15,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:14:15,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:14:15,038 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-11 13:14:15,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:15,487 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-11 13:14:15,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:14:15,488 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-11 13:14:15,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:15,489 INFO L225 Difference]: With dead ends: 85 [2020-10-11 13:14:15,489 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:14:15,489 INFO L673 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 [2020-10-11 13:14:15,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:14:15,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-11 13:14:15,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-11 13:14:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-11 13:14:15,492 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-11 13:14:15,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:15,493 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-11 13:14:15,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:14:15,493 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-11 13:14:15,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:15,493 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:15,493 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:15,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-11 13:14:15,697 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:15,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:15,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-11 13:14:15,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:15,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131186470] [2020-10-11 13:14:15,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:15,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131186470] [2020-10-11 13:14:15,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546776451] [2020-10-11 13:14:15,815 INFO L93 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 [2020-10-11 13:14:15,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 13:14:15,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:15,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:15,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:15,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:15,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:14:15,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531726298] [2020-10-11 13:14:15,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:14:15,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:15,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:14:15,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:14:15,891 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-11 13:14:16,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:16,153 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-11 13:14:16,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:14:16,153 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:14:16,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:16,154 INFO L225 Difference]: With dead ends: 94 [2020-10-11 13:14:16,154 INFO L226 Difference]: Without dead ends: 88 [2020-10-11 13:14:16,155 INFO L673 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 [2020-10-11 13:14:16,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-11 13:14:16,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-11 13:14:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:14:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:14:16,157 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-11 13:14:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:16,157 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:14:16,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:14:16,157 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:14:16,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:16,158 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:16,158 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:16,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-11 13:14:16,367 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:16,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-11 13:14:16,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:16,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332131557] [2020-10-11 13:14:16,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:16,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332131557] [2020-10-11 13:14:16,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843896594] [2020-10-11 13:14:16,491 INFO L93 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 [2020-10-11 13:14:16,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:16,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:16,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:16,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:16,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:16,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:16,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:14:16,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565630351] [2020-10-11 13:14:16,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:16,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:16,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:16,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:16,563 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-11 13:14:16,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:16,843 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-11 13:14:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:14:16,844 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:14:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:16,844 INFO L225 Difference]: With dead ends: 91 [2020-10-11 13:14:16,845 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 13:14:16,845 INFO L673 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 [2020-10-11 13:14:16,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 13:14:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-11 13:14:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:14:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:14:16,847 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-11 13:14:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:16,848 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:14:16,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:14:16,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:16,848 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:16,849 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:17,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-11 13:14:17,057 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:17,057 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-11 13:14:17,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:17,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280509125] [2020-10-11 13:14:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:17,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:17,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280509125] [2020-10-11 13:14:17,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279299703] [2020-10-11 13:14:17,157 INFO L93 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 [2020-10-11 13:14:17,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:14:17,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:17,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:17,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:17,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:17,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:14:17,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252875630] [2020-10-11 13:14:17,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:14:17,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:17,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:14:17,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:14:17,225 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-11 13:14:17,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:17,480 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-11 13:14:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:14:17,481 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:14:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:17,482 INFO L225 Difference]: With dead ends: 88 [2020-10-11 13:14:17,482 INFO L226 Difference]: Without dead ends: 82 [2020-10-11 13:14:17,482 INFO L673 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 [2020-10-11 13:14:17,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-11 13:14:17,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-11 13:14:17,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:14:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:14:17,485 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-11 13:14:17,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:17,485 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:14:17,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:14:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:14:17,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:17,486 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:17,486 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:17,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:17,695 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:17,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:17,695 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-11 13:14:17,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:17,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777071067] [2020-10-11 13:14:17,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:17,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777071067] [2020-10-11 13:14:17,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988706059] [2020-10-11 13:14:17,796 INFO L93 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 [2020-10-11 13:14:17,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:14:17,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:17,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:17,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:17,879 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:17,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:17,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:14:17,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579082524] [2020-10-11 13:14:17,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:17,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:17,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:17,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:17,896 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-11 13:14:18,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:18,240 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-11 13:14:18,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:14:18,240 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:14:18,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:18,242 INFO L225 Difference]: With dead ends: 87 [2020-10-11 13:14:18,242 INFO L226 Difference]: Without dead ends: 81 [2020-10-11 13:14:18,242 INFO L673 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 [2020-10-11 13:14:18,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-11 13:14:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-11 13:14:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:14:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:14:18,246 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-11 13:14:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:18,246 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:14:18,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:18,246 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:14:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:18,247 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:18,247 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:18,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:18,456 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:18,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:18,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-11 13:14:18,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:18,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202457125] [2020-10-11 13:14:18,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:18,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202457125] [2020-10-11 13:14:18,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582374925] [2020-10-11 13:14:18,574 INFO L93 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 [2020-10-11 13:14:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:18,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:18,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:18,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:18,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:18,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:14:18,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725249217] [2020-10-11 13:14:18,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:14:18,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:18,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:14:18,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:14:18,648 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-11 13:14:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:18,956 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-11 13:14:18,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:14:18,956 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:14:18,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:18,957 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:14:18,957 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:14:18,958 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:14:18,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:14:18,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-11 13:14:18,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:14:18,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:14:18,960 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-11 13:14:18,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:18,960 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:14:18,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:14:18,960 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:14:18,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:18,961 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:18,961 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:19,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-11 13:14:19,164 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:19,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:19,164 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-11 13:14:19,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:19,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284707484] [2020-10-11 13:14:19,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:19,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284707484] [2020-10-11 13:14:19,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684343729] [2020-10-11 13:14:19,256 INFO L93 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 [2020-10-11 13:14:19,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:19,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:19,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:19,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:19,324 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:19,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:19,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:14:19,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812175683] [2020-10-11 13:14:19,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:19,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:19,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:19,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:19,336 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-11 13:14:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:19,750 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-11 13:14:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:14:19,751 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:14:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:19,752 INFO L225 Difference]: With dead ends: 83 [2020-10-11 13:14:19,752 INFO L226 Difference]: Without dead ends: 77 [2020-10-11 13:14:19,752 INFO L673 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 [2020-10-11 13:14:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-11 13:14:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-11 13:14:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:14:19,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:14:19,755 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-11 13:14:19,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:19,755 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:14:19,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:19,755 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:14:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:19,755 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:19,756 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:19,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:19,958 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:19,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:19,958 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-11 13:14:19,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:19,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557683695] [2020-10-11 13:14:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:20,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:20,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557683695] [2020-10-11 13:14:20,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24242182] [2020-10-11 13:14:20,052 INFO L93 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 [2020-10-11 13:14:20,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-11 13:14:20,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:20,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:20,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:20,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:20,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:14:20,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339181169] [2020-10-11 13:14:20,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:14:20,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:20,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:14:20,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:14:20,110 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-11 13:14:20,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:20,455 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-11 13:14:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:14:20,456 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:14:20,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:20,457 INFO L225 Difference]: With dead ends: 80 [2020-10-11 13:14:20,457 INFO L226 Difference]: Without dead ends: 74 [2020-10-11 13:14:20,457 INFO L673 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 [2020-10-11 13:14:20,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-11 13:14:20,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-11 13:14:20,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:14:20,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:14:20,460 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-11 13:14:20,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:20,460 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:14:20,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:14:20,461 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:14:20,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:20,461 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:20,461 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:20,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-11 13:14:20,670 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:20,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:20,670 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-11 13:14:20,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:20,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556853266] [2020-10-11 13:14:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:20,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556853266] [2020-10-11 13:14:20,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673093421] [2020-10-11 13:14:20,772 INFO L93 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 [2020-10-11 13:14:20,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:20,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:20,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:20,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:20,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:20,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:20,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:14:20,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419035377] [2020-10-11 13:14:20,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:20,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:20,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:20,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:20,856 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-11 13:14:21,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:21,361 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-11 13:14:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:14:21,362 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:14:21,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:21,363 INFO L225 Difference]: With dead ends: 79 [2020-10-11 13:14:21,363 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:14:21,363 INFO L673 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 [2020-10-11 13:14:21,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:14:21,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-11 13:14:21,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:14:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:14:21,366 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-11 13:14:21,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:21,366 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:14:21,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:21,366 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:14:21,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:21,367 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:21,367 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:21,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:21,570 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:21,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:21,570 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-11 13:14:21,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:21,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759661525] [2020-10-11 13:14:21,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:21,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759661525] [2020-10-11 13:14:21,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745006334] [2020-10-11 13:14:21,674 INFO L93 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 [2020-10-11 13:14:21,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-11 13:14:21,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:21,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:21,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:21,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:21,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-11 13:14:21,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020254501] [2020-10-11 13:14:21,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-11 13:14:21,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:21,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-11 13:14:21,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-11 13:14:21,736 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-11 13:14:22,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:22,132 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-11 13:14:22,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:22,133 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-11 13:14:22,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:22,134 INFO L225 Difference]: With dead ends: 95 [2020-10-11 13:14:22,134 INFO L226 Difference]: Without dead ends: 89 [2020-10-11 13:14:22,134 INFO L673 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 [2020-10-11 13:14:22,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-11 13:14:22,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-11 13:14:22,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 13:14:22,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-11 13:14:22,136 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-11 13:14:22,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:22,137 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-11 13:14:22,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-11 13:14:22,137 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-11 13:14:22,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:22,137 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:22,137 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:22,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-11 13:14:22,338 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:22,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:22,339 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-11 13:14:22,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:22,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503490142] [2020-10-11 13:14:22,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:22,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503490142] [2020-10-11 13:14:22,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706943488] [2020-10-11 13:14:22,428 INFO L93 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 [2020-10-11 13:14:22,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-11 13:14:22,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:22,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:22,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:22,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:22,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:14:22,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276016404] [2020-10-11 13:14:22,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:22,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:22,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:22,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:22,508 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-11 13:14:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:22,974 INFO L93 Difference]: Finished difference Result 74 states and 181 transitions. [2020-10-11 13:14:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:14:22,974 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:14:22,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:22,975 INFO L225 Difference]: With dead ends: 74 [2020-10-11 13:14:22,975 INFO L226 Difference]: Without dead ends: 66 [2020-10-11 13:14:22,975 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 13:14:22,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-11 13:14:22,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2020-10-11 13:14:22,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-11 13:14:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-11 13:14:22,978 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-11 13:14:22,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:22,978 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-11 13:14:22,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:22,978 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-11 13:14:22,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-11 13:14:22,978 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:22,978 INFO L421 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:23,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:23,179 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:23,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:23,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-11 13:14:23,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:23,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223841403] [2020-10-11 13:14:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:23,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223841403] [2020-10-11 13:14:23,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422535900] [2020-10-11 13:14:23,275 INFO L93 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 [2020-10-11 13:14:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:23,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-11 13:14:23,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:23,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:14:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:23,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:23,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-11 13:14:23,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446877676] [2020-10-11 13:14:23,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:23,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:23,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:23,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:23,362 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-11 13:14:23,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:23,826 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-11 13:14:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:23,826 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-11 13:14:23,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:23,827 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:14:23,827 INFO L226 Difference]: Without dead ends: 79 [2020-10-11 13:14:23,828 INFO L673 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 [2020-10-11 13:14:23,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-11 13:14:23,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-11 13:14:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:14:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-11 13:14:23,830 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-11 13:14:23,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:23,830 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-11 13:14:23,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-11 13:14:23,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:23,831 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:23,831 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:24,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-11 13:14:24,041 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:24,042 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-11 13:14:24,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:24,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744157634] [2020-10-11 13:14:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:24,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744157634] [2020-10-11 13:14:24,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127875174] [2020-10-11 13:14:24,139 INFO L93 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 [2020-10-11 13:14:24,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:24,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:24,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:24,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:24,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:14:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:24,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:24,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:14:24,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259511399] [2020-10-11 13:14:24,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:24,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:24,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:24,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:24,215 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-11 13:14:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:24,729 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-11 13:14:24,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:24,730 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:14:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:24,731 INFO L225 Difference]: With dead ends: 72 [2020-10-11 13:14:24,731 INFO L226 Difference]: Without dead ends: 67 [2020-10-11 13:14:24,731 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:14:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-11 13:14:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-11 13:14:24,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-11 13:14:24,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-11 13:14:24,734 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-11 13:14:24,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:24,734 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-11 13:14:24,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:24,734 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-11 13:14:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:24,734 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:24,735 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:24,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-11 13:14:24,938 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:24,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:24,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-11 13:14:24,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:24,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044604241] [2020-10-11 13:14:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:25,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044604241] [2020-10-11 13:14:25,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727225556] [2020-10-11 13:14:25,067 INFO L93 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 [2020-10-11 13:14:25,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 13:14:25,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:25,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:25,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:25,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:25,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:25,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:14:25,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373106259] [2020-10-11 13:14:25,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:25,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:25,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:25,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:25,124 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-11 13:14:25,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:25,344 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-11 13:14:25,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-11 13:14:25,344 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:14:25,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:25,345 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:14:25,345 INFO L226 Difference]: Without dead ends: 72 [2020-10-11 13:14:25,346 INFO L673 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 [2020-10-11 13:14:25,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-11 13:14:25,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-11 13:14:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:14:25,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-11 13:14:25,348 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-11 13:14:25,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:25,348 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-11 13:14:25,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:25,348 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-11 13:14:25,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:25,349 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:25,349 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:25,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:25,550 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:25,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:25,550 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-11 13:14:25,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:25,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032791140] [2020-10-11 13:14:25,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:25,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032791140] [2020-10-11 13:14:25,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341071249] [2020-10-11 13:14:25,687 INFO L93 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 [2020-10-11 13:14:25,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:25,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:25,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:25,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:25,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:25,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:25,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:14:25,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340539890] [2020-10-11 13:14:25,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:25,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:25,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:25,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:25,755 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-11 13:14:26,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:26,012 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-11 13:14:26,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-11 13:14:26,013 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:14:26,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:26,014 INFO L225 Difference]: With dead ends: 90 [2020-10-11 13:14:26,014 INFO L226 Difference]: Without dead ends: 84 [2020-10-11 13:14:26,014 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:14:26,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-11 13:14:26,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-11 13:14:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-11 13:14:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-11 13:14:26,016 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-11 13:14:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:26,017 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-11 13:14:26,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-11 13:14:26,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:26,017 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:26,017 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:26,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:26,226 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:26,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:26,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-11 13:14:26,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:26,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826163783] [2020-10-11 13:14:26,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:26,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826163783] [2020-10-11 13:14:26,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728894080] [2020-10-11 13:14:26,357 INFO L93 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 [2020-10-11 13:14:26,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-11 13:14:26,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:26,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:26,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:26,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:26,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:14:26,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576979449] [2020-10-11 13:14:26,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:26,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:26,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:26,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:26,421 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-11 13:14:26,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:26,722 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-11 13:14:26,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:14:26,722 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:14:26,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:26,723 INFO L225 Difference]: With dead ends: 91 [2020-10-11 13:14:26,723 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 13:14:26,724 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:14:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 13:14:26,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-11 13:14:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-11 13:14:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-11 13:14:26,726 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-11 13:14:26,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:26,726 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-11 13:14:26,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:26,727 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-11 13:14:26,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:26,727 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:26,727 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:26,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:26,928 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:26,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:26,928 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-11 13:14:26,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:26,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175994640] [2020-10-11 13:14:26,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:27,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175994640] [2020-10-11 13:14:27,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589962714] [2020-10-11 13:14:27,061 INFO L93 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 [2020-10-11 13:14:27,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 13:14:27,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:27,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:27,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:27,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:27,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:27,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:14:27,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621299253] [2020-10-11 13:14:27,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:27,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:27,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:27,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:27,144 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-11 13:14:27,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:27,462 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-11 13:14:27,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:14:27,463 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:14:27,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:27,464 INFO L225 Difference]: With dead ends: 99 [2020-10-11 13:14:27,464 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 13:14:27,464 INFO L673 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 [2020-10-11 13:14:27,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 13:14:27,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-11 13:14:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:14:27,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-11 13:14:27,466 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-11 13:14:27,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:27,466 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-11 13:14:27,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:27,467 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-11 13:14:27,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:27,467 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:27,467 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:27,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:27,668 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:27,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:27,668 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-11 13:14:27,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:27,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213432450] [2020-10-11 13:14:27,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:27,789 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:27,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213432450] [2020-10-11 13:14:27,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911661776] [2020-10-11 13:14:27,789 INFO L93 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 [2020-10-11 13:14:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:27,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:27,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:27,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:27,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:14:27,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128793049] [2020-10-11 13:14:27,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:27,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:27,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:27,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:27,850 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-11 13:14:28,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:28,187 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-11 13:14:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:14:28,188 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:14:28,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:28,189 INFO L225 Difference]: With dead ends: 99 [2020-10-11 13:14:28,189 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 13:14:28,189 INFO L673 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 [2020-10-11 13:14:28,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 13:14:28,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-11 13:14:28,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-11 13:14:28,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-11 13:14:28,192 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-11 13:14:28,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:28,192 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-11 13:14:28,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:28,192 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-11 13:14:28,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:28,192 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:28,192 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:28,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-11 13:14:28,393 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:28,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-11 13:14:28,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:28,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202582834] [2020-10-11 13:14:28,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:28,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202582834] [2020-10-11 13:14:28,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606477461] [2020-10-11 13:14:28,520 INFO L93 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 [2020-10-11 13:14:28,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:28,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:28,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:28,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:28,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:28,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:28,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:14:28,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176848088] [2020-10-11 13:14:28,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:28,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:28,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:28,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:28,588 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-11 13:14:29,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:29,001 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-11 13:14:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:14:29,001 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:14:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:29,002 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:14:29,002 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 13:14:29,003 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:14:29,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 13:14:29,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-11 13:14:29,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-11 13:14:29,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-11 13:14:29,005 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-11 13:14:29,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:29,006 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-11 13:14:29,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:29,006 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-11 13:14:29,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:29,006 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:29,006 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:29,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:29,213 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:29,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:29,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-11 13:14:29,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:29,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275117394] [2020-10-11 13:14:29,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:29,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275117394] [2020-10-11 13:14:29,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408176496] [2020-10-11 13:14:29,321 INFO L93 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 [2020-10-11 13:14:29,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 13:14:29,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:29,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:29,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:29,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:29,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:14:29,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404175782] [2020-10-11 13:14:29,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:29,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:29,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:29,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:29,389 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-11 13:14:29,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:29,779 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-11 13:14:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:29,779 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:14:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:29,780 INFO L225 Difference]: With dead ends: 97 [2020-10-11 13:14:29,780 INFO L226 Difference]: Without dead ends: 91 [2020-10-11 13:14:29,781 INFO L673 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 [2020-10-11 13:14:29,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-11 13:14:29,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-11 13:14:29,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:14:29,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-11 13:14:29,783 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-11 13:14:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:29,783 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-11 13:14:29,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-11 13:14:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:29,784 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:29,784 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:29,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-11 13:14:29,985 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:29,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:29,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-11 13:14:29,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:29,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555518748] [2020-10-11 13:14:29,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:30,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555518748] [2020-10-11 13:14:30,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454363515] [2020-10-11 13:14:30,097 INFO L93 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 [2020-10-11 13:14:30,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:30,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:30,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:30,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:30,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:30,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:30,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:14:30,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084424847] [2020-10-11 13:14:30,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:30,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:30,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:30,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:30,221 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-11 13:14:30,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:30,872 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-11 13:14:30,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:14:30,873 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:14:30,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:30,874 INFO L225 Difference]: With dead ends: 94 [2020-10-11 13:14:30,874 INFO L226 Difference]: Without dead ends: 88 [2020-10-11 13:14:30,875 INFO L673 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 [2020-10-11 13:14:30,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-11 13:14:30,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-11 13:14:30,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:14:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-11 13:14:30,878 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-11 13:14:30,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:30,879 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-11 13:14:30,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:30,879 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-11 13:14:30,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:30,880 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:30,880 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:31,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:31,089 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:31,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:31,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-11 13:14:31,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:31,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378310912] [2020-10-11 13:14:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:31,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378310912] [2020-10-11 13:14:31,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559619906] [2020-10-11 13:14:31,252 INFO L93 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 [2020-10-11 13:14:31,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-11 13:14:31,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:31,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:31,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:31,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:31,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:14:31,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566398253] [2020-10-11 13:14:31,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:31,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:31,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:31,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:31,345 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-11 13:14:31,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:31,937 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-11 13:14:31,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:14:31,937 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:14:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:31,938 INFO L225 Difference]: With dead ends: 95 [2020-10-11 13:14:31,938 INFO L226 Difference]: Without dead ends: 89 [2020-10-11 13:14:31,938 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:14:31,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-11 13:14:31,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-11 13:14:31,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-11 13:14:31,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-11 13:14:31,940 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-11 13:14:31,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:31,941 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-11 13:14:31,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:31,941 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-11 13:14:31,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:31,941 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:31,941 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:32,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-11 13:14:32,147 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:32,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:32,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-11 13:14:32,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:32,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709257773] [2020-10-11 13:14:32,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:32,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709257773] [2020-10-11 13:14:32,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035511211] [2020-10-11 13:14:32,266 INFO L93 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 [2020-10-11 13:14:32,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 13:14:32,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:32,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:32,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:32,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:32,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:32,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:14:32,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202015060] [2020-10-11 13:14:32,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:32,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:32,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:32,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:32,340 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-11 13:14:32,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:32,874 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-11 13:14:32,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:14:32,875 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:14:32,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:32,876 INFO L225 Difference]: With dead ends: 92 [2020-10-11 13:14:32,876 INFO L226 Difference]: Without dead ends: 86 [2020-10-11 13:14:32,876 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:14:32,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-11 13:14:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-11 13:14:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:14:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-11 13:14:32,880 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-11 13:14:32,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:32,880 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-11 13:14:32,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:32,881 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-11 13:14:32,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:32,881 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:32,881 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:33,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:33,088 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:33,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:33,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-11 13:14:33,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:33,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051565180] [2020-10-11 13:14:33,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:33,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051565180] [2020-10-11 13:14:33,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917561405] [2020-10-11 13:14:33,192 INFO L93 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 [2020-10-11 13:14:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:33,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:33,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:33,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:33,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-11 13:14:33,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064434809] [2020-10-11 13:14:33,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-11 13:14:33,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:33,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-11 13:14:33,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-11 13:14:33,255 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-11 13:14:33,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:33,707 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-11 13:14:33,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:33,708 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-11 13:14:33,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:33,709 INFO L225 Difference]: With dead ends: 112 [2020-10-11 13:14:33,709 INFO L226 Difference]: Without dead ends: 106 [2020-10-11 13:14:33,710 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 13:14:33,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-11 13:14:33,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-11 13:14:33,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:14:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-11 13:14:33,712 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-11 13:14:33,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:33,713 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-11 13:14:33,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-11 13:14:33,713 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-11 13:14:33,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-11 13:14:33,713 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:33,713 INFO L421 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:33,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:33,921 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:33,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:33,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-11 13:14:33,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:33,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800758405] [2020-10-11 13:14:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:34,022 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:34,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800758405] [2020-10-11 13:14:34,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021885866] [2020-10-11 13:14:34,023 INFO L93 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 [2020-10-11 13:14:34,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:34,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:34,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-11 13:14:34,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:34,115 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:34,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:34,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-11 13:14:34,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752867001] [2020-10-11 13:14:34,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:34,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:34,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:34,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:34,128 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-11 13:14:34,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:34,710 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-11 13:14:34,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:14:34,711 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-11 13:14:34,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:34,712 INFO L225 Difference]: With dead ends: 93 [2020-10-11 13:14:34,712 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 13:14:34,712 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:14:34,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 13:14:34,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-11 13:14:34,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-11 13:14:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-11 13:14:34,714 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-11 13:14:34,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:34,715 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-11 13:14:34,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-11 13:14:34,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:34,715 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:34,715 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:34,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:34,924 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:34,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:34,924 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-11 13:14:34,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:34,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897826108] [2020-10-11 13:14:34,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:35,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897826108] [2020-10-11 13:14:35,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431053906] [2020-10-11 13:14:35,082 INFO L93 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 [2020-10-11 13:14:35,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 13:14:35,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:35,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:35,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:35,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:35,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:14:35,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927636354] [2020-10-11 13:14:35,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:35,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:35,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:35,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:35,141 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-11 13:14:35,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:35,435 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-11 13:14:35,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:14:35,436 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:14:35,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:35,437 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:14:35,437 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:14:35,437 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:14:35,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:14:35,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-11 13:14:35,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:14:35,440 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-11 13:14:35,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:35,440 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:14:35,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:35,440 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:14:35,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:35,441 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:35,441 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:35,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:35,649 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:35,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:35,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-11 13:14:35,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:35,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332888241] [2020-10-11 13:14:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:35,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332888241] [2020-10-11 13:14:35,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622060542] [2020-10-11 13:14:35,815 INFO L93 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 [2020-10-11 13:14:35,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:35,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:35,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:35,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:35,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:35,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:35,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:35,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410851188] [2020-10-11 13:14:35,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:35,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:35,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:35,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:35,894 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-11 13:14:36,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:36,269 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-11 13:14:36,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:14:36,269 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:36,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:36,270 INFO L225 Difference]: With dead ends: 101 [2020-10-11 13:14:36,271 INFO L226 Difference]: Without dead ends: 95 [2020-10-11 13:14:36,271 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:14:36,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-11 13:14:36,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-11 13:14:36,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:36,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:14:36,274 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-11 13:14:36,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:36,274 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:14:36,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:36,274 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:14:36,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:36,275 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:36,275 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:36,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:36,475 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:36,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:36,476 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-11 13:14:36,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:36,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738120030] [2020-10-11 13:14:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:36,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738120030] [2020-10-11 13:14:36,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242894643] [2020-10-11 13:14:36,629 INFO L93 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 [2020-10-11 13:14:36,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-11 13:14:36,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:36,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:36,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:36,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:36,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:14:36,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397062924] [2020-10-11 13:14:36,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:36,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:36,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:36,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:36,689 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-11 13:14:37,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:37,037 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-11 13:14:37,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:14:37,038 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:14:37,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:37,039 INFO L225 Difference]: With dead ends: 98 [2020-10-11 13:14:37,039 INFO L226 Difference]: Without dead ends: 92 [2020-10-11 13:14:37,039 INFO L673 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 [2020-10-11 13:14:37,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-11 13:14:37,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-11 13:14:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:14:37,042 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-11 13:14:37,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:37,042 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:14:37,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:37,042 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:14:37,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:37,043 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:37,043 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:37,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:37,245 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:37,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:37,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-11 13:14:37,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:37,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103046001] [2020-10-11 13:14:37,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:37,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103046001] [2020-10-11 13:14:37,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306118735] [2020-10-11 13:14:37,391 INFO L93 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 [2020-10-11 13:14:37,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 13:14:37,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:37,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:37,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:37,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:37,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:37,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:37,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553115925] [2020-10-11 13:14:37,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:37,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:37,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:37,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:37,468 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-11 13:14:37,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:37,892 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-11 13:14:37,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:14:37,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:37,894 INFO L225 Difference]: With dead ends: 97 [2020-10-11 13:14:37,894 INFO L226 Difference]: Without dead ends: 91 [2020-10-11 13:14:37,894 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 13:14:37,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-11 13:14:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-11 13:14:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:37,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:14:37,897 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-11 13:14:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:37,898 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:14:37,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:37,898 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:14:37,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:37,898 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:37,898 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:38,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:38,102 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:38,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:38,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-11 13:14:38,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:38,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187981354] [2020-10-11 13:14:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:38,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187981354] [2020-10-11 13:14:38,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540674060] [2020-10-11 13:14:38,241 INFO L93 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 [2020-10-11 13:14:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:38,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:38,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:38,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:38,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:14:38,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944791229] [2020-10-11 13:14:38,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:38,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:38,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:38,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:38,303 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-11 13:14:38,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:38,689 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-11 13:14:38,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:14:38,689 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:14:38,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:38,690 INFO L225 Difference]: With dead ends: 94 [2020-10-11 13:14:38,690 INFO L226 Difference]: Without dead ends: 88 [2020-10-11 13:14:38,691 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:14:38,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-11 13:14:38,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-11 13:14:38,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:38,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:14:38,692 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-11 13:14:38,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:38,692 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:14:38,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:38,692 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:14:38,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:38,693 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:38,693 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:38,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-11 13:14:38,894 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:38,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:38,894 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-11 13:14:38,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:38,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330610800] [2020-10-11 13:14:38,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:39,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330610800] [2020-10-11 13:14:39,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522111099] [2020-10-11 13:14:39,031 INFO L93 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 [2020-10-11 13:14:39,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:39,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:39,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:39,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:39,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:39,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:39,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:39,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309771116] [2020-10-11 13:14:39,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:39,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:39,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:39,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:39,117 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-11 13:14:39,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:39,609 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-11 13:14:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:14:39,609 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:39,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:39,610 INFO L225 Difference]: With dead ends: 93 [2020-10-11 13:14:39,610 INFO L226 Difference]: Without dead ends: 87 [2020-10-11 13:14:39,611 INFO L673 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 [2020-10-11 13:14:39,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-11 13:14:39,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-11 13:14:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:14:39,613 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-11 13:14:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:39,613 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:14:39,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:39,614 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:14:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:39,614 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:39,614 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:39,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:39,815 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:39,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:39,816 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-11 13:14:39,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:39,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228568884] [2020-10-11 13:14:39,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:39,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228568884] [2020-10-11 13:14:39,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908599440] [2020-10-11 13:14:39,928 INFO L93 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 [2020-10-11 13:14:40,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 13:14:40,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:40,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:40,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:40,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:40,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:14:40,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848662491] [2020-10-11 13:14:40,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:40,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:40,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:40,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:40,048 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-11 13:14:40,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:40,547 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-11 13:14:40,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:40,547 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:14:40,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:40,548 INFO L225 Difference]: With dead ends: 90 [2020-10-11 13:14:40,548 INFO L226 Difference]: Without dead ends: 84 [2020-10-11 13:14:40,548 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 13:14:40,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-11 13:14:40,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-11 13:14:40,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:14:40,550 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-11 13:14:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:40,550 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:14:40,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:40,550 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:14:40,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:40,550 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:40,550 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:40,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-11 13:14:40,751 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:40,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:40,752 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-11 13:14:40,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:40,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99195640] [2020-10-11 13:14:40,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:40,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99195640] [2020-10-11 13:14:40,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373321555] [2020-10-11 13:14:40,896 INFO L93 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 [2020-10-11 13:14:40,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:40,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:40,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:40,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:40,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:40,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:40,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:40,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151487121] [2020-10-11 13:14:40,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:40,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:40,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:40,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:40,973 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-11 13:14:41,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:41,539 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-11 13:14:41,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:14:41,540 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:41,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:41,541 INFO L225 Difference]: With dead ends: 89 [2020-10-11 13:14:41,541 INFO L226 Difference]: Without dead ends: 83 [2020-10-11 13:14:41,541 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 13:14:41,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-11 13:14:41,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-11 13:14:41,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:41,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:14:41,544 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-11 13:14:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:41,544 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:14:41,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:41,545 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:14:41,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:41,545 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:41,545 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:41,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:41,753 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:41,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:41,754 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-11 13:14:41,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:41,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414720769] [2020-10-11 13:14:41,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:41,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414720769] [2020-10-11 13:14:41,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305871126] [2020-10-11 13:14:41,873 INFO L93 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 [2020-10-11 13:14:41,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-11 13:14:41,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:41,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:41,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:41,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:41,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:14:41,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439588628] [2020-10-11 13:14:41,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:41,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:41,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:41,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:41,934 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-11 13:14:42,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:42,379 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-11 13:14:42,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:14:42,380 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:14:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:42,381 INFO L225 Difference]: With dead ends: 86 [2020-10-11 13:14:42,381 INFO L226 Difference]: Without dead ends: 80 [2020-10-11 13:14:42,381 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:14:42,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-11 13:14:42,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-11 13:14:42,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:14:42,384 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-11 13:14:42,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:42,384 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:14:42,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:42,384 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:14:42,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:42,385 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:42,385 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:42,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:42,595 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:42,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:42,595 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-11 13:14:42,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:42,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963523742] [2020-10-11 13:14:42,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:42,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963523742] [2020-10-11 13:14:42,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618497889] [2020-10-11 13:14:42,728 INFO L93 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 [2020-10-11 13:14:42,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-11 13:14:42,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:42,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:42,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:42,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:42,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:42,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:42,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426465427] [2020-10-11 13:14:42,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:42,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:42,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:42,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:42,815 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-11 13:14:43,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:43,455 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-11 13:14:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:14:43,455 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:43,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:43,456 INFO L225 Difference]: With dead ends: 85 [2020-10-11 13:14:43,456 INFO L226 Difference]: Without dead ends: 79 [2020-10-11 13:14:43,457 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:14:43,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-11 13:14:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-11 13:14:43,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:43,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:14:43,459 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-11 13:14:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:43,459 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:14:43,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:14:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:43,460 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:43,460 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:43,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:43,668 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:43,669 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-11 13:14:43,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:43,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268167882] [2020-10-11 13:14:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:43,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:43,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268167882] [2020-10-11 13:14:43,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943930371] [2020-10-11 13:14:43,789 INFO L93 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 [2020-10-11 13:14:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:43,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:43,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:43,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:43,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-11 13:14:43,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510536104] [2020-10-11 13:14:43,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-11 13:14:43,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:43,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-11 13:14:43,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-11 13:14:43,855 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-11 13:14:44,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:44,373 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-11 13:14:44,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:44,374 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-11 13:14:44,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:44,375 INFO L225 Difference]: With dead ends: 101 [2020-10-11 13:14:44,375 INFO L226 Difference]: Without dead ends: 95 [2020-10-11 13:14:44,376 INFO L673 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 [2020-10-11 13:14:44,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-11 13:14:44,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-11 13:14:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-11 13:14:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-11 13:14:44,378 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-11 13:14:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:44,378 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-11 13:14:44,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-11 13:14:44,378 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-11 13:14:44,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:44,379 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:44,379 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:44,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:44,580 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:44,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:44,580 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-11 13:14:44,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:44,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218520099] [2020-10-11 13:14:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:44,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218520099] [2020-10-11 13:14:44,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57119384] [2020-10-11 13:14:44,696 INFO L93 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 [2020-10-11 13:14:44,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:44,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:44,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:44,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:44,772 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:44,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:44,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:44,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548996972] [2020-10-11 13:14:44,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:44,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:44,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:44,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:44,773 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-11 13:14:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:45,377 INFO L93 Difference]: Finished difference Result 80 states and 197 transitions. [2020-10-11 13:14:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:14:45,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:45,379 INFO L225 Difference]: With dead ends: 80 [2020-10-11 13:14:45,379 INFO L226 Difference]: Without dead ends: 72 [2020-10-11 13:14:45,379 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:14:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-11 13:14:45,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-10-11 13:14:45,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-11 13:14:45,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-11 13:14:45,382 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-11 13:14:45,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:45,382 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-11 13:14:45,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:45,383 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-11 13:14:45,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-11 13:14:45,383 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:45,383 INFO L421 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:45,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:45,591 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:45,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:45,592 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-11 13:14:45,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:45,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660978738] [2020-10-11 13:14:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:45,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660978738] [2020-10-11 13:14:45,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847399776] [2020-10-11 13:14:45,710 INFO L93 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 [2020-10-11 13:14:45,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-11 13:14:45,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:45,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-11 13:14:45,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:45,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:14:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:45,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:45,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-11 13:14:45,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740465025] [2020-10-11 13:14:45,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:45,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:45,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:45,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:45,787 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-11 13:14:46,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:46,403 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-11 13:14:46,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:46,404 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-11 13:14:46,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:46,405 INFO L225 Difference]: With dead ends: 92 [2020-10-11 13:14:46,405 INFO L226 Difference]: Without dead ends: 87 [2020-10-11 13:14:46,405 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:14:46,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-11 13:14:46,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-11 13:14:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:14:46,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-11 13:14:46,408 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-11 13:14:46,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:46,408 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-11 13:14:46,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-11 13:14:46,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:46,409 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:46,409 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:46,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:46,609 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:46,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:46,610 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-11 13:14:46,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:46,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909474831] [2020-10-11 13:14:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:46,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909474831] [2020-10-11 13:14:46,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120510633] [2020-10-11 13:14:46,749 INFO L93 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 [2020-10-11 13:14:46,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:46,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:46,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:46,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:46,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:14:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:46,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:46,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:46,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493174229] [2020-10-11 13:14:46,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:46,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:46,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:46,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:46,828 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-11 13:14:47,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:47,515 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-11 13:14:47,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:47,516 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:47,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:47,517 INFO L225 Difference]: With dead ends: 78 [2020-10-11 13:14:47,517 INFO L226 Difference]: Without dead ends: 73 [2020-10-11 13:14:47,517 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:14:47,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-11 13:14:47,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-11 13:14:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-11 13:14:47,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-11 13:14:47,519 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-11 13:14:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:47,519 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-11 13:14:47,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-11 13:14:47,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:47,520 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:47,520 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:47,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-11 13:14:47,721 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:47,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:47,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-11 13:14:47,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:47,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454715957] [2020-10-11 13:14:47,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:47,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454715957] [2020-10-11 13:14:47,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851389529] [2020-10-11 13:14:47,906 INFO L93 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 [2020-10-11 13:14:47,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 13:14:47,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:47,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:47,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:47,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:47,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:47,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590563860] [2020-10-11 13:14:47,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:47,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:47,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:47,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:47,964 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-11 13:14:48,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:48,261 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-11 13:14:48,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-11 13:14:48,261 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:48,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:48,262 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:14:48,262 INFO L226 Difference]: Without dead ends: 78 [2020-10-11 13:14:48,263 INFO L673 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 [2020-10-11 13:14:48,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-11 13:14:48,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-11 13:14:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:14:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-11 13:14:48,264 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-11 13:14:48,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:48,265 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-11 13:14:48,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:48,265 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-11 13:14:48,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:48,265 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:48,265 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:48,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:48,466 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:48,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:48,466 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-11 13:14:48,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:48,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757282609] [2020-10-11 13:14:48,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:48,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757282609] [2020-10-11 13:14:48,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148193857] [2020-10-11 13:14:48,640 INFO L93 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 [2020-10-11 13:14:48,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 13:14:48,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:48,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:48,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:48,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:48,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:48,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:48,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277476182] [2020-10-11 13:14:48,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:48,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:48,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:48,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:48,733 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-11 13:14:49,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:49,075 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-11 13:14:49,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-11 13:14:49,076 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:49,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:49,077 INFO L225 Difference]: With dead ends: 98 [2020-10-11 13:14:49,077 INFO L226 Difference]: Without dead ends: 92 [2020-10-11 13:14:49,077 INFO L673 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 [2020-10-11 13:14:49,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-11 13:14:49,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-11 13:14:49,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-11 13:14:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-11 13:14:49,079 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-11 13:14:49,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:49,080 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-11 13:14:49,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:49,080 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-11 13:14:49,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:49,080 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:49,080 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:49,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-11 13:14:49,285 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:49,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:49,285 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-11 13:14:49,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:49,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620975468] [2020-10-11 13:14:49,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:49,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620975468] [2020-10-11 13:14:49,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599531775] [2020-10-11 13:14:49,460 INFO L93 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 [2020-10-11 13:14:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:49,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:49,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:49,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:49,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:49,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447289960] [2020-10-11 13:14:49,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:49,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:49,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:49,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:49,513 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-11 13:14:49,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:49,914 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-11 13:14:49,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:14:49,915 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:49,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:49,917 INFO L225 Difference]: With dead ends: 99 [2020-10-11 13:14:49,917 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 13:14:49,917 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:14:49,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 13:14:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-11 13:14:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-11 13:14:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-11 13:14:49,920 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-11 13:14:49,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:49,921 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-11 13:14:49,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-11 13:14:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:49,922 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:49,922 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:50,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:50,131 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:50,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:50,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-11 13:14:50,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:50,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745837252] [2020-10-11 13:14:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:50,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745837252] [2020-10-11 13:14:50,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739234150] [2020-10-11 13:14:50,353 INFO L93 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 [2020-10-11 13:14:50,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:50,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:50,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:50,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:50,449 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:50,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:50,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:50,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787953877] [2020-10-11 13:14:50,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:50,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:50,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:50,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:50,461 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-11 13:14:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:50,838 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-11 13:14:50,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:14:50,839 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:50,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:50,840 INFO L225 Difference]: With dead ends: 109 [2020-10-11 13:14:50,840 INFO L226 Difference]: Without dead ends: 103 [2020-10-11 13:14:50,840 INFO L673 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 [2020-10-11 13:14:50,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-11 13:14:50,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-11 13:14:50,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:14:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-11 13:14:50,843 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-11 13:14:50,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:50,843 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-11 13:14:50,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-11 13:14:50,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:50,844 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:50,844 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:51,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:51,054 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:51,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:51,054 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-11 13:14:51,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:51,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692835644] [2020-10-11 13:14:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:51,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692835644] [2020-10-11 13:14:51,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002186313] [2020-10-11 13:14:51,214 INFO L93 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 [2020-10-11 13:14:51,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 13:14:51,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:51,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:51,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:51,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:51,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:51,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104095741] [2020-10-11 13:14:51,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:51,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:51,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:51,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:51,273 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-11 13:14:51,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:51,687 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-11 13:14:51,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:14:51,688 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:51,689 INFO L225 Difference]: With dead ends: 109 [2020-10-11 13:14:51,689 INFO L226 Difference]: Without dead ends: 103 [2020-10-11 13:14:51,690 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:14:51,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-11 13:14:51,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-11 13:14:51,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-11 13:14:51,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-11 13:14:51,693 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-11 13:14:51,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:51,693 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-11 13:14:51,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-11 13:14:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:51,694 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:51,694 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:51,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-11 13:14:51,904 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:51,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:51,904 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-11 13:14:51,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:51,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577766137] [2020-10-11 13:14:51,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:52,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577766137] [2020-10-11 13:14:52,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106997640] [2020-10-11 13:14:52,074 INFO L93 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 [2020-10-11 13:14:52,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:52,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:52,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:52,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:52,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:52,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:52,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:52,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226737708] [2020-10-11 13:14:52,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:52,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:52,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:52,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:52,152 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-11 13:14:52,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:52,647 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-11 13:14:52,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:14:52,647 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:52,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:52,648 INFO L225 Difference]: With dead ends: 106 [2020-10-11 13:14:52,648 INFO L226 Difference]: Without dead ends: 100 [2020-10-11 13:14:52,648 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:14:52,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-11 13:14:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-11 13:14:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:14:52,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-11 13:14:52,651 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-11 13:14:52,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:52,651 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-11 13:14:52,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:52,652 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-11 13:14:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:52,652 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:52,652 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:52,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-11 13:14:52,860 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:52,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:52,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-11 13:14:52,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:52,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967195174] [2020-10-11 13:14:52,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:52,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:53,006 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:53,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967195174] [2020-10-11 13:14:53,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410412672] [2020-10-11 13:14:53,007 INFO L93 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 [2020-10-11 13:14:53,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 13:14:53,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:53,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:53,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:53,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:53,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:53,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596427295] [2020-10-11 13:14:53,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:53,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:53,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:53,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:53,071 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-11 13:14:53,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:53,534 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-11 13:14:53,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:14:53,534 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:53,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:53,535 INFO L225 Difference]: With dead ends: 107 [2020-10-11 13:14:53,535 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:14:53,535 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 13:14:53,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:14:53,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-11 13:14:53,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-11 13:14:53,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-11 13:14:53,538 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-11 13:14:53,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:53,538 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-11 13:14:53,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:53,538 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-11 13:14:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:53,538 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:53,538 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:53,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:53,743 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:53,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-11 13:14:53,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:53,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519629660] [2020-10-11 13:14:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:53,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519629660] [2020-10-11 13:14:53,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722872134] [2020-10-11 13:14:53,897 INFO L93 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 [2020-10-11 13:14:53,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 13:14:53,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:53,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:53,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:53,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:53,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:53,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:53,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545417668] [2020-10-11 13:14:53,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:53,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:53,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:53,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:53,978 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-11 13:14:54,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:54,534 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-11 13:14:54,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:14:54,535 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:54,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:54,536 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:14:54,536 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:14:54,536 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:14:54,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:14:54,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-11 13:14:54,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 13:14:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-11 13:14:54,539 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-11 13:14:54,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:54,539 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-11 13:14:54,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:54,539 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-11 13:14:54,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:54,540 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:54,540 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:54,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-11 13:14:54,748 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:54,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:54,749 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-11 13:14:54,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:54,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717008428] [2020-10-11 13:14:54,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:54,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717008428] [2020-10-11 13:14:54,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110682859] [2020-10-11 13:14:54,939 INFO L93 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 [2020-10-11 13:14:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:55,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:55,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:55,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:55,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:55,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047020969] [2020-10-11 13:14:55,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:55,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:55,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:55,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:55,047 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-11 13:14:55,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:55,674 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-11 13:14:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:14:55,674 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:55,675 INFO L225 Difference]: With dead ends: 105 [2020-10-11 13:14:55,675 INFO L226 Difference]: Without dead ends: 99 [2020-10-11 13:14:55,675 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:14:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-11 13:14:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-11 13:14:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:14:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-11 13:14:55,678 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-11 13:14:55,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:55,678 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-11 13:14:55,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-11 13:14:55,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:55,678 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:55,679 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:55,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:55,887 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:55,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-11 13:14:55,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:55,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015178398] [2020-10-11 13:14:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:56,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015178398] [2020-10-11 13:14:56,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804194940] [2020-10-11 13:14:56,028 INFO L93 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 [2020-10-11 13:14:56,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:14:56,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:56,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:56,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:56,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:56,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:56,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:56,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987296149] [2020-10-11 13:14:56,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:56,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:56,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:56,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:56,103 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-11 13:14:56,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:56,723 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-11 13:14:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:14:56,724 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:56,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:56,724 INFO L225 Difference]: With dead ends: 102 [2020-10-11 13:14:56,725 INFO L226 Difference]: Without dead ends: 96 [2020-10-11 13:14:56,725 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:14:56,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-11 13:14:56,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-11 13:14:56,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:14:56,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-11 13:14:56,728 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-11 13:14:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:56,728 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-11 13:14:56,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:56,728 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-11 13:14:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:56,729 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:56,729 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:56,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-11 13:14:56,938 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:56,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:56,938 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-11 13:14:56,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:56,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596197506] [2020-10-11 13:14:56,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:57,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596197506] [2020-10-11 13:14:57,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542029046] [2020-10-11 13:14:57,070 INFO L93 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 [2020-10-11 13:14:57,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 13:14:57,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:57,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:57,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:57,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:57,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:57,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054280973] [2020-10-11 13:14:57,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:57,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:57,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:57,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:57,135 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-11 13:14:57,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:57,691 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-11 13:14:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:14:57,691 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:57,692 INFO L225 Difference]: With dead ends: 103 [2020-10-11 13:14:57,692 INFO L226 Difference]: Without dead ends: 97 [2020-10-11 13:14:57,693 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:14:57,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-11 13:14:57,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-11 13:14:57,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-11 13:14:57,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-11 13:14:57,695 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-11 13:14:57,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:57,695 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-11 13:14:57,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:57,696 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-11 13:14:57,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:57,696 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:57,696 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:57,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:14:57,903 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:57,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:57,903 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-11 13:14:57,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:57,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606838940] [2020-10-11 13:14:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:58,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606838940] [2020-10-11 13:14:58,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127251824] [2020-10-11 13:14:58,040 INFO L93 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 [2020-10-11 13:14:58,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:14:58,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:58,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:58,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:58,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:14:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:58,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:58,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:14:58,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825238817] [2020-10-11 13:14:58,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:14:58,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:58,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:14:58,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:14:58,125 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-11 13:14:58,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:58,811 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-11 13:14:58,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:14:58,812 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:14:58,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:58,812 INFO L225 Difference]: With dead ends: 100 [2020-10-11 13:14:58,812 INFO L226 Difference]: Without dead ends: 94 [2020-10-11 13:14:58,813 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:14:58,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-11 13:14:58,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-11 13:14:58,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:14:58,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-11 13:14:58,815 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-11 13:14:58,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:58,815 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-11 13:14:58,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:14:58,815 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-11 13:14:58,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:58,816 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:58,816 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:14:59,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-11 13:14:59,018 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:14:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:14:59,018 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-11 13:14:59,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:14:59,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386007742] [2020-10-11 13:14:59,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:14:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:14:59,150 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:59,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386007742] [2020-10-11 13:14:59,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893292340] [2020-10-11 13:14:59,151 INFO L93 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 [2020-10-11 13:14:59,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 13:14:59,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:14:59,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:14:59,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:14:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:14:59,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:14:59,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-11 13:14:59,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7547064] [2020-10-11 13:14:59,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-11 13:14:59,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:14:59,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-11 13:14:59,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-11 13:14:59,217 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-11 13:14:59,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:14:59,877 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-11 13:14:59,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:14:59,878 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-11 13:14:59,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:14:59,879 INFO L225 Difference]: With dead ends: 120 [2020-10-11 13:14:59,879 INFO L226 Difference]: Without dead ends: 114 [2020-10-11 13:14:59,879 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:14:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-11 13:14:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-11 13:14:59,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 13:14:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-11 13:14:59,882 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-11 13:14:59,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:14:59,883 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-11 13:14:59,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-11 13:14:59,883 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-11 13:14:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-11 13:14:59,884 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:14:59,884 INFO L421 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:00,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-11 13:15:00,093 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:00,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:00,094 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-11 13:15:00,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:00,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659214880] [2020-10-11 13:15:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:00,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659214880] [2020-10-11 13:15:00,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96741890] [2020-10-11 13:15:00,286 INFO L93 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 [2020-10-11 13:15:00,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 13:15:00,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:00,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-11 13:15:00,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:00,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:00,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:00,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-11 13:15:00,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088064048] [2020-10-11 13:15:00,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:15:00,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:00,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:15:00,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:15:00,391 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-11 13:15:01,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:01,114 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-11 13:15:01,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:15:01,115 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-11 13:15:01,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:01,116 INFO L225 Difference]: With dead ends: 101 [2020-10-11 13:15:01,116 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 13:15:01,117 INFO L673 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 [2020-10-11 13:15:01,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 13:15:01,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-11 13:15:01,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-11 13:15:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-11 13:15:01,120 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-11 13:15:01,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:01,120 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-11 13:15:01,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:15:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-11 13:15:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:15:01,120 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:01,121 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:01,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:01,323 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:01,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:01,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-11 13:15:01,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:01,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944506319] [2020-10-11 13:15:01,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:01,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944506319] [2020-10-11 13:15:01,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529717473] [2020-10-11 13:15:01,522 INFO L93 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 [2020-10-11 13:15:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:01,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:15:01,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:01,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:01,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:15:01,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672799135] [2020-10-11 13:15:01,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:15:01,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:01,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:15:01,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:15:01,579 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-11 13:15:01,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:01,936 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-11 13:15:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:15:01,936 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:15:01,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:01,937 INFO L225 Difference]: With dead ends: 114 [2020-10-11 13:15:01,937 INFO L226 Difference]: Without dead ends: 108 [2020-10-11 13:15:01,937 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-10-11 13:15:01,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-11 13:15:01,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-11 13:15:01,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:15:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:15:01,940 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:15:01,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:01,941 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:15:01,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:15:01,941 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:15:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:15:01,941 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:01,941 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:02,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:02,148 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:02,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:02,149 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-11 13:15:02,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:02,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686664879] [2020-10-11 13:15:02,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:02,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686664879] [2020-10-11 13:15:02,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225437870] [2020-10-11 13:15:02,351 INFO L93 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 [2020-10-11 13:15:02,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:02,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:02,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:15:02,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:02,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:02,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:02,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:15:02,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681729813] [2020-10-11 13:15:02,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:02,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:02,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:02,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:02,432 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:15:02,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:02,847 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-11 13:15:02,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:15:02,847 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:15:02,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:02,848 INFO L225 Difference]: With dead ends: 111 [2020-10-11 13:15:02,848 INFO L226 Difference]: Without dead ends: 105 [2020-10-11 13:15:02,849 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:15:02,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-11 13:15:02,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-11 13:15:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:15:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:15:02,851 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:15:02,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:02,851 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:15:02,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:15:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:15:02,852 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:02,852 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:03,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-11 13:15:03,052 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:03,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:03,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-11 13:15:03,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:03,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148036651] [2020-10-11 13:15:03,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:03,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148036651] [2020-10-11 13:15:03,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820572692] [2020-10-11 13:15:03,238 INFO L93 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 [2020-10-11 13:15:03,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 13:15:03,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:03,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:15:03,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:03,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:03,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:15:03,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6025555] [2020-10-11 13:15:03,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:15:03,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:03,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:15:03,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:15:03,299 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:15:03,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:03,689 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-11 13:15:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:15:03,690 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:15:03,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:03,690 INFO L225 Difference]: With dead ends: 108 [2020-10-11 13:15:03,690 INFO L226 Difference]: Without dead ends: 102 [2020-10-11 13:15:03,691 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-11 13:15:03,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-11 13:15:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-11 13:15:03,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:15:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:15:03,693 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:15:03,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:03,693 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:15:03,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:15:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:15:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:15:03,694 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:03,694 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:03,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:03,894 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:03,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:03,895 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-11 13:15:03,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:03,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893290915] [2020-10-11 13:15:03,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:04,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893290915] [2020-10-11 13:15:04,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742373002] [2020-10-11 13:15:04,085 INFO L93 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 [2020-10-11 13:15:04,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:04,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:04,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:15:04,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:04,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:04,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:04,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:15:04,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073792209] [2020-10-11 13:15:04,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:04,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:04,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:04,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:04,170 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:15:04,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:04,688 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-11 13:15:04,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:15:04,689 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:15:04,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:04,689 INFO L225 Difference]: With dead ends: 107 [2020-10-11 13:15:04,689 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:15:04,690 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 13:15:04,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:15:04,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-11 13:15:04,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:15:04,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:15:04,692 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:15:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:04,692 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:15:04,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:15:04,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:15:04,693 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:04,693 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:04,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-11 13:15:04,894 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:04,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:04,895 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-11 13:15:04,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:04,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650563842] [2020-10-11 13:15:04,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:05,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650563842] [2020-10-11 13:15:05,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218330993] [2020-10-11 13:15:05,070 INFO L93 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 [2020-10-11 13:15:05,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 13:15:05,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:05,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:15:05,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:05,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:05,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:15:05,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510048768] [2020-10-11 13:15:05,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:15:05,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:05,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:15:05,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:15:05,132 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:15:05,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:05,590 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-11 13:15:05,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:15:05,591 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:15:05,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:05,592 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:15:05,592 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:15:05,595 INFO L673 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 [2020-10-11 13:15:05,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:15:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-11 13:15:05,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:15:05,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:15:05,597 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:15:05,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:05,598 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:15:05,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:15:05,598 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:15:05,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:15:05,598 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:05,598 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:05,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-11 13:15:05,806 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:05,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:05,806 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-11 13:15:05,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:05,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601050019] [2020-10-11 13:15:05,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:05,982 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:05,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601050019] [2020-10-11 13:15:05,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120571669] [2020-10-11 13:15:05,982 INFO L93 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 [2020-10-11 13:15:06,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 13:15:06,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:06,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:15:06,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:06,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:06,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:06,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:15:06,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513355398] [2020-10-11 13:15:06,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:06,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:06,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:06,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:06,061 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:15:06,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:06,639 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-11 13:15:06,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:15:06,640 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:15:06,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:06,640 INFO L225 Difference]: With dead ends: 103 [2020-10-11 13:15:06,640 INFO L226 Difference]: Without dead ends: 97 [2020-10-11 13:15:06,641 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:15:06,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-11 13:15:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-11 13:15:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:15:06,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:15:06,645 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:15:06,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:06,645 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:15:06,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:06,645 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:15:06,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:15:06,646 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:06,646 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:06,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-11 13:15:06,855 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:06,855 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-11 13:15:06,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:06,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070165914] [2020-10-11 13:15:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:06,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:07,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070165914] [2020-10-11 13:15:07,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145392930] [2020-10-11 13:15:07,022 INFO L93 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 [2020-10-11 13:15:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:07,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:15:07,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:07,108 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:07,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:07,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:15:07,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093856346] [2020-10-11 13:15:07,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:15:07,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:07,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:15:07,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:15:07,109 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:15:07,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:07,615 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-11 13:15:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:15:07,616 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:15:07,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:07,616 INFO L225 Difference]: With dead ends: 100 [2020-10-11 13:15:07,617 INFO L226 Difference]: Without dead ends: 94 [2020-10-11 13:15:07,617 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:15:07,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-11 13:15:07,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-11 13:15:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:15:07,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:15:07,619 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:15:07,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:07,620 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:15:07,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:15:07,620 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:15:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:15:07,622 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:07,622 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:07,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:07,831 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:07,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:07,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-11 13:15:07,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:07,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435332598] [2020-10-11 13:15:07,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:07,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435332598] [2020-10-11 13:15:07,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002740901] [2020-10-11 13:15:07,982 INFO L93 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 [2020-10-11 13:15:08,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:08,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:08,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:15:08,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:08,047 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:08,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:08,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:15:08,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277269929] [2020-10-11 13:15:08,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:08,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:08,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:08,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:08,060 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:15:08,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:08,729 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-11 13:15:08,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:15:08,729 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:15:08,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:08,730 INFO L225 Difference]: With dead ends: 99 [2020-10-11 13:15:08,730 INFO L226 Difference]: Without dead ends: 93 [2020-10-11 13:15:08,731 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:15:08,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-11 13:15:08,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-11 13:15:08,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:15:08,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:15:08,733 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:15:08,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:08,733 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:15:08,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:08,733 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:15:08,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:15:08,734 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:08,734 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:08,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-11 13:15:08,935 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:08,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:08,936 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-11 13:15:08,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:08,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769133627] [2020-10-11 13:15:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:09,081 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:09,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769133627] [2020-10-11 13:15:09,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418828131] [2020-10-11 13:15:09,082 INFO L93 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 [2020-10-11 13:15:09,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 13:15:09,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:09,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:15:09,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:09,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:09,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:15:09,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620753583] [2020-10-11 13:15:09,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:15:09,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:09,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:15:09,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:15:09,146 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:15:09,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:09,710 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-11 13:15:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:15:09,711 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:15:09,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:09,711 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:15:09,711 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 13:15:09,712 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:15:09,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 13:15:09,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-11 13:15:09,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:15:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:15:09,714 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:15:09,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:09,714 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:15:09,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:15:09,714 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:15:09,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:15:09,715 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:09,715 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:09,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:09,918 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:09,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:09,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-11 13:15:09,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:09,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324830541] [2020-10-11 13:15:09,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:10,071 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:10,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324830541] [2020-10-11 13:15:10,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017976442] [2020-10-11 13:15:10,072 INFO L93 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 [2020-10-11 13:15:10,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:10,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:10,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:15:10,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:10,142 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:10,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:10,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:15:10,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808425883] [2020-10-11 13:15:10,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:10,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:10,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:10,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:10,156 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:15:10,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:10,896 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-11 13:15:10,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:15:10,897 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:15:10,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:10,898 INFO L225 Difference]: With dead ends: 95 [2020-10-11 13:15:10,898 INFO L226 Difference]: Without dead ends: 89 [2020-10-11 13:15:10,898 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:15:10,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-11 13:15:10,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-11 13:15:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:15:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:15:10,901 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:15:10,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:10,901 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:15:10,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:10,901 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:15:10,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:15:10,901 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:10,901 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:11,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:11,102 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:11,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:11,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-11 13:15:11,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:11,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698305191] [2020-10-11 13:15:11,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:11,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698305191] [2020-10-11 13:15:11,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920095089] [2020-10-11 13:15:11,255 INFO L93 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 [2020-10-11 13:15:11,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-11 13:15:11,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:11,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:15:11,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:11,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:11,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:15:11,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330749481] [2020-10-11 13:15:11,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:15:11,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:11,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:15:11,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:15:11,328 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:15:11,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:11,954 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-11 13:15:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:15:11,955 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:15:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:11,956 INFO L225 Difference]: With dead ends: 92 [2020-10-11 13:15:11,956 INFO L226 Difference]: Without dead ends: 86 [2020-10-11 13:15:11,956 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:15:11,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-11 13:15:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-11 13:15:11,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:15:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:15:11,959 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-11 13:15:11,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:11,959 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:15:11,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:15:11,959 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:15:11,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:15:11,960 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:11,960 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:12,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:12,168 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:12,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:12,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-11 13:15:12,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:12,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973116379] [2020-10-11 13:15:12,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:12,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:12,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973116379] [2020-10-11 13:15:12,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192150310] [2020-10-11 13:15:12,318 INFO L93 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 [2020-10-11 13:15:12,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-11 13:15:12,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:12,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:15:12,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:12,385 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:12,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:12,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:15:12,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493978617] [2020-10-11 13:15:12,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:12,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:12,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:12,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:12,399 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-11 13:15:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:13,242 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-11 13:15:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:15:13,243 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:15:13,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:13,243 INFO L225 Difference]: With dead ends: 91 [2020-10-11 13:15:13,243 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 13:15:13,244 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 13:15:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 13:15:13,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-11 13:15:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:15:13,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:15:13,246 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-11 13:15:13,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:13,246 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:15:13,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:15:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:15:13,246 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:13,246 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:13,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:13,447 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:13,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:13,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-11 13:15:13,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:13,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132823443] [2020-10-11 13:15:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:13,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132823443] [2020-10-11 13:15:13,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043172020] [2020-10-11 13:15:13,590 INFO L93 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 [2020-10-11 13:15:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:13,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:15:13,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:13,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:13,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-11 13:15:13,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893817667] [2020-10-11 13:15:13,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-11 13:15:13,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:13,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-11 13:15:13,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-11 13:15:13,717 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-11 13:15:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:14,435 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-11 13:15:14,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:15:14,436 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-11 13:15:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:14,437 INFO L225 Difference]: With dead ends: 107 [2020-10-11 13:15:14,437 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:15:14,440 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:15:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:15:14,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-11 13:15:14,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-11 13:15:14,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-11 13:15:14,442 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-11 13:15:14,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:14,443 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-11 13:15:14,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-11 13:15:14,443 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-11 13:15:14,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:15:14,443 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:14,443 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:14,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-11 13:15:14,644 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:14,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:14,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-11 13:15:14,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:14,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988608787] [2020-10-11 13:15:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:14,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988608787] [2020-10-11 13:15:14,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703889695] [2020-10-11 13:15:14,799 INFO L93 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 [2020-10-11 13:15:14,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:14,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:14,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:15:14,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:14,871 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:14,884 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:14,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:14,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:15:14,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292994297] [2020-10-11 13:15:14,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:14,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:14,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:14,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:14,885 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-11 13:15:15,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:15,745 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-11 13:15:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:15:15,746 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:15:15,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:15,746 INFO L225 Difference]: With dead ends: 88 [2020-10-11 13:15:15,747 INFO L226 Difference]: Without dead ends: 80 [2020-10-11 13:15:15,747 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:15:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-11 13:15:15,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-11 13:15:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-11 13:15:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-11 13:15:15,749 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-11 13:15:15,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:15,749 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-11 13:15:15,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:15,749 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-11 13:15:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-11 13:15:15,749 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:15,749 INFO L421 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:15,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-11 13:15:15,950 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:15,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:15,951 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-11 13:15:15,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:15,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848670509] [2020-10-11 13:15:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:16,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848670509] [2020-10-11 13:15:16,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968478755] [2020-10-11 13:15:16,102 INFO L93 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 [2020-10-11 13:15:16,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-11 13:15:16,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:16,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-11 13:15:16,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:16,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:15:16,188 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:16,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:16,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-11 13:15:16,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510213362] [2020-10-11 13:15:16,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:16,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:16,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:16,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:16,191 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-11 13:15:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:16,983 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-11 13:15:16,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:15:16,984 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-11 13:15:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:16,985 INFO L225 Difference]: With dead ends: 100 [2020-10-11 13:15:16,985 INFO L226 Difference]: Without dead ends: 95 [2020-10-11 13:15:16,986 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:15:16,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-11 13:15:16,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-11 13:15:16,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 13:15:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-11 13:15:16,988 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-11 13:15:16,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:16,988 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-11 13:15:16,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:16,988 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-11 13:15:16,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:16,988 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:16,988 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:17,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-11 13:15:17,193 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:17,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:17,193 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-11 13:15:17,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:17,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803791035] [2020-10-11 13:15:17,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:17,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803791035] [2020-10-11 13:15:17,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669235392] [2020-10-11 13:15:17,360 INFO L93 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 [2020-10-11 13:15:17,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:17,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:17,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:17,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:17,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:15:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:17,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:17,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:17,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355747867] [2020-10-11 13:15:17,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:17,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:17,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:17,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:17,441 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-11 13:15:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:18,333 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-11 13:15:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:15:18,333 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:18,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:18,334 INFO L225 Difference]: With dead ends: 84 [2020-10-11 13:15:18,334 INFO L226 Difference]: Without dead ends: 79 [2020-10-11 13:15:18,335 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:15:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-11 13:15:18,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-11 13:15:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-11 13:15:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-11 13:15:18,337 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-11 13:15:18,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:18,337 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-11 13:15:18,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-11 13:15:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:18,337 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:18,337 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:18,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-11 13:15:18,538 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:18,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:18,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-11 13:15:18,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:18,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108451012] [2020-10-11 13:15:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:18,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108451012] [2020-10-11 13:15:18,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312771241] [2020-10-11 13:15:18,759 INFO L93 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 [2020-10-11 13:15:18,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:15:18,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:18,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:18,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:18,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:18,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:15:18,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129715528] [2020-10-11 13:15:18,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:18,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:18,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:18,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:18,819 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-11 13:15:19,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:19,154 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-11 13:15:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-11 13:15:19,155 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:15:19,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:19,156 INFO L225 Difference]: With dead ends: 90 [2020-10-11 13:15:19,156 INFO L226 Difference]: Without dead ends: 84 [2020-10-11 13:15:19,156 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-11 13:15:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-11 13:15:19,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-11 13:15:19,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 13:15:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-11 13:15:19,158 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-11 13:15:19,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:19,158 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-11 13:15:19,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:19,158 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-11 13:15:19,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:19,159 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:19,159 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:19,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:19,363 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:19,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:19,364 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-11 13:15:19,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:19,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961339644] [2020-10-11 13:15:19,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:19,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961339644] [2020-10-11 13:15:19,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242163282] [2020-10-11 13:15:19,592 INFO L93 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 [2020-10-11 13:15:19,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:15:19,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:19,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:19,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:19,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:19,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:19,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:19,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787517437] [2020-10-11 13:15:19,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:19,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:19,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:19,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:19,673 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-11 13:15:20,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:20,106 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-11 13:15:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-11 13:15:20,107 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:20,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:20,108 INFO L225 Difference]: With dead ends: 106 [2020-10-11 13:15:20,108 INFO L226 Difference]: Without dead ends: 100 [2020-10-11 13:15:20,109 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-11 13:15:20,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-11 13:15:20,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-11 13:15:20,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-11 13:15:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-11 13:15:20,111 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-11 13:15:20,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:20,112 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-11 13:15:20,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:20,112 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-11 13:15:20,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:20,112 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:20,112 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:20,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-11 13:15:20,316 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:20,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:20,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-11 13:15:20,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:20,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470591661] [2020-10-11 13:15:20,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:20,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470591661] [2020-10-11 13:15:20,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966271498] [2020-10-11 13:15:20,532 INFO L93 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 [2020-10-11 13:15:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:20,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:20,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:20,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:20,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:15:20,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981120139] [2020-10-11 13:15:20,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:20,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:20,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:20,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:20,588 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-11 13:15:21,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:21,051 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-11 13:15:21,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:15:21,052 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:15:21,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:21,052 INFO L225 Difference]: With dead ends: 107 [2020-10-11 13:15:21,052 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:15:21,053 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:15:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:15:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-11 13:15:21,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-11 13:15:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-11 13:15:21,055 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-11 13:15:21,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:21,056 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-11 13:15:21,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:21,056 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-11 13:15:21,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:21,056 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:21,056 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:21,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-11 13:15:21,265 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:21,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:21,265 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-11 13:15:21,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:21,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312110709] [2020-10-11 13:15:21,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:21,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312110709] [2020-10-11 13:15:21,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132163345] [2020-10-11 13:15:21,486 INFO L93 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 [2020-10-11 13:15:21,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:21,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:21,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:21,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:21,554 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:21,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:21,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:21,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917883595] [2020-10-11 13:15:21,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:21,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:21,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:21,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:21,565 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-11 13:15:22,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:22,061 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-11 13:15:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:15:22,062 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:22,062 INFO L225 Difference]: With dead ends: 119 [2020-10-11 13:15:22,062 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 13:15:22,062 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:15:22,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 13:15:22,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-11 13:15:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 13:15:22,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-11 13:15:22,065 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-11 13:15:22,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:22,065 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-11 13:15:22,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:22,065 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-11 13:15:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:22,065 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:22,065 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:22,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-11 13:15:22,266 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:22,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:22,267 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-11 13:15:22,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:22,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387729581] [2020-10-11 13:15:22,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:22,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387729581] [2020-10-11 13:15:22,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690052522] [2020-10-11 13:15:22,472 INFO L93 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 [2020-10-11 13:15:22,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 13:15:22,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:22,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:22,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:22,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:22,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:15:22,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830221904] [2020-10-11 13:15:22,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:22,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:22,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:22,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:22,534 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-11 13:15:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:23,040 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-11 13:15:23,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:15:23,041 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:15:23,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:23,042 INFO L225 Difference]: With dead ends: 119 [2020-10-11 13:15:23,042 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 13:15:23,042 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:15:23,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 13:15:23,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-11 13:15:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:15:23,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-11 13:15:23,044 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-11 13:15:23,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:23,044 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-11 13:15:23,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:23,044 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-11 13:15:23,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:23,044 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:23,044 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:23,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:23,245 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:23,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:23,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-11 13:15:23,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:23,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599725719] [2020-10-11 13:15:23,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:23,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599725719] [2020-10-11 13:15:23,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343000318] [2020-10-11 13:15:23,447 INFO L93 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 [2020-10-11 13:15:23,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:23,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:23,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:23,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:23,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:23,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:23,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:23,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41530845] [2020-10-11 13:15:23,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:23,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:23,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:23,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:23,536 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-11 13:15:24,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:24,119 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-11 13:15:24,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:15:24,120 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:24,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:24,120 INFO L225 Difference]: With dead ends: 116 [2020-10-11 13:15:24,121 INFO L226 Difference]: Without dead ends: 110 [2020-10-11 13:15:24,121 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:15:24,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-11 13:15:24,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-11 13:15:24,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:15:24,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-11 13:15:24,123 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-11 13:15:24,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:24,123 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-11 13:15:24,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:24,124 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-11 13:15:24,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:24,124 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:24,124 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:24,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:24,325 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:24,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:24,326 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-11 13:15:24,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:24,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628458608] [2020-10-11 13:15:24,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:24,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628458608] [2020-10-11 13:15:24,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136800019] [2020-10-11 13:15:24,519 INFO L93 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 [2020-10-11 13:15:24,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:15:24,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:24,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:24,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:24,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:24,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:15:24,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447045244] [2020-10-11 13:15:24,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:24,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:24,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:24,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:24,601 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-11 13:15:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:25,139 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-11 13:15:25,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:15:25,146 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:15:25,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:25,147 INFO L225 Difference]: With dead ends: 117 [2020-10-11 13:15:25,147 INFO L226 Difference]: Without dead ends: 111 [2020-10-11 13:15:25,147 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:15:25,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-11 13:15:25,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-11 13:15:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-11 13:15:25,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-11 13:15:25,149 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-11 13:15:25,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:25,149 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-11 13:15:25,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:25,149 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-11 13:15:25,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:25,150 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:25,150 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:25,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:25,351 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:25,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-11 13:15:25,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:25,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002264944] [2020-10-11 13:15:25,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:25,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002264944] [2020-10-11 13:15:25,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730386162] [2020-10-11 13:15:25,548 INFO L93 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 [2020-10-11 13:15:25,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:15:25,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:25,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:25,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:25,682 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:25,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:25,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:25,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295489597] [2020-10-11 13:15:25,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:25,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:25,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:25,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:25,703 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-11 13:15:26,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:26,410 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-11 13:15:26,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:15:26,411 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:26,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:26,412 INFO L225 Difference]: With dead ends: 114 [2020-10-11 13:15:26,412 INFO L226 Difference]: Without dead ends: 108 [2020-10-11 13:15:26,412 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:15:26,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-11 13:15:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-11 13:15:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:15:26,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-11 13:15:26,414 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-11 13:15:26,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:26,414 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-11 13:15:26,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-11 13:15:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:26,415 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:26,416 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:26,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-11 13:15:26,617 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:26,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:26,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-11 13:15:26,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:26,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789987901] [2020-10-11 13:15:26,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:26,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789987901] [2020-10-11 13:15:26,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611550033] [2020-10-11 13:15:26,799 INFO L93 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 [2020-10-11 13:15:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:26,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:26,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:26,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:26,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:15:26,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860004320] [2020-10-11 13:15:26,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:26,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:26,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:26,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:26,858 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-11 13:15:27,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:27,467 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-11 13:15:27,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:15:27,467 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:15:27,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:27,467 INFO L225 Difference]: With dead ends: 115 [2020-10-11 13:15:27,468 INFO L226 Difference]: Without dead ends: 109 [2020-10-11 13:15:27,468 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:15:27,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-11 13:15:27,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-11 13:15:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-11 13:15:27,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-11 13:15:27,470 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-11 13:15:27,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:27,471 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-11 13:15:27,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:27,471 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-11 13:15:27,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:27,471 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:27,471 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:27,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:27,678 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:27,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:27,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-11 13:15:27,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:27,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042353723] [2020-10-11 13:15:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:27,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:27,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042353723] [2020-10-11 13:15:27,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611733050] [2020-10-11 13:15:27,867 INFO L93 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 [2020-10-11 13:15:27,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:27,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:27,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:27,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:27,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:27,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:27,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:27,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445385429] [2020-10-11 13:15:27,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:27,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:27,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:27,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:27,947 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-11 13:15:28,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:28,695 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-11 13:15:28,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:15:28,696 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:28,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:28,696 INFO L225 Difference]: With dead ends: 112 [2020-10-11 13:15:28,696 INFO L226 Difference]: Without dead ends: 106 [2020-10-11 13:15:28,697 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:15:28,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-11 13:15:28,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-11 13:15:28,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-11 13:15:28,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-11 13:15:28,699 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-11 13:15:28,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:28,699 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-11 13:15:28,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-11 13:15:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:28,700 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:28,700 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:28,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-11 13:15:28,903 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:28,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:28,903 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-11 13:15:28,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:28,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611215117] [2020-10-11 13:15:28,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:29,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611215117] [2020-10-11 13:15:29,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732521130] [2020-10-11 13:15:29,091 INFO L93 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 [2020-10-11 13:15:29,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 13:15:29,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:29,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:29,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:29,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:29,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:15:29,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924703250] [2020-10-11 13:15:29,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:29,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:29,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:29,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:29,157 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-11 13:15:29,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:29,814 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-11 13:15:29,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:15:29,815 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:15:29,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:29,816 INFO L225 Difference]: With dead ends: 113 [2020-10-11 13:15:29,816 INFO L226 Difference]: Without dead ends: 107 [2020-10-11 13:15:29,816 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 13:15:29,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-11 13:15:29,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-11 13:15:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:15:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-11 13:15:29,818 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-11 13:15:29,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:29,819 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-11 13:15:29,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-11 13:15:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:29,819 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:29,819 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:30,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-11 13:15:30,020 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:30,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:30,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-11 13:15:30,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:30,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476191868] [2020-10-11 13:15:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:30,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476191868] [2020-10-11 13:15:30,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943680526] [2020-10-11 13:15:30,198 INFO L93 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 [2020-10-11 13:15:30,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:30,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:30,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:30,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:30,281 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:30,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:30,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:30,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584690710] [2020-10-11 13:15:30,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:30,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:30,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:30,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:30,297 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-11 13:15:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:31,125 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-11 13:15:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:15:31,126 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:31,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:31,126 INFO L225 Difference]: With dead ends: 110 [2020-10-11 13:15:31,127 INFO L226 Difference]: Without dead ends: 104 [2020-10-11 13:15:31,127 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:15:31,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-11 13:15:31,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-11 13:15:31,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:15:31,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-11 13:15:31,129 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-11 13:15:31,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:31,129 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-11 13:15:31,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:31,130 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-11 13:15:31,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:31,130 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:31,130 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:31,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-11 13:15:31,331 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:31,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:31,331 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-11 13:15:31,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:31,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38492127] [2020-10-11 13:15:31,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:31,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38492127] [2020-10-11 13:15:31,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052556816] [2020-10-11 13:15:31,506 INFO L93 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 [2020-10-11 13:15:31,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:15:31,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:31,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:31,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:31,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:31,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:15:31,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951360051] [2020-10-11 13:15:31,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:31,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:31,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:31,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:31,579 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-11 13:15:32,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:32,286 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-11 13:15:32,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:15:32,287 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:15:32,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:32,287 INFO L225 Difference]: With dead ends: 111 [2020-10-11 13:15:32,288 INFO L226 Difference]: Without dead ends: 105 [2020-10-11 13:15:32,288 INFO L673 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 [2020-10-11 13:15:32,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-11 13:15:32,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-11 13:15:32,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-11 13:15:32,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-11 13:15:32,290 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-11 13:15:32,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:32,290 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-11 13:15:32,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:32,290 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-11 13:15:32,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:32,290 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:32,291 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:32,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:32,491 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:32,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:32,492 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-11 13:15:32,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:32,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933378426] [2020-10-11 13:15:32,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:32,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933378426] [2020-10-11 13:15:32,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886999388] [2020-10-11 13:15:32,667 INFO L93 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 [2020-10-11 13:15:32,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:15:32,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:32,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:32,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:32,739 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:32,753 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:32,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:32,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:32,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708989408] [2020-10-11 13:15:32,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:32,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:32,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:32,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:32,755 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-11 13:15:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:33,671 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-11 13:15:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:15:33,672 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:33,672 INFO L225 Difference]: With dead ends: 108 [2020-10-11 13:15:33,672 INFO L226 Difference]: Without dead ends: 102 [2020-10-11 13:15:33,673 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:15:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-11 13:15:33,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-11 13:15:33,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 13:15:33,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-11 13:15:33,675 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-11 13:15:33,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:33,675 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-11 13:15:33,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:33,676 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-11 13:15:33,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:33,676 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:33,676 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:33,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-11 13:15:33,885 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-11 13:15:33,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:33,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138550044] [2020-10-11 13:15:33,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:34,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138550044] [2020-10-11 13:15:34,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269177494] [2020-10-11 13:15:34,058 INFO L93 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 [2020-10-11 13:15:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:34,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:34,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:34,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:34,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-11 13:15:34,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183956392] [2020-10-11 13:15:34,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-11 13:15:34,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:34,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-11 13:15:34,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-11 13:15:34,126 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-11 13:15:34,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:34,898 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-11 13:15:34,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:15:34,899 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-11 13:15:34,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:34,899 INFO L225 Difference]: With dead ends: 128 [2020-10-11 13:15:34,900 INFO L226 Difference]: Without dead ends: 122 [2020-10-11 13:15:34,900 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:15:34,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-11 13:15:34,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-11 13:15:34,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 13:15:34,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-11 13:15:34,903 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-11 13:15:34,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:34,903 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-11 13:15:34,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-11 13:15:34,903 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-11 13:15:34,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-11 13:15:34,903 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:34,903 INFO L421 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:35,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:35,110 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:35,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:35,111 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-11 13:15:35,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:35,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341254548] [2020-10-11 13:15:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:35,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341254548] [2020-10-11 13:15:35,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723778916] [2020-10-11 13:15:35,286 INFO L93 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 [2020-10-11 13:15:35,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:35,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:35,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-11 13:15:35,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:35,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:35,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:35,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-11 13:15:35,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159102465] [2020-10-11 13:15:35,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:35,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:35,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:35,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:35,370 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-11 13:15:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:36,303 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-11 13:15:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:15:36,304 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-11 13:15:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:36,304 INFO L225 Difference]: With dead ends: 109 [2020-10-11 13:15:36,304 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:15:36,305 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:15:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:15:36,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-11 13:15:36,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-11 13:15:36,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-11 13:15:36,306 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-11 13:15:36,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:36,307 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-11 13:15:36,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:36,307 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-11 13:15:36,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:36,307 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:36,307 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:36,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:36,508 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:36,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:36,509 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-11 13:15:36,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:36,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599978149] [2020-10-11 13:15:36,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:36,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599978149] [2020-10-11 13:15:36,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654511277] [2020-10-11 13:15:36,757 INFO L93 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 [2020-10-11 13:15:36,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 13:15:36,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:36,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:36,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:36,817 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:36,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:36,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:36,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878722372] [2020-10-11 13:15:36,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:36,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:36,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:36,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:36,818 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-11 13:15:37,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:37,263 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-11 13:15:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:15:37,263 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:37,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:37,264 INFO L225 Difference]: With dead ends: 124 [2020-10-11 13:15:37,264 INFO L226 Difference]: Without dead ends: 118 [2020-10-11 13:15:37,264 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-11 13:15:37,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-11 13:15:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-11 13:15:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:37,266 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:37,267 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:37,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:37,267 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:37,267 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:37,267 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:37,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:37,471 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:37,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:37,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-11 13:15:37,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:37,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471273059] [2020-10-11 13:15:37,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:37,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:37,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471273059] [2020-10-11 13:15:37,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207589995] [2020-10-11 13:15:37,778 INFO L93 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 [2020-10-11 13:15:37,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:37,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:37,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:37,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:37,866 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:37,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:37,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:37,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472347309] [2020-10-11 13:15:37,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:37,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:37,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:37,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:37,881 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:38,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:38,425 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-11 13:15:38,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:15:38,426 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:38,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:38,426 INFO L225 Difference]: With dead ends: 121 [2020-10-11 13:15:38,426 INFO L226 Difference]: Without dead ends: 115 [2020-10-11 13:15:38,427 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:15:38,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-11 13:15:38,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-11 13:15:38,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:38,429 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:38,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:38,430 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:38,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:38,430 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:38,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:38,430 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:38,430 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:38,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:38,631 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:38,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:38,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-11 13:15:38,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:38,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419992481] [2020-10-11 13:15:38,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:38,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419992481] [2020-10-11 13:15:38,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572249850] [2020-10-11 13:15:38,877 INFO L93 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 [2020-10-11 13:15:38,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:15:38,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:38,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:38,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:38,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:38,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:38,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079697658] [2020-10-11 13:15:38,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:38,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:38,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:38,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:38,943 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:39,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:39,428 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-11 13:15:39,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:15:39,428 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:39,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:39,429 INFO L225 Difference]: With dead ends: 118 [2020-10-11 13:15:39,429 INFO L226 Difference]: Without dead ends: 112 [2020-10-11 13:15:39,430 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-11 13:15:39,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-11 13:15:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-11 13:15:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:39,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:39,432 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:39,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:39,432 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:39,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:39,432 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:39,433 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:39,433 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:39,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:39,634 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:39,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:39,634 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-11 13:15:39,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:39,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485835681] [2020-10-11 13:15:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:39,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485835681] [2020-10-11 13:15:39,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596776639] [2020-10-11 13:15:39,867 INFO L93 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 [2020-10-11 13:15:39,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:15:39,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:39,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:39,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:39,936 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:39,949 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:39,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:39,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:39,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293537054] [2020-10-11 13:15:39,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:39,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:39,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:39,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:39,951 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:40,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:40,569 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-11 13:15:40,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:15:40,570 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:40,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:40,570 INFO L225 Difference]: With dead ends: 117 [2020-10-11 13:15:40,570 INFO L226 Difference]: Without dead ends: 111 [2020-10-11 13:15:40,571 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:15:40,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-11 13:15:40,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-11 13:15:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:40,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:40,573 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:40,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:40,573 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:40,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:40,574 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:40,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:40,574 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:40,574 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:40,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-11 13:15:40,775 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:40,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:40,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-11 13:15:40,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:40,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547974222] [2020-10-11 13:15:40,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:41,003 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:41,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547974222] [2020-10-11 13:15:41,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690869119] [2020-10-11 13:15:41,004 INFO L93 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 [2020-10-11 13:15:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:41,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:41,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:41,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:41,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:41,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907829403] [2020-10-11 13:15:41,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:41,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:41,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:41,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:41,072 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:41,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:41,633 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-11 13:15:41,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:15:41,634 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:41,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:41,635 INFO L225 Difference]: With dead ends: 114 [2020-10-11 13:15:41,635 INFO L226 Difference]: Without dead ends: 108 [2020-10-11 13:15:41,635 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:15:41,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-11 13:15:41,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-11 13:15:41,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:41,637 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:41,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:41,637 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:41,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:41,637 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:41,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:41,638 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:41,638 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:41,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-11 13:15:41,840 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:41,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:41,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-11 13:15:41,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:41,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010531113] [2020-10-11 13:15:41,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:42,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010531113] [2020-10-11 13:15:42,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012172149] [2020-10-11 13:15:42,069 INFO L93 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 [2020-10-11 13:15:42,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:42,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:42,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:42,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:42,135 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:42,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:42,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:42,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442681204] [2020-10-11 13:15:42,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:42,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:42,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:42,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:42,148 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:42,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:42,860 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-11 13:15:42,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:15:42,861 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:42,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:42,862 INFO L225 Difference]: With dead ends: 113 [2020-10-11 13:15:42,862 INFO L226 Difference]: Without dead ends: 107 [2020-10-11 13:15:42,863 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:15:42,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-11 13:15:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-11 13:15:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:42,865 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:42,865 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:42,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:42,866 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:42,866 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:43,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-11 13:15:43,075 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:43,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:43,076 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-11 13:15:43,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:43,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604123205] [2020-10-11 13:15:43,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:43,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604123205] [2020-10-11 13:15:43,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322259026] [2020-10-11 13:15:43,288 INFO L93 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 [2020-10-11 13:15:43,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 13:15:43,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:43,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:43,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:43,362 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:43,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:43,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:43,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818196740] [2020-10-11 13:15:43,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:43,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:43,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:43,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:43,364 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:44,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:44,000 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-11 13:15:44,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:15:44,001 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:44,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:44,002 INFO L225 Difference]: With dead ends: 110 [2020-10-11 13:15:44,002 INFO L226 Difference]: Without dead ends: 104 [2020-10-11 13:15:44,002 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:15:44,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-11 13:15:44,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-11 13:15:44,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:44,004 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:44,005 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:44,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:44,005 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:44,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:44,005 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:44,005 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:44,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-11 13:15:44,206 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:44,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-11 13:15:44,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:44,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478705512] [2020-10-11 13:15:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:44,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478705512] [2020-10-11 13:15:44,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206237616] [2020-10-11 13:15:44,429 INFO L93 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 [2020-10-11 13:15:44,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:44,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:44,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:44,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:44,497 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:44,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:44,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:44,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452239609] [2020-10-11 13:15:44,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:44,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:44,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:44,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:44,513 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:45,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:45,307 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-11 13:15:45,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:15:45,307 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:45,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:45,308 INFO L225 Difference]: With dead ends: 109 [2020-10-11 13:15:45,308 INFO L226 Difference]: Without dead ends: 103 [2020-10-11 13:15:45,309 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 13:15:45,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-11 13:15:45,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-11 13:15:45,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:45,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:45,311 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:45,311 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:45,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:45,311 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:45,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:45,311 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:45,311 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:45,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:45,512 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:45,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-11 13:15:45,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:45,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704919228] [2020-10-11 13:15:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:45,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704919228] [2020-10-11 13:15:45,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123044971] [2020-10-11 13:15:45,726 INFO L93 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 [2020-10-11 13:15:45,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:15:45,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:45,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:45,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:45,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:45,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:45,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903362696] [2020-10-11 13:15:45,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:45,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:45,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:45,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:45,798 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:46,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:46,474 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-11 13:15:46,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:15:46,475 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:46,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:46,475 INFO L225 Difference]: With dead ends: 106 [2020-10-11 13:15:46,475 INFO L226 Difference]: Without dead ends: 100 [2020-10-11 13:15:46,476 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:15:46,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-11 13:15:46,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-11 13:15:46,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:46,478 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:46,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:46,478 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:46,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:46,478 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:46,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:46,479 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:46,479 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:46,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-11 13:15:46,680 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:46,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:46,680 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-11 13:15:46,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:46,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392739333] [2020-10-11 13:15:46,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:46,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392739333] [2020-10-11 13:15:46,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687424027] [2020-10-11 13:15:46,893 INFO L93 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 [2020-10-11 13:15:46,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:15:46,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:46,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:46,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:46,967 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:46,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:46,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:46,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354435728] [2020-10-11 13:15:46,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:46,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:46,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:46,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:46,983 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:47,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:47,871 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-11 13:15:47,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:15:47,872 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:47,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:47,873 INFO L225 Difference]: With dead ends: 105 [2020-10-11 13:15:47,873 INFO L226 Difference]: Without dead ends: 99 [2020-10-11 13:15:47,873 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:15:47,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-11 13:15:47,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-11 13:15:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:47,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:47,875 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:47,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:47,876 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:47,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:47,876 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:47,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:47,876 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:47,876 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:48,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:48,077 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:48,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:48,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-11 13:15:48,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:48,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397198447] [2020-10-11 13:15:48,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:48,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397198447] [2020-10-11 13:15:48,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179863057] [2020-10-11 13:15:48,280 INFO L93 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 [2020-10-11 13:15:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:48,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:48,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:48,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:48,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:48,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630854152] [2020-10-11 13:15:48,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:48,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:48,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:48,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:48,363 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:49,106 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-11 13:15:49,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:15:49,107 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:49,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:49,108 INFO L225 Difference]: With dead ends: 102 [2020-10-11 13:15:49,108 INFO L226 Difference]: Without dead ends: 96 [2020-10-11 13:15:49,108 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:15:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-11 13:15:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-11 13:15:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:49,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:49,110 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:49,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:49,111 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:49,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:49,111 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:49,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:49,111 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:49,111 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:49,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:49,312 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:49,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:49,312 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-11 13:15:49,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:49,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069129089] [2020-10-11 13:15:49,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:49,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069129089] [2020-10-11 13:15:49,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463279918] [2020-10-11 13:15:49,513 INFO L93 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 [2020-10-11 13:15:49,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:49,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:49,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:49,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:49,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:49,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:49,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:49,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611302689] [2020-10-11 13:15:49,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:49,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:49,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:49,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:49,603 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:50,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:50,576 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-11 13:15:50,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:15:50,577 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:50,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:50,578 INFO L225 Difference]: With dead ends: 101 [2020-10-11 13:15:50,578 INFO L226 Difference]: Without dead ends: 95 [2020-10-11 13:15:50,578 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:15:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-11 13:15:50,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-11 13:15:50,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:50,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:50,580 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:50,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:50,580 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:50,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:50,581 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:50,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:50,581 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:50,581 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:50,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-11 13:15:50,784 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:50,785 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-11 13:15:50,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:50,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482209593] [2020-10-11 13:15:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:50,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482209593] [2020-10-11 13:15:50,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107184221] [2020-10-11 13:15:50,984 INFO L93 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 [2020-10-11 13:15:51,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-11 13:15:51,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:51,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:51,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:51,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:51,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:51,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297626602] [2020-10-11 13:15:51,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:51,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:51,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:51,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:51,056 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:51,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:51,860 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-11 13:15:51,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:15:51,861 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:51,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:51,861 INFO L225 Difference]: With dead ends: 98 [2020-10-11 13:15:51,861 INFO L226 Difference]: Without dead ends: 92 [2020-10-11 13:15:51,862 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:15:51,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-11 13:15:51,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-11 13:15:51,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:15:51,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:15:51,863 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-11 13:15:51,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:51,864 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:15:51,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:51,864 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:15:51,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:51,864 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:51,864 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:52,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:52,065 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:52,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:52,065 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-11 13:15:52,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:52,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799329225] [2020-10-11 13:15:52,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:52,260 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:52,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799329225] [2020-10-11 13:15:52,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002755306] [2020-10-11 13:15:52,260 INFO L93 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 [2020-10-11 13:15:52,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:15:52,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:52,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:52,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:52,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:15:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:52,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:52,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:52,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092391343] [2020-10-11 13:15:52,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:52,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:52,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:52,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:52,345 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-11 13:15:53,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:53,434 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-11 13:15:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:15:53,434 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:53,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:53,435 INFO L225 Difference]: With dead ends: 97 [2020-10-11 13:15:53,435 INFO L226 Difference]: Without dead ends: 91 [2020-10-11 13:15:53,436 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:15:53,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-11 13:15:53,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-11 13:15:53,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:15:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:15:53,438 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-11 13:15:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:53,438 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:15:53,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:15:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:53,438 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:53,439 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:53,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-11 13:15:53,639 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:53,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:53,640 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-11 13:15:53,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:53,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226910327] [2020-10-11 13:15:53,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:53,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226910327] [2020-10-11 13:15:53,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533708301] [2020-10-11 13:15:53,838 INFO L93 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 [2020-10-11 13:15:53,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-11 13:15:53,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:53,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:53,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:53,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:53,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-11 13:15:53,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521312349] [2020-10-11 13:15:53,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-11 13:15:53,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:53,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-11 13:15:53,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-11 13:15:53,907 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-11 13:15:54,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:54,773 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-11 13:15:54,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:15:54,774 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-11 13:15:54,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:54,774 INFO L225 Difference]: With dead ends: 113 [2020-10-11 13:15:54,774 INFO L226 Difference]: Without dead ends: 107 [2020-10-11 13:15:54,775 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:15:54,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-11 13:15:54,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-11 13:15:54,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-11 13:15:54,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-11 13:15:54,777 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-11 13:15:54,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:54,778 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-11 13:15:54,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-11 13:15:54,778 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-11 13:15:54,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:54,778 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:54,778 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:54,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-11 13:15:54,979 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:54,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:54,980 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-11 13:15:54,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:54,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861426231] [2020-10-11 13:15:54,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:55,177 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:55,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861426231] [2020-10-11 13:15:55,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445499532] [2020-10-11 13:15:55,178 INFO L93 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 [2020-10-11 13:15:55,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-11 13:15:55,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:55,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:55,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:55,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:55,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:55,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892429574] [2020-10-11 13:15:55,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:55,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:55,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:55,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:55,291 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-11 13:15:56,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:56,294 INFO L93 Difference]: Finished difference Result 92 states and 229 transitions. [2020-10-11 13:15:56,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:15:56,294 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:56,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:56,295 INFO L225 Difference]: With dead ends: 92 [2020-10-11 13:15:56,295 INFO L226 Difference]: Without dead ends: 84 [2020-10-11 13:15:56,295 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:15:56,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-11 13:15:56,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-10-11 13:15:56,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-11 13:15:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-11 13:15:56,297 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-11 13:15:56,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:56,298 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-11 13:15:56,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:56,298 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-11 13:15:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-11 13:15:56,298 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:56,298 INFO L421 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:56,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-11 13:15:56,499 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:56,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:56,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-11 13:15:56,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:56,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162580806] [2020-10-11 13:15:56,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:56,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162580806] [2020-10-11 13:15:56,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485249816] [2020-10-11 13:15:56,697 INFO L93 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 [2020-10-11 13:15:56,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:56,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-11 13:15:56,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:56,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:15:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:56,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:56,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-11 13:15:56,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293915800] [2020-10-11 13:15:56,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:15:56,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:56,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:15:56,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:15:56,786 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-11 13:15:57,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:57,815 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-11 13:15:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:15:57,815 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-11 13:15:57,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:57,816 INFO L225 Difference]: With dead ends: 108 [2020-10-11 13:15:57,816 INFO L226 Difference]: Without dead ends: 103 [2020-10-11 13:15:57,816 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:15:57,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-11 13:15:57,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-11 13:15:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 13:15:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-11 13:15:57,818 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-11 13:15:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:57,818 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-11 13:15:57,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:15:57,818 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-11 13:15:57,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:57,819 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:57,819 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:58,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-11 13:15:58,020 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:58,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:58,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-11 13:15:58,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:58,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184550644] [2020-10-11 13:15:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:58,239 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:58,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184550644] [2020-10-11 13:15:58,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454330896] [2020-10-11 13:15:58,240 INFO L93 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 [2020-10-11 13:15:58,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:15:58,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:15:58,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:15:58,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:15:58,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:15:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:58,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:15:58,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:15:58,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78103540] [2020-10-11 13:15:58,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:15:58,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:15:58,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:15:58,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:15:58,341 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-11 13:15:59,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:15:59,480 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-11 13:15:59,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:15:59,481 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:15:59,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:15:59,482 INFO L225 Difference]: With dead ends: 90 [2020-10-11 13:15:59,482 INFO L226 Difference]: Without dead ends: 85 [2020-10-11 13:15:59,482 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:15:59,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-11 13:15:59,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-11 13:15:59,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-11 13:15:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-11 13:15:59,484 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-11 13:15:59,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:15:59,484 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-11 13:15:59,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:15:59,485 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-11 13:15:59,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:15:59,485 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:15:59,485 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:15:59,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:15:59,686 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:15:59,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:15:59,686 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-11 13:15:59,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:15:59,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654409019] [2020-10-11 13:15:59,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:15:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:15:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:15:59,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654409019] [2020-10-11 13:15:59,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088555411] [2020-10-11 13:15:59,974 INFO L93 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 [2020-10-11 13:16:00,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:16:00,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:00,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:00,036 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:00,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:00,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:16:00,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971088342] [2020-10-11 13:16:00,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:16:00,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:00,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:16:00,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:16:00,037 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-11 13:16:00,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:00,465 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-11 13:16:00,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-11 13:16:00,466 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:16:00,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:00,466 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:16:00,467 INFO L226 Difference]: Without dead ends: 90 [2020-10-11 13:16:00,467 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-11 13:16:00,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-11 13:16:00,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-11 13:16:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:16:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-11 13:16:00,469 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-11 13:16:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:00,469 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-11 13:16:00,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:16:00,470 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-11 13:16:00,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:00,470 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:00,470 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:00,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:00,679 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:00,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:00,679 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-11 13:16:00,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:00,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237032346] [2020-10-11 13:16:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:00,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:00,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237032346] [2020-10-11 13:16:00,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442754087] [2020-10-11 13:16:00,976 INFO L93 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 [2020-10-11 13:16:01,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:01,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:01,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:01,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:01,043 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:01,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:01,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:16:01,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673943702] [2020-10-11 13:16:01,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:01,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:01,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:01,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:01,054 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-11 13:16:01,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:01,566 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-11 13:16:01,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-11 13:16:01,567 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:16:01,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:01,567 INFO L225 Difference]: With dead ends: 114 [2020-10-11 13:16:01,567 INFO L226 Difference]: Without dead ends: 108 [2020-10-11 13:16:01,568 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-11 13:16:01,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-11 13:16:01,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-11 13:16:01,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-11 13:16:01,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-11 13:16:01,570 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-11 13:16:01,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:01,570 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-11 13:16:01,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:01,570 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-11 13:16:01,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:01,571 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:01,571 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:01,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:01,772 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:01,772 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-11 13:16:01,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:01,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713837607] [2020-10-11 13:16:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:02,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713837607] [2020-10-11 13:16:02,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459970491] [2020-10-11 13:16:02,060 INFO L93 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 [2020-10-11 13:16:02,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:16:02,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:02,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:02,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:02,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:02,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:16:02,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479997416] [2020-10-11 13:16:02,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:16:02,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:02,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:16:02,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:16:02,122 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-11 13:16:02,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:02,685 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-11 13:16:02,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:16:02,686 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:16:02,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:02,687 INFO L225 Difference]: With dead ends: 115 [2020-10-11 13:16:02,687 INFO L226 Difference]: Without dead ends: 109 [2020-10-11 13:16:02,687 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:16:02,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-11 13:16:02,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-11 13:16:02,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-11 13:16:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-11 13:16:02,689 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-11 13:16:02,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:02,689 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-11 13:16:02,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:16:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-11 13:16:02,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:02,690 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:02,690 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:02,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:02,895 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:02,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:02,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-11 13:16:02,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:02,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604181084] [2020-10-11 13:16:02,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:03,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604181084] [2020-10-11 13:16:03,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011748797] [2020-10-11 13:16:03,181 INFO L93 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 [2020-10-11 13:16:03,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:16:03,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:03,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:03,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:03,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:03,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:03,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:16:03,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353650095] [2020-10-11 13:16:03,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:03,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:03,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:03,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:03,266 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-11 13:16:03,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:03,876 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-11 13:16:03,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:16:03,877 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:16:03,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:03,877 INFO L225 Difference]: With dead ends: 129 [2020-10-11 13:16:03,878 INFO L226 Difference]: Without dead ends: 123 [2020-10-11 13:16:03,878 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:16:03,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-11 13:16:03,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-11 13:16:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:16:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-11 13:16:03,880 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-11 13:16:03,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:03,880 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-11 13:16:03,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-11 13:16:03,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:03,881 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:03,881 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:04,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:04,090 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:04,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:04,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-11 13:16:04,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:04,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546442820] [2020-10-11 13:16:04,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:04,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546442820] [2020-10-11 13:16:04,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435729004] [2020-10-11 13:16:04,355 INFO L93 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 [2020-10-11 13:16:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:04,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:04,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:04,414 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:04,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:04,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:16:04,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631621101] [2020-10-11 13:16:04,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:16:04,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:04,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:16:04,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:16:04,415 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-11 13:16:05,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:05,015 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-11 13:16:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:16:05,015 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:16:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:05,016 INFO L225 Difference]: With dead ends: 129 [2020-10-11 13:16:05,016 INFO L226 Difference]: Without dead ends: 123 [2020-10-11 13:16:05,016 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:16:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-11 13:16:05,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-11 13:16:05,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-11 13:16:05,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-11 13:16:05,018 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-11 13:16:05,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:05,018 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-11 13:16:05,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:16:05,018 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-11 13:16:05,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:05,018 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:05,018 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:05,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:05,219 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:05,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-11 13:16:05,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:05,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190023861] [2020-10-11 13:16:05,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:05,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190023861] [2020-10-11 13:16:05,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491405309] [2020-10-11 13:16:05,495 INFO L93 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 [2020-10-11 13:16:05,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:05,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:05,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:05,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:05,565 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:05,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:05,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:16:05,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831986511] [2020-10-11 13:16:05,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:05,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:05,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:05,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:05,579 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-11 13:16:06,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:06,263 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-11 13:16:06,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:16:06,264 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:16:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:06,265 INFO L225 Difference]: With dead ends: 126 [2020-10-11 13:16:06,265 INFO L226 Difference]: Without dead ends: 120 [2020-10-11 13:16:06,266 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:16:06,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-11 13:16:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-11 13:16:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-11 13:16:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-11 13:16:06,268 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-11 13:16:06,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:06,269 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-11 13:16:06,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:06,269 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-11 13:16:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:06,269 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:06,269 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:06,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:06,470 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:06,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:06,471 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-11 13:16:06,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:06,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395125642] [2020-10-11 13:16:06,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:06,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395125642] [2020-10-11 13:16:06,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620914216] [2020-10-11 13:16:06,714 INFO L93 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 [2020-10-11 13:16:06,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:16:06,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:06,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:06,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:06,788 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:06,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:06,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:16:06,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340073875] [2020-10-11 13:16:06,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:16:06,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:06,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:16:06,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:16:06,789 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-11 13:16:07,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:07,492 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-11 13:16:07,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:16:07,493 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:16:07,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:07,494 INFO L225 Difference]: With dead ends: 127 [2020-10-11 13:16:07,494 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 13:16:07,494 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 13:16:07,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 13:16:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-11 13:16:07,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:16:07,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-11 13:16:07,495 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-11 13:16:07,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:07,496 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-11 13:16:07,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:16:07,496 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-11 13:16:07,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:07,496 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:07,496 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:07,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-11 13:16:07,697 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:07,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:07,697 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-11 13:16:07,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:07,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407139719] [2020-10-11 13:16:07,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:07,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407139719] [2020-10-11 13:16:07,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136512141] [2020-10-11 13:16:07,955 INFO L93 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 [2020-10-11 13:16:08,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:08,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:08,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:08,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:08,025 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:08,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:08,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:16:08,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092927430] [2020-10-11 13:16:08,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:08,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:08,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:08,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:08,041 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-11 13:16:08,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:08,843 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-11 13:16:08,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:16:08,844 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:16:08,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:08,844 INFO L225 Difference]: With dead ends: 124 [2020-10-11 13:16:08,844 INFO L226 Difference]: Without dead ends: 118 [2020-10-11 13:16:08,845 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:16:08,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-11 13:16:08,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-11 13:16:08,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:16:08,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-11 13:16:08,847 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-11 13:16:08,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:08,847 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-11 13:16:08,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:08,847 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-11 13:16:08,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:08,847 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:08,847 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:09,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-11 13:16:09,048 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:09,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:09,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-11 13:16:09,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:09,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567435661] [2020-10-11 13:16:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:09,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567435661] [2020-10-11 13:16:09,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243769762] [2020-10-11 13:16:09,291 INFO L93 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 [2020-10-11 13:16:09,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:16:09,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:09,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:09,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:09,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:09,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:16:09,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31517056] [2020-10-11 13:16:09,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:16:09,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:09,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:16:09,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:16:09,360 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-11 13:16:10,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:10,128 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-11 13:16:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:16:10,129 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:16:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:10,129 INFO L225 Difference]: With dead ends: 125 [2020-10-11 13:16:10,129 INFO L226 Difference]: Without dead ends: 119 [2020-10-11 13:16:10,129 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:16:10,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-11 13:16:10,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-11 13:16:10,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-11 13:16:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-11 13:16:10,132 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-11 13:16:10,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:10,132 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-11 13:16:10,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:16:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-11 13:16:10,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:10,132 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:10,133 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:10,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-11 13:16:10,333 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:10,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:10,334 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-11 13:16:10,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:10,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767456014] [2020-10-11 13:16:10,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:10,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767456014] [2020-10-11 13:16:10,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792545580] [2020-10-11 13:16:10,579 INFO L93 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 [2020-10-11 13:16:10,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:16:10,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:10,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:10,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:10,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:10,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:10,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:16:10,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575690172] [2020-10-11 13:16:10,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:10,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:10,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:10,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:10,668 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-11 13:16:11,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:11,567 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-11 13:16:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:16:11,568 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:16:11,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:11,569 INFO L225 Difference]: With dead ends: 122 [2020-10-11 13:16:11,569 INFO L226 Difference]: Without dead ends: 116 [2020-10-11 13:16:11,569 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:16:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-11 13:16:11,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-11 13:16:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 13:16:11,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-11 13:16:11,572 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-11 13:16:11,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:11,572 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-11 13:16:11,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:11,572 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-11 13:16:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:11,573 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:11,573 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:11,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-11 13:16:11,775 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:11,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:11,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-11 13:16:11,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:11,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306076741] [2020-10-11 13:16:11,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:12,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306076741] [2020-10-11 13:16:12,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332470206] [2020-10-11 13:16:12,008 INFO L93 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 [2020-10-11 13:16:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:12,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:12,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:12,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:12,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:16:12,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138364910] [2020-10-11 13:16:12,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:16:12,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:12,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:16:12,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:16:12,073 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-11 13:16:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:12,888 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-11 13:16:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:16:12,889 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:16:12,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:12,890 INFO L225 Difference]: With dead ends: 123 [2020-10-11 13:16:12,890 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 13:16:12,890 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:16:12,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 13:16:12,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-11 13:16:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-11 13:16:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-11 13:16:12,892 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-11 13:16:12,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:12,893 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-11 13:16:12,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:16:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-11 13:16:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:12,893 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:12,893 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:13,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:13,094 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:13,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:13,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-11 13:16:13,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:13,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802763756] [2020-10-11 13:16:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:13,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802763756] [2020-10-11 13:16:13,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23064921] [2020-10-11 13:16:13,351 INFO L93 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 [2020-10-11 13:16:13,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:13,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:13,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:13,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:13,422 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:13,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:13,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:16:13,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797589782] [2020-10-11 13:16:13,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:13,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:13,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:13,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:13,439 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-11 13:16:14,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:14,420 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-11 13:16:14,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:16:14,421 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:16:14,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:14,421 INFO L225 Difference]: With dead ends: 120 [2020-10-11 13:16:14,422 INFO L226 Difference]: Without dead ends: 114 [2020-10-11 13:16:14,422 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:16:14,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-11 13:16:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-11 13:16:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-11 13:16:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-11 13:16:14,424 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-11 13:16:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:14,424 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-11 13:16:14,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-11 13:16:14,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:14,425 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:14,425 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:14,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:14,625 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:14,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:14,626 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-11 13:16:14,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:14,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400671224] [2020-10-11 13:16:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:14,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400671224] [2020-10-11 13:16:14,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42072913] [2020-10-11 13:16:14,862 INFO L93 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 [2020-10-11 13:16:14,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:16:14,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:14,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:14,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:14,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:14,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:16:14,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464932529] [2020-10-11 13:16:14,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:16:14,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:14,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:16:14,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:16:14,936 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-11 13:16:15,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:15,819 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-11 13:16:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:16:15,820 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:16:15,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:15,820 INFO L225 Difference]: With dead ends: 121 [2020-10-11 13:16:15,820 INFO L226 Difference]: Without dead ends: 115 [2020-10-11 13:16:15,821 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:16:15,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-11 13:16:15,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-11 13:16:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:16:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-11 13:16:15,823 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-11 13:16:15,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:15,823 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-11 13:16:15,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:16:15,823 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-11 13:16:15,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:15,824 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:15,824 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:16,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-11 13:16:16,024 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:16,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:16,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-11 13:16:16,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:16,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4751530] [2020-10-11 13:16:16,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:16,247 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:16,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4751530] [2020-10-11 13:16:16,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580620953] [2020-10-11 13:16:16,247 INFO L93 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 [2020-10-11 13:16:16,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:16,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:16,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:16,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:16,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:16,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:16,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:16:16,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448454918] [2020-10-11 13:16:16,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:16,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:16,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:16,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:16,341 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-11 13:16:17,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:17,541 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-11 13:16:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:16:17,542 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:16:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:17,542 INFO L225 Difference]: With dead ends: 118 [2020-10-11 13:16:17,543 INFO L226 Difference]: Without dead ends: 112 [2020-10-11 13:16:17,543 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 13:16:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-11 13:16:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-11 13:16:17,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:16:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-11 13:16:17,545 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-11 13:16:17,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:17,545 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-11 13:16:17,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:17,546 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-11 13:16:17,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:17,546 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:17,546 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:17,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:17,747 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:17,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:17,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-11 13:16:17,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:17,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692879542] [2020-10-11 13:16:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:17,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692879542] [2020-10-11 13:16:17,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593959516] [2020-10-11 13:16:17,974 INFO L93 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 [2020-10-11 13:16:18,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:16:18,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:18,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:18,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:18,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:18,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:16:18,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156084170] [2020-10-11 13:16:18,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:16:18,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:18,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:16:18,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:16:18,053 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-11 13:16:18,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:18,982 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-11 13:16:18,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:16:18,983 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:16:18,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:18,984 INFO L225 Difference]: With dead ends: 119 [2020-10-11 13:16:18,984 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 13:16:18,984 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:16:18,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 13:16:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-11 13:16:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-11 13:16:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-11 13:16:18,988 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-11 13:16:18,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:18,989 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-11 13:16:18,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:16:18,989 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-11 13:16:18,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:18,989 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:18,989 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:19,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:19,190 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:19,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-11 13:16:19,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:19,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584127952] [2020-10-11 13:16:19,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:19,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:19,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584127952] [2020-10-11 13:16:19,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413976041] [2020-10-11 13:16:19,431 INFO L93 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 [2020-10-11 13:16:19,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:16:19,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:19,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:19,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:19,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:19,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:19,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:16:19,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227201396] [2020-10-11 13:16:19,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:19,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:19,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:19,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:19,538 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-11 13:16:20,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:20,718 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-11 13:16:20,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:16:20,719 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:16:20,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:20,719 INFO L225 Difference]: With dead ends: 116 [2020-10-11 13:16:20,719 INFO L226 Difference]: Without dead ends: 110 [2020-10-11 13:16:20,720 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:16:20,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-11 13:16:20,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-11 13:16:20,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 13:16:20,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-11 13:16:20,721 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-11 13:16:20,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:20,721 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-11 13:16:20,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:20,722 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-11 13:16:20,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:20,722 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:20,722 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:20,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:20,923 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:20,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:20,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-11 13:16:20,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:20,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429264137] [2020-10-11 13:16:20,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:21,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429264137] [2020-10-11 13:16:21,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165346088] [2020-10-11 13:16:21,152 INFO L93 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 [2020-10-11 13:16:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:21,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:21,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:21,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:21,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-11 13:16:21,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388240645] [2020-10-11 13:16:21,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-11 13:16:21,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:21,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-11 13:16:21,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-11 13:16:21,222 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-11 13:16:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:22,223 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-11 13:16:22,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:16:22,224 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-11 13:16:22,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:22,224 INFO L225 Difference]: With dead ends: 136 [2020-10-11 13:16:22,225 INFO L226 Difference]: Without dead ends: 130 [2020-10-11 13:16:22,225 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 13:16:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-11 13:16:22,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-11 13:16:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 13:16:22,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-11 13:16:22,228 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-11 13:16:22,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:22,228 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-11 13:16:22,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-11 13:16:22,229 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-11 13:16:22,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-11 13:16:22,229 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:22,229 INFO L421 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:22,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:22,437 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:22,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:22,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-11 13:16:22,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:22,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203852939] [2020-10-11 13:16:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:22,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203852939] [2020-10-11 13:16:22,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325488300] [2020-10-11 13:16:22,667 INFO L93 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 [2020-10-11 13:16:22,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:22,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:22,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-11 13:16:22,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:22,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:22,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:22,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-11 13:16:22,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424847614] [2020-10-11 13:16:22,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:22,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:22,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:22,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:22,763 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-11 13:16:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:24,002 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-11 13:16:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:16:24,003 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-11 13:16:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:24,004 INFO L225 Difference]: With dead ends: 117 [2020-10-11 13:16:24,004 INFO L226 Difference]: Without dead ends: 109 [2020-10-11 13:16:24,005 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:16:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-11 13:16:24,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-11 13:16:24,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-11 13:16:24,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-11 13:16:24,007 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-11 13:16:24,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:24,007 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-11 13:16:24,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:24,008 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-11 13:16:24,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:24,008 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:24,008 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:24,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:24,209 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:24,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:24,209 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-11 13:16:24,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:24,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508061583] [2020-10-11 13:16:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:24,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508061583] [2020-10-11 13:16:24,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746563988] [2020-10-11 13:16:24,530 INFO L93 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 [2020-10-11 13:16:24,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:16:24,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:24,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:24,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:24,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:24,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:24,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352068135] [2020-10-11 13:16:24,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:24,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:24,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:24,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:24,595 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-11 13:16:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:25,150 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-11 13:16:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:16:25,151 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:25,152 INFO L225 Difference]: With dead ends: 134 [2020-10-11 13:16:25,152 INFO L226 Difference]: Without dead ends: 128 [2020-10-11 13:16:25,152 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-11 13:16:25,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-11 13:16:25,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-11 13:16:25,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:25,154 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:25,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:25,155 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:25,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:25,155 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:25,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:25,155 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:25,155 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:25,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-11 13:16:25,356 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:25,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:25,356 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-11 13:16:25,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:25,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005475698] [2020-10-11 13:16:25,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:25,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:25,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005475698] [2020-10-11 13:16:25,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737858670] [2020-10-11 13:16:25,689 INFO L93 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 [2020-10-11 13:16:25,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:25,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:25,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:25,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:25,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:25,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:25,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:25,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116214896] [2020-10-11 13:16:25,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:25,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:25,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:25,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:25,774 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:26,393 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-11 13:16:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:16:26,394 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:26,394 INFO L225 Difference]: With dead ends: 131 [2020-10-11 13:16:26,394 INFO L226 Difference]: Without dead ends: 125 [2020-10-11 13:16:26,395 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:16:26,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-11 13:16:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-11 13:16:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:26,397 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:26,397 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:26,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:26,398 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:26,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:26,398 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:26,398 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:26,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-11 13:16:26,599 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:26,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:26,600 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-11 13:16:26,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:26,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851398469] [2020-10-11 13:16:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:26,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851398469] [2020-10-11 13:16:26,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225690462] [2020-10-11 13:16:26,913 INFO L93 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 [2020-10-11 13:16:26,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:16:26,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:26,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:26,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:26,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:26,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:26,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094422175] [2020-10-11 13:16:26,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:26,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:26,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:26,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:26,979 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:27,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:27,618 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-11 13:16:27,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:16:27,619 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:27,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:27,620 INFO L225 Difference]: With dead ends: 128 [2020-10-11 13:16:27,620 INFO L226 Difference]: Without dead ends: 122 [2020-10-11 13:16:27,621 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-11 13:16:27,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-11 13:16:27,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-11 13:16:27,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:27,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:27,623 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:27,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:27,623 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:27,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:27,624 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:27,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:27,624 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:27,624 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:27,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:27,825 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:27,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-11 13:16:27,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:27,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307364462] [2020-10-11 13:16:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:28,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307364462] [2020-10-11 13:16:28,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461595529] [2020-10-11 13:16:28,140 INFO L93 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 [2020-10-11 13:16:28,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:16:28,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:28,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:28,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:28,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:28,234 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:28,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:28,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:28,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953030847] [2020-10-11 13:16:28,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:28,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:28,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:28,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:28,235 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:29,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:29,007 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-11 13:16:29,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:16:29,007 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:29,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:29,008 INFO L225 Difference]: With dead ends: 127 [2020-10-11 13:16:29,008 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 13:16:29,009 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 13:16:29,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 13:16:29,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-11 13:16:29,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:29,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:29,010 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:29,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:29,010 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:29,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:29,010 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:29,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:29,011 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:29,011 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:29,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-11 13:16:29,212 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:29,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:29,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-11 13:16:29,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:29,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316698196] [2020-10-11 13:16:29,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:29,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316698196] [2020-10-11 13:16:29,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178382566] [2020-10-11 13:16:29,509 INFO L93 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 [2020-10-11 13:16:29,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:29,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:29,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:29,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:29,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:29,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327594403] [2020-10-11 13:16:29,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:29,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:29,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:29,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:29,581 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:30,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:30,324 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-11 13:16:30,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:16:30,325 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:30,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:30,325 INFO L225 Difference]: With dead ends: 124 [2020-10-11 13:16:30,326 INFO L226 Difference]: Without dead ends: 118 [2020-10-11 13:16:30,326 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:16:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-11 13:16:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-11 13:16:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:30,328 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:30,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:30,328 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:30,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:30,328 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:30,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:30,329 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:30,329 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:30,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:30,529 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:30,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:30,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-11 13:16:30,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:30,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949587697] [2020-10-11 13:16:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:30,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:30,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949587697] [2020-10-11 13:16:30,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462902323] [2020-10-11 13:16:30,820 INFO L93 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 [2020-10-11 13:16:30,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:30,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:30,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:30,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:30,895 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:30,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:30,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:30,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431051014] [2020-10-11 13:16:30,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:30,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:30,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:30,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:30,909 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:31,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:31,793 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-11 13:16:31,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:16:31,794 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:31,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:31,794 INFO L225 Difference]: With dead ends: 123 [2020-10-11 13:16:31,794 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 13:16:31,795 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:16:31,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 13:16:31,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-11 13:16:31,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:31,798 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:31,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:31,798 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:31,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:31,798 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:31,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:31,799 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:31,799 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:32,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:32,002 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:32,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:32,002 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-11 13:16:32,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:32,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044225160] [2020-10-11 13:16:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:32,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044225160] [2020-10-11 13:16:32,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725985869] [2020-10-11 13:16:32,270 INFO L93 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 [2020-10-11 13:16:32,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:16:32,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:32,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:32,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:32,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:32,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:32,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804626271] [2020-10-11 13:16:32,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:32,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:32,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:32,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:32,345 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:33,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:33,127 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-11 13:16:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:16:33,127 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:33,128 INFO L225 Difference]: With dead ends: 120 [2020-10-11 13:16:33,128 INFO L226 Difference]: Without dead ends: 114 [2020-10-11 13:16:33,129 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:16:33,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-11 13:16:33,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-11 13:16:33,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:33,131 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:33,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:33,131 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:33,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:33,131 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:33,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:33,131 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:33,131 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:33,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:33,332 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:33,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:33,333 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-11 13:16:33,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:33,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974154338] [2020-10-11 13:16:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:33,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974154338] [2020-10-11 13:16:33,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564622646] [2020-10-11 13:16:33,622 INFO L93 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 [2020-10-11 13:16:33,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:33,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:33,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:33,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:33,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:33,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:33,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:33,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798472446] [2020-10-11 13:16:33,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:33,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:33,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:33,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:33,722 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:34,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:34,684 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-11 13:16:34,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:16:34,685 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:34,686 INFO L225 Difference]: With dead ends: 119 [2020-10-11 13:16:34,686 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 13:16:34,687 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:16:34,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 13:16:34,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-11 13:16:34,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:34,690 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:34,690 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:34,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:34,691 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:34,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:34,691 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:34,691 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:34,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:34,892 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:34,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:34,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-11 13:16:34,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:34,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759065765] [2020-10-11 13:16:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:35,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759065765] [2020-10-11 13:16:35,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947005335] [2020-10-11 13:16:35,179 INFO L93 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 [2020-10-11 13:16:35,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:16:35,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:35,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:35,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:35,248 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:35,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:35,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:35,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852270248] [2020-10-11 13:16:35,249 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:35,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:35,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:35,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:35,250 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:36,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:36,101 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-11 13:16:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:16:36,102 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:36,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:36,102 INFO L225 Difference]: With dead ends: 116 [2020-10-11 13:16:36,102 INFO L226 Difference]: Without dead ends: 110 [2020-10-11 13:16:36,103 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:16:36,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-11 13:16:36,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-11 13:16:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:36,105 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:36,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:36,106 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:36,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:36,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:36,106 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:36,106 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:36,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-11 13:16:36,307 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:36,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:36,307 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-11 13:16:36,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:36,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502440584] [2020-10-11 13:16:36,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:36,598 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:36,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502440584] [2020-10-11 13:16:36,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026070785] [2020-10-11 13:16:36,598 INFO L93 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 [2020-10-11 13:16:36,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:16:36,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:36,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:36,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:36,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:36,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:36,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:36,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862778054] [2020-10-11 13:16:36,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:36,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:36,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:36,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:36,695 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:37,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:37,765 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-11 13:16:37,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:16:37,765 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:37,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:37,766 INFO L225 Difference]: With dead ends: 115 [2020-10-11 13:16:37,767 INFO L226 Difference]: Without dead ends: 109 [2020-10-11 13:16:37,767 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:16:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-11 13:16:37,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-11 13:16:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:37,770 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:37,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:37,770 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:37,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:37,770 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:37,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:37,770 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:37,771 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:37,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:37,979 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:37,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:37,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-11 13:16:37,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:37,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160671851] [2020-10-11 13:16:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:38,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160671851] [2020-10-11 13:16:38,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507094158] [2020-10-11 13:16:38,244 INFO L93 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 [2020-10-11 13:16:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:38,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:38,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:38,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:38,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:38,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174134234] [2020-10-11 13:16:38,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:38,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:38,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:38,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:38,312 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:39,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:39,273 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-11 13:16:39,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:16:39,273 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:39,274 INFO L225 Difference]: With dead ends: 112 [2020-10-11 13:16:39,274 INFO L226 Difference]: Without dead ends: 106 [2020-10-11 13:16:39,274 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:16:39,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-11 13:16:39,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-11 13:16:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:39,276 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:39,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:39,276 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:39,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:39,276 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:39,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:39,277 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:39,277 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:39,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-11 13:16:39,477 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:39,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:39,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-11 13:16:39,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:39,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994452480] [2020-10-11 13:16:39,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:39,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994452480] [2020-10-11 13:16:39,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840431055] [2020-10-11 13:16:39,756 INFO L93 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 [2020-10-11 13:16:39,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:39,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:39,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:39,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:39,834 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:39,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:39,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:39,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432140547] [2020-10-11 13:16:39,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:39,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:39,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:39,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:39,856 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:41,064 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-11 13:16:41,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:16:41,065 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:41,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:41,065 INFO L225 Difference]: With dead ends: 111 [2020-10-11 13:16:41,065 INFO L226 Difference]: Without dead ends: 105 [2020-10-11 13:16:41,066 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:16:41,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-11 13:16:41,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-11 13:16:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:41,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:41,068 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:41,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:41,068 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:41,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:41,069 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:41,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:41,069 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:41,069 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:41,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-11 13:16:41,274 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:41,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:41,274 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-11 13:16:41,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:41,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873036830] [2020-10-11 13:16:41,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:41,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873036830] [2020-10-11 13:16:41,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103289766] [2020-10-11 13:16:41,529 INFO L93 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 [2020-10-11 13:16:41,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:16:41,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:41,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:41,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:41,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:41,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:41,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401884045] [2020-10-11 13:16:41,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:41,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:41,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:41,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:41,605 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:42,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:42,643 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-11 13:16:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:16:42,644 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:42,645 INFO L225 Difference]: With dead ends: 108 [2020-10-11 13:16:42,645 INFO L226 Difference]: Without dead ends: 102 [2020-10-11 13:16:42,645 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 13:16:42,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-11 13:16:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-11 13:16:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:42,647 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:42,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:42,647 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:42,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:42,648 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:42,648 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:42,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:42,853 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:42,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:42,853 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-11 13:16:42,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:42,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689555139] [2020-10-11 13:16:42,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:43,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689555139] [2020-10-11 13:16:43,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260429182] [2020-10-11 13:16:43,120 INFO L93 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 [2020-10-11 13:16:43,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:43,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:43,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:43,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:43,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:43,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:43,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:43,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766078675] [2020-10-11 13:16:43,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:43,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:43,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:43,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:43,207 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:44,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:44,523 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-11 13:16:44,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:16:44,524 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:44,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:44,525 INFO L225 Difference]: With dead ends: 107 [2020-10-11 13:16:44,525 INFO L226 Difference]: Without dead ends: 101 [2020-10-11 13:16:44,525 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 13:16:44,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-11 13:16:44,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-11 13:16:44,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:44,528 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:44,528 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:44,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:44,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:44,529 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:44,529 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:44,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:44,733 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:44,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:44,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-11 13:16:44,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:44,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635029171] [2020-10-11 13:16:44,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:45,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635029171] [2020-10-11 13:16:45,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138077931] [2020-10-11 13:16:45,000 INFO L93 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 [2020-10-11 13:16:45,047 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-11 13:16:45,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:45,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:45,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:45,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:45,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:45,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237768047] [2020-10-11 13:16:45,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:45,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:45,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:45,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:45,075 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:46,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:46,156 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-11 13:16:46,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:16:46,157 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:46,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:46,158 INFO L225 Difference]: With dead ends: 104 [2020-10-11 13:16:46,158 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:16:46,158 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:16:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:16:46,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-11 13:16:46,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:16:46,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:16:46,160 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-11 13:16:46,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:46,161 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:16:46,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:46,161 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:16:46,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:46,161 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:46,161 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:46,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:46,362 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:46,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:46,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-11 13:16:46,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:46,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80686999] [2020-10-11 13:16:46,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:46,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80686999] [2020-10-11 13:16:46,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084538999] [2020-10-11 13:16:46,629 INFO L93 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 [2020-10-11 13:16:46,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-11 13:16:46,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:46,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:46,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:46,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:46,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:46,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:46,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470621595] [2020-10-11 13:16:46,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:46,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:46,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:46,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:46,737 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-11 13:16:48,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:48,179 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-11 13:16:48,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:16:48,180 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:48,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:48,180 INFO L225 Difference]: With dead ends: 103 [2020-10-11 13:16:48,180 INFO L226 Difference]: Without dead ends: 97 [2020-10-11 13:16:48,181 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-11 13:16:48,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-11 13:16:48,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-11 13:16:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:16:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:16:48,184 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-11 13:16:48,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:48,184 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:16:48,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:48,184 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:16:48,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:48,185 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:48,185 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:48,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-11 13:16:48,394 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:48,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:48,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-11 13:16:48,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:48,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908350373] [2020-10-11 13:16:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:48,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908350373] [2020-10-11 13:16:48,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357396754] [2020-10-11 13:16:48,664 INFO L93 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 [2020-10-11 13:16:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:48,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:48,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:48,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:48,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-11 13:16:48,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949015022] [2020-10-11 13:16:48,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-11 13:16:48,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:48,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-11 13:16:48,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-11 13:16:48,747 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-11 13:16:49,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:49,906 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-11 13:16:49,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:16:49,907 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-11 13:16:49,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:49,908 INFO L225 Difference]: With dead ends: 119 [2020-10-11 13:16:49,908 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 13:16:49,908 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:16:49,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 13:16:49,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-11 13:16:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-11 13:16:49,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-11 13:16:49,910 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-11 13:16:49,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:49,910 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-11 13:16:49,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-11 13:16:49,911 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-11 13:16:49,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:49,911 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:49,911 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:50,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:50,112 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:50,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:50,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-11 13:16:50,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:50,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237342036] [2020-10-11 13:16:50,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:50,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237342036] [2020-10-11 13:16:50,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218374254] [2020-10-11 13:16:50,388 INFO L93 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 [2020-10-11 13:16:50,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:16:50,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:50,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:50,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:50,462 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:50,481 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:50,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:50,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:50,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831509234] [2020-10-11 13:16:50,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:50,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:50,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:50,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:50,483 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-11 13:16:51,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:51,955 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-11 13:16:51,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 13:16:51,956 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:51,957 INFO L225 Difference]: With dead ends: 100 [2020-10-11 13:16:51,957 INFO L226 Difference]: Without dead ends: 92 [2020-10-11 13:16:51,957 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:16:51,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-11 13:16:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-11 13:16:51,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-11 13:16:51,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-11 13:16:51,959 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-11 13:16:51,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:51,959 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-11 13:16:51,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:51,960 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-11 13:16:51,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-11 13:16:51,960 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:51,960 INFO L421 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:52,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:52,161 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:52,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:52,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-11 13:16:52,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:52,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914033230] [2020-10-11 13:16:52,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:52,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914033230] [2020-10-11 13:16:52,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984889326] [2020-10-11 13:16:52,412 INFO L93 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 [2020-10-11 13:16:52,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-11 13:16:52,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:52,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-11 13:16:52,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:52,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:16:52,527 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:52,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:52,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-11 13:16:52,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162154547] [2020-10-11 13:16:52,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:52,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:52,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:52,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:52,529 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-11 13:16:53,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:53,923 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-11 13:16:53,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:16:53,923 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-11 13:16:53,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:53,924 INFO L225 Difference]: With dead ends: 116 [2020-10-11 13:16:53,924 INFO L226 Difference]: Without dead ends: 111 [2020-10-11 13:16:53,924 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:16:53,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-11 13:16:53,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-11 13:16:53,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 13:16:53,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-11 13:16:53,925 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-11 13:16:53,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:53,926 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-11 13:16:53,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:53,926 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-11 13:16:53,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:53,926 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:53,926 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:54,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:54,127 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:54,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:54,127 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-11 13:16:54,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:54,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339562333] [2020-10-11 13:16:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:54,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339562333] [2020-10-11 13:16:54,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157875572] [2020-10-11 13:16:54,413 INFO L93 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 [2020-10-11 13:16:54,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:16:54,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:54,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:54,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:54,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:16:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:54,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:54,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:54,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669515933] [2020-10-11 13:16:54,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:54,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:54,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:54,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:54,524 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-11 13:16:56,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:56,005 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-11 13:16:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:16:56,006 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:56,007 INFO L225 Difference]: With dead ends: 96 [2020-10-11 13:16:56,007 INFO L226 Difference]: Without dead ends: 91 [2020-10-11 13:16:56,007 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-11 13:16:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-11 13:16:56,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-11 13:16:56,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-11 13:16:56,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-11 13:16:56,010 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-11 13:16:56,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:56,010 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-11 13:16:56,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:56,011 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-11 13:16:56,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:56,011 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:56,011 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:56,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:16:56,217 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:56,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:56,218 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-11 13:16:56,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:56,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840758980] [2020-10-11 13:16:56,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:56,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840758980] [2020-10-11 13:16:56,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974528132] [2020-10-11 13:16:56,610 INFO L93 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 [2020-10-11 13:16:56,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:16:56,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:56,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:56,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:56,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:56,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:56,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166675621] [2020-10-11 13:16:56,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:56,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:56,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:56,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:56,671 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-11 13:16:57,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:57,287 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-11 13:16:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-11 13:16:57,288 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:16:57,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:57,288 INFO L225 Difference]: With dead ends: 102 [2020-10-11 13:16:57,288 INFO L226 Difference]: Without dead ends: 96 [2020-10-11 13:16:57,289 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-11 13:16:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-11 13:16:57,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-11 13:16:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:16:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-11 13:16:57,291 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-11 13:16:57,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:57,291 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-11 13:16:57,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:16:57,291 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-11 13:16:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:57,291 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:57,291 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:57,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-11 13:16:57,492 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:57,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:57,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-11 13:16:57,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:57,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034616957] [2020-10-11 13:16:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:57,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034616957] [2020-10-11 13:16:57,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637981862] [2020-10-11 13:16:57,891 INFO L93 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 [2020-10-11 13:16:57,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:16:57,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:16:57,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:57,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:57,971 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:16:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:57,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:57,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:16:57,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124343623] [2020-10-11 13:16:57,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:16:57,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:57,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:16:57,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:16:57,983 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-11 13:16:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:16:58,694 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-11 13:16:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-11 13:16:58,695 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:16:58,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:16:58,696 INFO L225 Difference]: With dead ends: 122 [2020-10-11 13:16:58,696 INFO L226 Difference]: Without dead ends: 116 [2020-10-11 13:16:58,696 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-11 13:16:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-11 13:16:58,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-11 13:16:58,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-11 13:16:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-11 13:16:58,698 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-11 13:16:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:16:58,698 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-11 13:16:58,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:16:58,699 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-11 13:16:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:16:58,699 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:16:58,699 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:16:58,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-11 13:16:58,900 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:16:58,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:16:58,900 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-11 13:16:58,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:16:58,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904949831] [2020-10-11 13:16:58,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:16:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:59,277 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:59,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904949831] [2020-10-11 13:16:59,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192631374] [2020-10-11 13:16:59,277 INFO L93 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 [2020-10-11 13:16:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:16:59,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:16:59,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:16:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:16:59,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:16:59,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:16:59,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229461299] [2020-10-11 13:16:59,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:16:59,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:16:59,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:16:59,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:16:59,338 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-11 13:17:00,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:00,098 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-11 13:17:00,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:17:00,099 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:17:00,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:00,100 INFO L225 Difference]: With dead ends: 123 [2020-10-11 13:17:00,100 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 13:17:00,100 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:17:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 13:17:00,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-11 13:17:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-11 13:17:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-11 13:17:00,102 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-11 13:17:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:00,103 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-11 13:17:00,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:17:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-11 13:17:00,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:00,103 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:00,103 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:00,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-11 13:17:00,304 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:00,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:00,304 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-11 13:17:00,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:00,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537251469] [2020-10-11 13:17:00,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:00,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537251469] [2020-10-11 13:17:00,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089449542] [2020-10-11 13:17:00,675 INFO L93 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 [2020-10-11 13:17:00,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:17:00,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:00,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:00,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:00,759 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:00,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:00,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:17:00,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880900215] [2020-10-11 13:17:00,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:00,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:00,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:00,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:00,776 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-11 13:17:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:01,597 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-11 13:17:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:17:01,598 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:17:01,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:01,599 INFO L225 Difference]: With dead ends: 139 [2020-10-11 13:17:01,599 INFO L226 Difference]: Without dead ends: 133 [2020-10-11 13:17:01,599 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:17:01,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-11 13:17:01,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-11 13:17:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:17:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-11 13:17:01,601 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-11 13:17:01,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:01,602 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-11 13:17:01,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:01,602 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-11 13:17:01,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:01,602 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:01,602 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:01,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-11 13:17:01,809 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:01,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:01,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-11 13:17:01,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:01,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044878779] [2020-10-11 13:17:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:02,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044878779] [2020-10-11 13:17:02,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142929730] [2020-10-11 13:17:02,177 INFO L93 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 [2020-10-11 13:17:02,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:17:02,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:02,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:02,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:02,249 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:02,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:02,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:17:02,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121594218] [2020-10-11 13:17:02,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:17:02,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:02,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:17:02,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:17:02,250 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-11 13:17:03,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:03,005 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-11 13:17:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:17:03,006 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:17:03,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:03,007 INFO L225 Difference]: With dead ends: 139 [2020-10-11 13:17:03,007 INFO L226 Difference]: Without dead ends: 133 [2020-10-11 13:17:03,008 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:17:03,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-11 13:17:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-11 13:17:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-11 13:17:03,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-11 13:17:03,010 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-11 13:17:03,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:03,010 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-11 13:17:03,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:17:03,010 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-11 13:17:03,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:03,011 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:03,011 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:03,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:03,211 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:03,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:03,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-11 13:17:03,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:03,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044331187] [2020-10-11 13:17:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:03,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044331187] [2020-10-11 13:17:03,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123076411] [2020-10-11 13:17:03,592 INFO L93 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 [2020-10-11 13:17:03,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:17:03,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:03,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:03,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:03,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:03,687 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:03,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:03,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:17:03,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112643019] [2020-10-11 13:17:03,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:03,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:03,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:03,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:03,688 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-11 13:17:04,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:04,592 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-11 13:17:04,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:17:04,593 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:17:04,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:04,594 INFO L225 Difference]: With dead ends: 136 [2020-10-11 13:17:04,594 INFO L226 Difference]: Without dead ends: 130 [2020-10-11 13:17:04,594 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:17:04,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-11 13:17:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-11 13:17:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 13:17:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-11 13:17:04,595 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-11 13:17:04,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:04,596 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-11 13:17:04,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:04,596 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-11 13:17:04,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:04,596 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:04,596 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:04,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-11 13:17:04,797 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:04,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:04,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-11 13:17:04,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:04,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653204858] [2020-10-11 13:17:04,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:05,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653204858] [2020-10-11 13:17:05,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910243441] [2020-10-11 13:17:05,155 INFO L93 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 [2020-10-11 13:17:05,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:17:05,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:05,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:05,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:05,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:05,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:17:05,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056647341] [2020-10-11 13:17:05,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:17:05,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:05,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:17:05,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:17:05,226 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-11 13:17:06,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:06,125 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-11 13:17:06,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:17:06,126 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:17:06,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:06,127 INFO L225 Difference]: With dead ends: 137 [2020-10-11 13:17:06,127 INFO L226 Difference]: Without dead ends: 131 [2020-10-11 13:17:06,127 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:17:06,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-11 13:17:06,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-11 13:17:06,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-11 13:17:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-11 13:17:06,130 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-11 13:17:06,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:06,130 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-11 13:17:06,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:17:06,130 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-11 13:17:06,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:06,130 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:06,130 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:06,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:06,331 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:06,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:06,332 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-11 13:17:06,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:06,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421853835] [2020-10-11 13:17:06,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:06,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421853835] [2020-10-11 13:17:06,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669429163] [2020-10-11 13:17:06,691 INFO L93 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 [2020-10-11 13:17:06,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:17:06,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:06,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:06,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:06,777 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:06,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:06,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:17:06,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556219138] [2020-10-11 13:17:06,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:06,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:06,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:06,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:06,794 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-11 13:17:07,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:07,837 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-11 13:17:07,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:17:07,838 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:17:07,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:07,838 INFO L225 Difference]: With dead ends: 134 [2020-10-11 13:17:07,838 INFO L226 Difference]: Without dead ends: 128 [2020-10-11 13:17:07,838 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:17:07,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-11 13:17:07,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-11 13:17:07,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-11 13:17:07,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-11 13:17:07,841 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-11 13:17:07,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:07,841 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-11 13:17:07,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:07,842 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-11 13:17:07,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:07,842 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:07,842 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:08,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-11 13:17:08,044 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:08,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:08,044 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-11 13:17:08,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:08,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9839124] [2020-10-11 13:17:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:08,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9839124] [2020-10-11 13:17:08,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262831675] [2020-10-11 13:17:08,376 INFO L93 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 [2020-10-11 13:17:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:08,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:08,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:08,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:08,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:17:08,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678108601] [2020-10-11 13:17:08,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:17:08,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:08,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:17:08,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:17:08,445 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-11 13:17:09,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:09,434 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-11 13:17:09,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:17:09,435 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:17:09,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:09,435 INFO L225 Difference]: With dead ends: 135 [2020-10-11 13:17:09,435 INFO L226 Difference]: Without dead ends: 129 [2020-10-11 13:17:09,435 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:17:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-11 13:17:09,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-11 13:17:09,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:17:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-11 13:17:09,437 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-11 13:17:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:09,437 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-11 13:17:09,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:17:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-11 13:17:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:09,438 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:09,438 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:09,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:09,638 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:09,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:09,639 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-11 13:17:09,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:09,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995477358] [2020-10-11 13:17:09,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:09,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995477358] [2020-10-11 13:17:09,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704740648] [2020-10-11 13:17:09,982 INFO L93 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 [2020-10-11 13:17:10,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:17:10,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:10,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:10,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:10,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:10,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:10,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:17:10,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597823344] [2020-10-11 13:17:10,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:10,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:10,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:10,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:10,085 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-11 13:17:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:11,207 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-11 13:17:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:17:11,208 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:17:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:11,208 INFO L225 Difference]: With dead ends: 132 [2020-10-11 13:17:11,208 INFO L226 Difference]: Without dead ends: 126 [2020-10-11 13:17:11,209 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 13:17:11,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-11 13:17:11,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-11 13:17:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:17:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-11 13:17:11,210 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-11 13:17:11,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:11,211 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-11 13:17:11,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:11,211 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-11 13:17:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:11,211 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:11,211 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:11,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:11,412 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:11,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:11,413 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-11 13:17:11,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:11,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31423024] [2020-10-11 13:17:11,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:11,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31423024] [2020-10-11 13:17:11,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666229957] [2020-10-11 13:17:11,743 INFO L93 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 [2020-10-11 13:17:11,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:17:11,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:11,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:11,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:11,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:11,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:17:11,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581233980] [2020-10-11 13:17:11,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:17:11,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:11,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:17:11,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:17:11,821 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-11 13:17:12,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:12,857 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-11 13:17:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:17:12,858 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:17:12,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:12,859 INFO L225 Difference]: With dead ends: 133 [2020-10-11 13:17:12,859 INFO L226 Difference]: Without dead ends: 127 [2020-10-11 13:17:12,859 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:17:12,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-11 13:17:12,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-11 13:17:12,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-11 13:17:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-11 13:17:12,861 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-11 13:17:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:12,861 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-11 13:17:12,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:17:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-11 13:17:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:12,862 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:12,862 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:13,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:13,063 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:13,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:13,063 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-11 13:17:13,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:13,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409360748] [2020-10-11 13:17:13,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:13,402 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:13,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409360748] [2020-10-11 13:17:13,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504968327] [2020-10-11 13:17:13,403 INFO L93 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 [2020-10-11 13:17:13,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:17:13,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:13,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:13,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:13,482 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:13,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:13,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:17:13,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009641567] [2020-10-11 13:17:13,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:13,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:13,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:13,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:13,503 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-11 13:17:14,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:14,743 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-11 13:17:14,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:17:14,744 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:17:14,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:14,744 INFO L225 Difference]: With dead ends: 130 [2020-10-11 13:17:14,744 INFO L226 Difference]: Without dead ends: 124 [2020-10-11 13:17:14,745 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:17:14,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-11 13:17:14,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-11 13:17:14,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 13:17:14,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-11 13:17:14,747 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-11 13:17:14,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:14,747 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-11 13:17:14,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:14,747 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-11 13:17:14,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:14,748 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:14,748 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:14,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:14,949 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-11 13:17:14,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:14,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181748316] [2020-10-11 13:17:14,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:15,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181748316] [2020-10-11 13:17:15,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486725332] [2020-10-11 13:17:15,281 INFO L93 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 [2020-10-11 13:17:15,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:17:15,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:15,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:15,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:15,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:15,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:17:15,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074211286] [2020-10-11 13:17:15,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:17:15,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:15,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:17:15,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:17:15,357 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-11 13:17:16,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:16,485 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-11 13:17:16,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:17:16,486 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:17:16,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:16,486 INFO L225 Difference]: With dead ends: 131 [2020-10-11 13:17:16,486 INFO L226 Difference]: Without dead ends: 125 [2020-10-11 13:17:16,487 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 13:17:16,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-11 13:17:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-11 13:17:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-11 13:17:16,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-11 13:17:16,489 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-11 13:17:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:16,489 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-11 13:17:16,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:17:16,489 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-11 13:17:16,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:16,489 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:16,489 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:16,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-11 13:17:16,690 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:16,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:16,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-11 13:17:16,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:16,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115843555] [2020-10-11 13:17:16,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:17,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115843555] [2020-10-11 13:17:17,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390627732] [2020-10-11 13:17:17,019 INFO L93 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 [2020-10-11 13:17:17,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:17:17,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:17,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:17,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:17,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:17,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:17,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:17:17,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899631846] [2020-10-11 13:17:17,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:17,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:17,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:17,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:17,126 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-11 13:17:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:18,504 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-11 13:17:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:17:18,505 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:17:18,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:18,505 INFO L225 Difference]: With dead ends: 128 [2020-10-11 13:17:18,505 INFO L226 Difference]: Without dead ends: 122 [2020-10-11 13:17:18,505 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:17:18,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-11 13:17:18,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-11 13:17:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-11 13:17:18,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-11 13:17:18,507 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-11 13:17:18,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:18,507 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-11 13:17:18,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:18,507 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-11 13:17:18,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:18,507 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:18,508 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:18,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-11 13:17:18,708 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:18,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:18,709 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-11 13:17:18,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:18,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890561480] [2020-10-11 13:17:18,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:19,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890561480] [2020-10-11 13:17:19,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596481541] [2020-10-11 13:17:19,013 INFO L93 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 [2020-10-11 13:17:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:19,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:19,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:19,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:19,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:17:19,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3376964] [2020-10-11 13:17:19,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:17:19,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:19,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:17:19,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:17:19,098 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-11 13:17:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:20,531 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-11 13:17:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:17:20,532 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:17:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:20,532 INFO L225 Difference]: With dead ends: 129 [2020-10-11 13:17:20,532 INFO L226 Difference]: Without dead ends: 123 [2020-10-11 13:17:20,533 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-11 13:17:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-11 13:17:20,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-11 13:17:20,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:17:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-11 13:17:20,535 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-11 13:17:20,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:20,535 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-11 13:17:20,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:17:20,535 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-11 13:17:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:20,536 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:20,536 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:20,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-11 13:17:20,736 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:20,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:20,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-11 13:17:20,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:20,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168615291] [2020-10-11 13:17:20,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:21,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168615291] [2020-10-11 13:17:21,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925563200] [2020-10-11 13:17:21,038 INFO L93 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 [2020-10-11 13:17:21,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:17:21,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:21,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:21,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:21,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:21,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:21,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:17:21,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309708765] [2020-10-11 13:17:21,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:21,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:21,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:21,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:21,140 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-11 13:17:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:22,666 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-11 13:17:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:17:22,668 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:17:22,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:22,668 INFO L225 Difference]: With dead ends: 126 [2020-10-11 13:17:22,668 INFO L226 Difference]: Without dead ends: 120 [2020-10-11 13:17:22,668 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-11 13:17:22,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-11 13:17:22,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-11 13:17:22,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:17:22,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-11 13:17:22,671 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-11 13:17:22,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:22,671 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-11 13:17:22,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:22,671 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-11 13:17:22,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:22,671 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:22,671 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:22,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-11 13:17:22,872 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:22,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:22,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-11 13:17:22,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:22,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18171900] [2020-10-11 13:17:22,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:23,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18171900] [2020-10-11 13:17:23,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944044683] [2020-10-11 13:17:23,201 INFO L93 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 [2020-10-11 13:17:23,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:17:23,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:23,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:23,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:23,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:23,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:17:23,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40458763] [2020-10-11 13:17:23,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:17:23,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:23,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:17:23,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:17:23,286 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-11 13:17:24,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:24,571 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-11 13:17:24,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 13:17:24,572 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:17:24,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:24,573 INFO L225 Difference]: With dead ends: 127 [2020-10-11 13:17:24,573 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 13:17:24,573 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:17:24,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 13:17:24,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-11 13:17:24,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-11 13:17:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-11 13:17:24,576 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-11 13:17:24,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:24,576 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-11 13:17:24,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:17:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-11 13:17:24,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:24,576 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:24,576 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:24,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:24,777 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:24,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:24,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-11 13:17:24,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:24,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078596961] [2020-10-11 13:17:24,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:25,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078596961] [2020-10-11 13:17:25,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892356617] [2020-10-11 13:17:25,109 INFO L93 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 [2020-10-11 13:17:25,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:17:25,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:25,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:25,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:25,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:25,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:25,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:17:25,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901423848] [2020-10-11 13:17:25,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:25,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:25,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:25,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:25,215 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-11 13:17:26,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:26,838 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-11 13:17:26,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 13:17:26,839 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:17:26,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:26,840 INFO L225 Difference]: With dead ends: 124 [2020-10-11 13:17:26,840 INFO L226 Difference]: Without dead ends: 118 [2020-10-11 13:17:26,840 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-11 13:17:26,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-11 13:17:26,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-11 13:17:26,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 13:17:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-11 13:17:26,843 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-11 13:17:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:26,843 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-11 13:17:26,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-11 13:17:26,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:26,843 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:26,843 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:27,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-11 13:17:27,044 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:27,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:27,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-11 13:17:27,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:27,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017140453] [2020-10-11 13:17:27,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:27,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:27,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017140453] [2020-10-11 13:17:27,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534650474] [2020-10-11 13:17:27,376 INFO L93 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 [2020-10-11 13:17:27,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:17:27,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:27,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:27,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:27,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:27,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-11 13:17:27,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906550371] [2020-10-11 13:17:27,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-11 13:17:27,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:27,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-11 13:17:27,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-11 13:17:27,460 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-11 13:17:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:28,827 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-11 13:17:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 13:17:28,828 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-11 13:17:28,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:28,828 INFO L225 Difference]: With dead ends: 144 [2020-10-11 13:17:28,828 INFO L226 Difference]: Without dead ends: 138 [2020-10-11 13:17:28,829 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-11 13:17:28,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-11 13:17:28,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-11 13:17:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-11 13:17:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-11 13:17:28,832 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-11 13:17:28,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:28,832 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-11 13:17:28,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-11 13:17:28,832 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-11 13:17:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-11 13:17:28,833 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:28,833 INFO L421 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:29,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:29,042 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:29,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:29,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-11 13:17:29,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:29,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899867343] [2020-10-11 13:17:29,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:29,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899867343] [2020-10-11 13:17:29,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776402921] [2020-10-11 13:17:29,372 INFO L93 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 [2020-10-11 13:17:29,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:17:29,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:29,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-11 13:17:29,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:29,463 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:29,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:29,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-11 13:17:29,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089394856] [2020-10-11 13:17:29,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:29,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:29,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:29,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:29,489 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-11 13:17:31,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:31,190 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-11 13:17:31,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-11 13:17:31,191 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-11 13:17:31,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:31,192 INFO L225 Difference]: With dead ends: 125 [2020-10-11 13:17:31,192 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 13:17:31,192 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 13:17:31,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 13:17:31,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-11 13:17:31,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-11 13:17:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-11 13:17:31,194 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-11 13:17:31,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:31,194 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-11 13:17:31,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-11 13:17:31,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:31,195 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:31,195 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:31,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-11 13:17:31,396 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:31,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:31,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-11 13:17:31,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:31,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373959469] [2020-10-11 13:17:31,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:31,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373959469] [2020-10-11 13:17:31,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313340638] [2020-10-11 13:17:31,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:31,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:31,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:31,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:31,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:17:31,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162027257] [2020-10-11 13:17:31,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:31,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:31,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:31,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:31,935 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-10-11 13:17:32,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:32,752 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-10-11 13:17:32,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:17:32,753 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:17:32,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:32,754 INFO L225 Difference]: With dead ends: 144 [2020-10-11 13:17:32,754 INFO L226 Difference]: Without dead ends: 138 [2020-10-11 13:17:32,754 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-10-11 13:17:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-11 13:17:32,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-10-11 13:17:32,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:17:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:17:32,757 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:17:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:32,757 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:17:32,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:32,758 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:17:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:32,758 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:32,758 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:32,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:32,959 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:32,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:32,959 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-10-11 13:17:32,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:32,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706373475] [2020-10-11 13:17:32,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:33,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706373475] [2020-10-11 13:17:33,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563174041] [2020-10-11 13:17:33,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:33,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:17:33,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:33,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:33,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:33,453 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:33,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:33,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:17:33,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558463020] [2020-10-11 13:17:33,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:17:33,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:33,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:17:33,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:17:33,467 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:17:34,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:34,333 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-10-11 13:17:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:17:34,334 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:17:34,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:34,335 INFO L225 Difference]: With dead ends: 141 [2020-10-11 13:17:34,335 INFO L226 Difference]: Without dead ends: 135 [2020-10-11 13:17:34,336 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:17:34,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-11 13:17:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-10-11 13:17:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:17:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:17:34,338 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:17:34,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:34,338 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:17:34,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:17:34,338 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:17:34,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:34,338 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:34,338 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:34,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-10-11 13:17:34,539 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:34,540 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-10-11 13:17:34,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:34,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868691001] [2020-10-11 13:17:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:34,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868691001] [2020-10-11 13:17:34,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713963351] [2020-10-11 13:17:34,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:35,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:17:35,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:35,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:35,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:35,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:35,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:17:35,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533774201] [2020-10-11 13:17:35,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:35,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:35,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:35,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:35,045 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:17:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:35,892 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-10-11 13:17:35,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:17:35,893 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:17:35,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:35,893 INFO L225 Difference]: With dead ends: 138 [2020-10-11 13:17:35,893 INFO L226 Difference]: Without dead ends: 132 [2020-10-11 13:17:35,894 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-10-11 13:17:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-11 13:17:35,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-10-11 13:17:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:17:35,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:17:35,896 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:17:35,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:35,896 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:17:35,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:17:35,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:35,897 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:35,897 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:36,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:36,097 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:36,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:36,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-10-11 13:17:36,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:36,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605327952] [2020-10-11 13:17:36,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:36,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605327952] [2020-10-11 13:17:36,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493619051] [2020-10-11 13:17:36,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:36,550 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:17:36,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:36,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:36,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:36,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:36,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:36,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:17:36,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086802671] [2020-10-11 13:17:36,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:17:36,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:36,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:17:36,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:17:36,598 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:17:37,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:37,576 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-11 13:17:37,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:17:37,577 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:17:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:37,578 INFO L225 Difference]: With dead ends: 137 [2020-10-11 13:17:37,578 INFO L226 Difference]: Without dead ends: 131 [2020-10-11 13:17:37,578 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:17:37,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-11 13:17:37,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-10-11 13:17:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:17:37,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:17:37,580 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:17:37,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:37,581 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:17:37,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:17:37,581 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:17:37,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:37,581 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:37,581 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:37,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-10-11 13:17:37,782 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:37,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:37,782 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-10-11 13:17:37,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:37,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445894323] [2020-10-11 13:17:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:38,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445894323] [2020-10-11 13:17:38,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81784887] [2020-10-11 13:17:38,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:38,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:17:38,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:38,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:38,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:38,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:38,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:17:38,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007222267] [2020-10-11 13:17:38,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:38,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:38,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:38,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:38,277 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:17:39,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:39,187 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-11 13:17:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:17:39,189 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:17:39,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:39,189 INFO L225 Difference]: With dead ends: 134 [2020-10-11 13:17:39,189 INFO L226 Difference]: Without dead ends: 128 [2020-10-11 13:17:39,190 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:17:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-11 13:17:39,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-10-11 13:17:39,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:17:39,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:17:39,192 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:17:39,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:39,192 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:17:39,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:39,192 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:17:39,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:39,193 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:39,193 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:39,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-11 13:17:39,401 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:39,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:39,402 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-10-11 13:17:39,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:39,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862722188] [2020-10-11 13:17:39,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:39,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862722188] [2020-10-11 13:17:39,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637394008] [2020-10-11 13:17:39,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:39,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:17:39,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:39,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:39,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:39,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:39,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:39,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:17:39,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880616654] [2020-10-11 13:17:39,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:17:39,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:39,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:17:39,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:17:39,913 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:17:40,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:40,946 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-10-11 13:17:40,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:17:40,947 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:17:40,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:40,948 INFO L225 Difference]: With dead ends: 133 [2020-10-11 13:17:40,948 INFO L226 Difference]: Without dead ends: 127 [2020-10-11 13:17:40,948 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:17:40,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-11 13:17:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-10-11 13:17:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:17:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:17:40,951 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:17:40,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:40,951 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:17:40,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:17:40,951 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:17:40,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:40,951 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:40,951 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:41,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-11 13:17:41,156 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:41,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:41,156 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-10-11 13:17:41,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:41,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980686417] [2020-10-11 13:17:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:41,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980686417] [2020-10-11 13:17:41,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628503052] [2020-10-11 13:17:41,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:41,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:41,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:41,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:41,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:17:41,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179290676] [2020-10-11 13:17:41,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:41,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:41,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:41,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:41,596 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:17:42,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:42,586 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-10-11 13:17:42,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:17:42,587 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:17:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:42,588 INFO L225 Difference]: With dead ends: 130 [2020-10-11 13:17:42,588 INFO L226 Difference]: Without dead ends: 124 [2020-10-11 13:17:42,588 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:17:42,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-11 13:17:42,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-10-11 13:17:42,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:17:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:17:42,591 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:17:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:42,591 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:17:42,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:42,591 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:17:42,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:42,592 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:42,592 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:42,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:42,793 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:42,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:42,794 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-10-11 13:17:42,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:42,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641336722] [2020-10-11 13:17:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:42,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:43,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641336722] [2020-10-11 13:17:43,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649735559] [2020-10-11 13:17:43,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:43,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:17:43,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:43,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:43,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:43,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:43,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:43,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:17:43,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450448287] [2020-10-11 13:17:43,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:17:43,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:43,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:17:43,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:17:43,309 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:17:44,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:44,484 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-10-11 13:17:44,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:17:44,485 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:17:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:44,485 INFO L225 Difference]: With dead ends: 129 [2020-10-11 13:17:44,485 INFO L226 Difference]: Without dead ends: 123 [2020-10-11 13:17:44,486 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:17:44,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-11 13:17:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-10-11 13:17:44,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:17:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:17:44,488 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:17:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:44,488 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:17:44,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:17:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:17:44,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:44,489 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:44,489 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:44,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-11 13:17:44,690 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:44,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:44,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-10-11 13:17:44,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:44,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762619009] [2020-10-11 13:17:44,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:45,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762619009] [2020-10-11 13:17:45,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726175922] [2020-10-11 13:17:45,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:45,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:17:45,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:45,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:45,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:45,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:45,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:17:45,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816694475] [2020-10-11 13:17:45,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:45,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:45,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:45,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:45,131 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:17:46,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:46,212 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-10-11 13:17:46,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:17:46,214 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:17:46,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:46,214 INFO L225 Difference]: With dead ends: 126 [2020-10-11 13:17:46,214 INFO L226 Difference]: Without dead ends: 120 [2020-10-11 13:17:46,215 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 13:17:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-11 13:17:46,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-10-11 13:17:46,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:17:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:17:46,217 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:17:46,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:46,218 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:17:46,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:46,218 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:17:46,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:46,218 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:46,218 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:46,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:46,419 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:46,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:46,420 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-10-11 13:17:46,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:46,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943457342] [2020-10-11 13:17:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:46,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943457342] [2020-10-11 13:17:46,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698787781] [2020-10-11 13:17:46,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:46,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:17:46,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:46,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:46,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:46,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:46,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:46,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:17:46,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433729961] [2020-10-11 13:17:46,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:17:46,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:46,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:17:46,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:17:46,903 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:17:48,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:48,197 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-10-11 13:17:48,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:17:48,198 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:17:48,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:48,198 INFO L225 Difference]: With dead ends: 125 [2020-10-11 13:17:48,198 INFO L226 Difference]: Without dead ends: 119 [2020-10-11 13:17:48,199 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 13:17:48,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-11 13:17:48,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-10-11 13:17:48,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:17:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:17:48,201 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:17:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:48,201 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:17:48,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:17:48,201 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:17:48,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:48,202 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:48,202 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:48,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-10-11 13:17:48,404 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:48,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:48,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-10-11 13:17:48,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:48,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477052410] [2020-10-11 13:17:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:48,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477052410] [2020-10-11 13:17:48,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873507856] [2020-10-11 13:17:48,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:48,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:17:48,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:48,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:48,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:48,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:48,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:17:48,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762273079] [2020-10-11 13:17:48,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:48,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:48,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:48,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:48,832 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:17:49,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:49,965 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-10-11 13:17:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:17:49,966 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:17:49,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:49,967 INFO L225 Difference]: With dead ends: 122 [2020-10-11 13:17:49,967 INFO L226 Difference]: Without dead ends: 116 [2020-10-11 13:17:49,968 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:17:49,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-11 13:17:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-10-11 13:17:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:17:49,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:17:49,970 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:17:49,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:49,970 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:17:49,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:49,971 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:17:49,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:49,971 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:49,971 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:50,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:50,177 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:50,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:50,177 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-10-11 13:17:50,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:50,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169208461] [2020-10-11 13:17:50,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:50,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169208461] [2020-10-11 13:17:50,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894587814] [2020-10-11 13:17:50,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:50,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:17:50,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:50,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:50,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:50,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:50,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:50,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:17:50,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120878573] [2020-10-11 13:17:50,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:17:50,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:50,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:17:50,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:17:50,639 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:17:52,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:52,041 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-10-11 13:17:52,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:17:52,042 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:17:52,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:52,043 INFO L225 Difference]: With dead ends: 121 [2020-10-11 13:17:52,043 INFO L226 Difference]: Without dead ends: 115 [2020-10-11 13:17:52,043 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-10-11 13:17:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-11 13:17:52,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-10-11 13:17:52,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:17:52,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:17:52,045 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:17:52,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:52,045 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:17:52,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:17:52,046 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:17:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:52,046 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:52,046 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:52,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-10-11 13:17:52,247 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:52,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:52,247 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-10-11 13:17:52,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:52,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306444794] [2020-10-11 13:17:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:52,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306444794] [2020-10-11 13:17:52,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140945006] [2020-10-11 13:17:52,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:52,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:52,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:52,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:52,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:17:52,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721581213] [2020-10-11 13:17:52,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:52,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:52,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:52,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:52,663 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:17:53,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:53,922 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-10-11 13:17:53,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:17:53,924 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:17:53,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:53,924 INFO L225 Difference]: With dead ends: 118 [2020-10-11 13:17:53,924 INFO L226 Difference]: Without dead ends: 112 [2020-10-11 13:17:53,925 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:17:53,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-11 13:17:53,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-10-11 13:17:53,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:17:53,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:17:53,927 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:17:53,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:53,927 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:17:53,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:53,928 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:17:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:53,928 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:53,928 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:54,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:54,129 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:54,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:54,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-10-11 13:17:54,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:54,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865575315] [2020-10-11 13:17:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:54,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865575315] [2020-10-11 13:17:54,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385201387] [2020-10-11 13:17:54,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:54,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:17:54,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:54,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:54,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:54,562 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:54,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:54,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:17:54,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40286140] [2020-10-11 13:17:54,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:17:54,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:54,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:17:54,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:17:54,583 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:17:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:56,115 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-10-11 13:17:56,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:17:56,116 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:17:56,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:56,116 INFO L225 Difference]: With dead ends: 117 [2020-10-11 13:17:56,116 INFO L226 Difference]: Without dead ends: 111 [2020-10-11 13:17:56,117 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:17:56,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-11 13:17:56,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-10-11 13:17:56,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:17:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:17:56,118 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:17:56,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:56,118 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:17:56,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:17:56,118 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:17:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:56,119 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:56,119 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:56,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:56,319 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:56,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:56,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-10-11 13:17:56,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:56,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187499656] [2020-10-11 13:17:56,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:56,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187499656] [2020-10-11 13:17:56,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874529242] [2020-10-11 13:17:56,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:56,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:17:56,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:56,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:56,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:56,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:56,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:17:56,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861180140] [2020-10-11 13:17:56,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:17:56,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:56,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:17:56,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:17:56,749 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:17:58,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:17:58,063 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-10-11 13:17:58,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:17:58,064 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:17:58,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:17:58,065 INFO L225 Difference]: With dead ends: 114 [2020-10-11 13:17:58,065 INFO L226 Difference]: Without dead ends: 108 [2020-10-11 13:17:58,065 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-11 13:17:58,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-11 13:17:58,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-10-11 13:17:58,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:17:58,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:17:58,067 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:17:58,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:17:58,068 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:17:58,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:17:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:17:58,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:17:58,068 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:17:58,068 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:17:58,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-11 13:17:58,269 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:17:58,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:17:58,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-10-11 13:17:58,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:17:58,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187165966] [2020-10-11 13:17:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:17:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:17:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:58,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187165966] [2020-10-11 13:17:58,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377554775] [2020-10-11 13:17:58,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:17:58,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:17:58,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:17:58,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:17:58,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:17:58,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:17:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:17:58,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:17:58,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:17:58,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475771394] [2020-10-11 13:17:58,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:17:58,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:17:58,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:17:58,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:17:58,720 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:18:00,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:00,402 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-11 13:18:00,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 13:18:00,403 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:18:00,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:00,403 INFO L225 Difference]: With dead ends: 113 [2020-10-11 13:18:00,404 INFO L226 Difference]: Without dead ends: 107 [2020-10-11 13:18:00,404 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-10-11 13:18:00,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-11 13:18:00,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-10-11 13:18:00,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:18:00,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:18:00,406 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:18:00,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:00,407 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:18:00,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:18:00,407 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:18:00,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:18:00,407 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:00,407 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:00,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-11 13:18:00,608 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:00,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:00,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-10-11 13:18:00,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:00,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824690316] [2020-10-11 13:18:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:00,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:00,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824690316] [2020-10-11 13:18:00,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936295472] [2020-10-11 13:18:00,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:01,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-11 13:18:01,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:01,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:18:01,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:01,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:01,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:18:01,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792979905] [2020-10-11 13:18:01,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:18:01,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:01,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:18:01,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:18:01,048 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:18:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:02,511 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-10-11 13:18:02,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 13:18:02,512 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:18:02,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:02,513 INFO L225 Difference]: With dead ends: 110 [2020-10-11 13:18:02,513 INFO L226 Difference]: Without dead ends: 104 [2020-10-11 13:18:02,513 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-10-11 13:18:02,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-11 13:18:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-10-11 13:18:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:18:02,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:18:02,516 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-10-11 13:18:02,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:02,516 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:18:02,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:18:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:18:02,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:18:02,516 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:02,516 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:02,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-11 13:18:02,717 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:02,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:02,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-10-11 13:18:02,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:02,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755049096] [2020-10-11 13:18:02,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:02,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:03,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755049096] [2020-10-11 13:18:03,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376899959] [2020-10-11 13:18:03,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:03,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-11 13:18:03,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:03,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:18:03,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:03,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:18:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:03,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:03,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:18:03,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22005725] [2020-10-11 13:18:03,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:18:03,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:03,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:18:03,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:18:03,167 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-10-11 13:18:04,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:04,988 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-10-11 13:18:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-11 13:18:04,989 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:18:04,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:04,989 INFO L225 Difference]: With dead ends: 109 [2020-10-11 13:18:04,989 INFO L226 Difference]: Without dead ends: 103 [2020-10-11 13:18:04,990 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-10-11 13:18:04,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-11 13:18:04,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-10-11 13:18:04,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:18:04,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:18:04,991 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-10-11 13:18:04,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:04,992 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:18:04,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:18:04,992 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:18:04,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:18:04,992 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:04,992 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:05,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-11 13:18:05,193 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:05,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:05,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-10-11 13:18:05,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:05,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712394854] [2020-10-11 13:18:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:05,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712394854] [2020-10-11 13:18:05,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119280696] [2020-10-11 13:18:05,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:05,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:18:05,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:05,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:05,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-10-11 13:18:05,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007898335] [2020-10-11 13:18:05,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-11 13:18:05,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:05,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-11 13:18:05,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-10-11 13:18:05,637 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-10-11 13:18:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:07,110 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-10-11 13:18:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 13:18:07,112 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-10-11 13:18:07,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:07,112 INFO L225 Difference]: With dead ends: 125 [2020-10-11 13:18:07,112 INFO L226 Difference]: Without dead ends: 119 [2020-10-11 13:18:07,113 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 13:18:07,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-11 13:18:07,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-10-11 13:18:07,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-11 13:18:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-10-11 13:18:07,115 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-10-11 13:18:07,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:07,116 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-10-11 13:18:07,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-11 13:18:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-10-11 13:18:07,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:18:07,116 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:07,116 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:07,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-11 13:18:07,317 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:07,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:07,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-10-11 13:18:07,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:07,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531937614] [2020-10-11 13:18:07,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:07,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531937614] [2020-10-11 13:18:07,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140925890] [2020-10-11 13:18:07,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:07,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:18:07,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:07,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:18:07,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:07,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:18:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:07,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:07,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:18:07,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18280551] [2020-10-11 13:18:07,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:18:07,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:07,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:18:07,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:18:07,756 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-10-11 13:18:09,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:09,573 INFO L93 Difference]: Finished difference Result 106 states and 265 transitions. [2020-10-11 13:18:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-11 13:18:09,574 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:18:09,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:09,574 INFO L225 Difference]: With dead ends: 106 [2020-10-11 13:18:09,574 INFO L226 Difference]: Without dead ends: 98 [2020-10-11 13:18:09,575 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-10-11 13:18:09,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-11 13:18:09,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-11 13:18:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-11 13:18:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-10-11 13:18:09,577 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-10-11 13:18:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:09,577 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-10-11 13:18:09,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:18:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-10-11 13:18:09,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-11 13:18:09,578 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:09,578 INFO L421 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:09,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:09,779 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:09,779 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-10-11 13:18:09,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:09,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052988834] [2020-10-11 13:18:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:10,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052988834] [2020-10-11 13:18:10,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302592949] [2020-10-11 13:18:10,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:10,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-11 13:18:10,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:10,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-11 13:18:10,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:10,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:18:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:10,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:10,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-10-11 13:18:10,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800716535] [2020-10-11 13:18:10,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:18:10,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:10,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:18:10,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:18:10,238 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-10-11 13:18:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:11,949 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-10-11 13:18:11,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 13:18:11,950 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-10-11 13:18:11,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:11,950 INFO L225 Difference]: With dead ends: 124 [2020-10-11 13:18:11,950 INFO L226 Difference]: Without dead ends: 119 [2020-10-11 13:18:11,951 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-10-11 13:18:11,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-11 13:18:11,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-10-11 13:18:11,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-11 13:18:11,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-11 13:18:11,957 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-10-11 13:18:11,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:11,957 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-11 13:18:11,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:18:11,958 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-11 13:18:11,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:11,958 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:11,958 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:12,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-11 13:18:12,159 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:12,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:12,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-10-11 13:18:12,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:12,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427209593] [2020-10-11 13:18:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:12,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427209593] [2020-10-11 13:18:12,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258032035] [2020-10-11 13:18:12,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:12,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:18:12,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:12,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:12,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:12,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:18:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:12,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:12,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-11 13:18:12,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266692082] [2020-10-11 13:18:12,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:18:12,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:12,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:18:12,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:18:12,629 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 26 states. [2020-10-11 13:18:14,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:14,504 INFO L93 Difference]: Finished difference Result 102 states and 261 transitions. [2020-10-11 13:18:14,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 13:18:14,508 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-11 13:18:14,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:14,508 INFO L225 Difference]: With dead ends: 102 [2020-10-11 13:18:14,508 INFO L226 Difference]: Without dead ends: 97 [2020-10-11 13:18:14,509 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-10-11 13:18:14,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-11 13:18:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-10-11 13:18:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-11 13:18:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-10-11 13:18:14,510 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 29 [2020-10-11 13:18:14,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:14,511 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-10-11 13:18:14,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:18:14,511 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-10-11 13:18:14,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:14,511 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:14,511 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:14,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:14,712 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:14,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:14,712 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-10-11 13:18:14,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:14,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696632053] [2020-10-11 13:18:14,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:15,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696632053] [2020-10-11 13:18:15,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820595684] [2020-10-11 13:18:15,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:15,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-11 13:18:15,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:15,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:15,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:15,360 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:15,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:15,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-11 13:18:15,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107669656] [2020-10-11 13:18:15,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:18:15,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:15,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:18:15,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:18:15,361 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 25 states. [2020-10-11 13:18:16,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:16,153 INFO L93 Difference]: Finished difference Result 108 states and 251 transitions. [2020-10-11 13:18:16,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-11 13:18:16,154 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-11 13:18:16,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:16,155 INFO L225 Difference]: With dead ends: 108 [2020-10-11 13:18:16,155 INFO L226 Difference]: Without dead ends: 102 [2020-10-11 13:18:16,155 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2020-10-11 13:18:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-11 13:18:16,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-10-11 13:18:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-11 13:18:16,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-10-11 13:18:16,158 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 29 [2020-10-11 13:18:16,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:16,159 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-10-11 13:18:16,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:18:16,159 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-10-11 13:18:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:16,159 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:16,159 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:16,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:16,368 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:16,368 INFO L82 PathProgramCache]: Analyzing trace with hash -972903182, now seen corresponding path program 240 times [2020-10-11 13:18:16,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:16,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747461026] [2020-10-11 13:18:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:16,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747461026] [2020-10-11 13:18:16,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475718377] [2020-10-11 13:18:16,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:16,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-11 13:18:16,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:16,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:16,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:16,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:18:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:16,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:16,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-11 13:18:16,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114805785] [2020-10-11 13:18:16,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:18:16,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:16,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:18:16,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:18:16,959 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 26 states. [2020-10-11 13:18:17,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:17,817 INFO L93 Difference]: Finished difference Result 130 states and 295 transitions. [2020-10-11 13:18:17,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-11 13:18:17,819 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-11 13:18:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:17,819 INFO L225 Difference]: With dead ends: 130 [2020-10-11 13:18:17,819 INFO L226 Difference]: Without dead ends: 124 [2020-10-11 13:18:17,820 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=672, Invalid=1584, Unknown=0, NotChecked=0, Total=2256 [2020-10-11 13:18:17,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-11 13:18:17,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 76. [2020-10-11 13:18:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-11 13:18:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 187 transitions. [2020-10-11 13:18:17,822 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 187 transitions. Word has length 29 [2020-10-11 13:18:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:17,822 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 187 transitions. [2020-10-11 13:18:17,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:18:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 187 transitions. [2020-10-11 13:18:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:17,822 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:17,822 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:18,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:18,023 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:18,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:18,024 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 241 times [2020-10-11 13:18:18,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:18,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356142192] [2020-10-11 13:18:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:18,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356142192] [2020-10-11 13:18:18,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104328049] [2020-10-11 13:18:18,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:18,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:18,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:18,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:18,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-11 13:18:18,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236604333] [2020-10-11 13:18:18,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:18:18,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:18,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:18:18,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:18:18,578 INFO L87 Difference]: Start difference. First operand 76 states and 187 transitions. Second operand 25 states. [2020-10-11 13:18:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:19,477 INFO L93 Difference]: Finished difference Result 131 states and 299 transitions. [2020-10-11 13:18:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:18:19,478 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-11 13:18:19,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:19,479 INFO L225 Difference]: With dead ends: 131 [2020-10-11 13:18:19,479 INFO L226 Difference]: Without dead ends: 125 [2020-10-11 13:18:19,479 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=674, Invalid=1678, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:18:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-11 13:18:19,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 79. [2020-10-11 13:18:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-11 13:18:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-10-11 13:18:19,482 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 29 [2020-10-11 13:18:19,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:19,482 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-10-11 13:18:19,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:18:19,482 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-10-11 13:18:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:19,483 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:19,483 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:19,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:19,684 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:19,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:19,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2015097940, now seen corresponding path program 242 times [2020-10-11 13:18:19,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:19,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116404089] [2020-10-11 13:18:19,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:20,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116404089] [2020-10-11 13:18:20,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292669416] [2020-10-11 13:18:20,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:20,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:18:20,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:20,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:20,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:20,254 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:18:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:20,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:20,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-11 13:18:20,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461144388] [2020-10-11 13:18:20,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:18:20,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:20,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:18:20,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:18:20,269 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 26 states. [2020-10-11 13:18:21,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:21,219 INFO L93 Difference]: Finished difference Result 149 states and 335 transitions. [2020-10-11 13:18:21,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:18:21,220 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-11 13:18:21,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:21,221 INFO L225 Difference]: With dead ends: 149 [2020-10-11 13:18:21,221 INFO L226 Difference]: Without dead ends: 143 [2020-10-11 13:18:21,221 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=712, Invalid=1838, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:18:21,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-11 13:18:21,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 78. [2020-10-11 13:18:21,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-11 13:18:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 193 transitions. [2020-10-11 13:18:21,223 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 193 transitions. Word has length 29 [2020-10-11 13:18:21,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:21,224 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 193 transitions. [2020-10-11 13:18:21,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:18:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 193 transitions. [2020-10-11 13:18:21,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:21,224 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:21,224 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:21,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-11 13:18:21,425 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:21,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:21,426 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 243 times [2020-10-11 13:18:21,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:21,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015450821] [2020-10-11 13:18:21,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:21,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015450821] [2020-10-11 13:18:21,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805827123] [2020-10-11 13:18:21,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:21,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-11 13:18:21,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:21,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:21,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:21,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:21,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-11 13:18:21,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113545285] [2020-10-11 13:18:21,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:18:21,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:21,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:18:21,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:18:21,968 INFO L87 Difference]: Start difference. First operand 78 states and 193 transitions. Second operand 25 states. [2020-10-11 13:18:22,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:22,967 INFO L93 Difference]: Finished difference Result 149 states and 337 transitions. [2020-10-11 13:18:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:18:22,968 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-11 13:18:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:22,968 INFO L225 Difference]: With dead ends: 149 [2020-10-11 13:18:22,968 INFO L226 Difference]: Without dead ends: 143 [2020-10-11 13:18:22,969 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=728, Invalid=1924, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:18:22,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-11 13:18:22,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 81. [2020-10-11 13:18:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:18:22,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 201 transitions. [2020-10-11 13:18:22,971 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 201 transitions. Word has length 29 [2020-10-11 13:18:22,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:22,971 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 201 transitions. [2020-10-11 13:18:22,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:18:22,971 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 201 transitions. [2020-10-11 13:18:22,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:22,971 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:22,971 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:23,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-10-11 13:18:23,172 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:23,173 INFO L82 PathProgramCache]: Analyzing trace with hash -716985290, now seen corresponding path program 244 times [2020-10-11 13:18:23,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:23,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351697051] [2020-10-11 13:18:23,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:23,641 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:23,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351697051] [2020-10-11 13:18:23,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535769932] [2020-10-11 13:18:23,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:23,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:18:23,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:23,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:23,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:23,723 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:18:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:23,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:23,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-11 13:18:23,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188952436] [2020-10-11 13:18:23,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:18:23,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:23,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:18:23,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:18:23,742 INFO L87 Difference]: Start difference. First operand 81 states and 201 transitions. Second operand 26 states. [2020-10-11 13:18:24,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:24,787 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-10-11 13:18:24,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:18:24,788 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-11 13:18:24,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:24,788 INFO L225 Difference]: With dead ends: 146 [2020-10-11 13:18:24,788 INFO L226 Difference]: Without dead ends: 140 [2020-10-11 13:18:24,789 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=731, Invalid=2025, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 13:18:24,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-11 13:18:24,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 80. [2020-10-11 13:18:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:18:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 199 transitions. [2020-10-11 13:18:24,792 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 199 transitions. Word has length 29 [2020-10-11 13:18:24,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:24,792 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 199 transitions. [2020-10-11 13:18:24,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:18:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 199 transitions. [2020-10-11 13:18:24,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:24,793 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:24,793 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:24,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-11 13:18:24,999 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:25,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:25,000 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 245 times [2020-10-11 13:18:25,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:25,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162542355] [2020-10-11 13:18:25,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:25,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162542355] [2020-10-11 13:18:25,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555015756] [2020-10-11 13:18:25,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:25,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-11 13:18:25,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:25,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:25,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:25,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:25,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-11 13:18:25,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497785196] [2020-10-11 13:18:25,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:18:25,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:25,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:18:25,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:18:25,527 INFO L87 Difference]: Start difference. First operand 80 states and 199 transitions. Second operand 25 states. [2020-10-11 13:18:26,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:26,584 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-10-11 13:18:26,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:18:26,585 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-11 13:18:26,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:26,585 INFO L225 Difference]: With dead ends: 147 [2020-10-11 13:18:26,585 INFO L226 Difference]: Without dead ends: 141 [2020-10-11 13:18:26,585 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=762, Invalid=2100, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:18:26,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-11 13:18:26,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 83. [2020-10-11 13:18:26,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-11 13:18:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 207 transitions. [2020-10-11 13:18:26,587 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 207 transitions. Word has length 29 [2020-10-11 13:18:26,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:26,587 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 207 transitions. [2020-10-11 13:18:26,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:18:26,595 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 207 transitions. [2020-10-11 13:18:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:26,596 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:26,596 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:26,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-11 13:18:26,796 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:26,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:26,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1465644184, now seen corresponding path program 246 times [2020-10-11 13:18:26,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:26,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970058852] [2020-10-11 13:18:26,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:27,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970058852] [2020-10-11 13:18:27,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920134269] [2020-10-11 13:18:27,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:27,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-11 13:18:27,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:27,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:27,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:27,329 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:18:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:27,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:27,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-11 13:18:27,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683834475] [2020-10-11 13:18:27,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:18:27,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:27,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:18:27,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:18:27,348 INFO L87 Difference]: Start difference. First operand 83 states and 207 transitions. Second operand 26 states. [2020-10-11 13:18:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:28,559 INFO L93 Difference]: Finished difference Result 144 states and 329 transitions. [2020-10-11 13:18:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:18:28,560 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-11 13:18:28,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:28,560 INFO L225 Difference]: With dead ends: 144 [2020-10-11 13:18:28,560 INFO L226 Difference]: Without dead ends: 138 [2020-10-11 13:18:28,561 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=766, Invalid=2204, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:18:28,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-11 13:18:28,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2020-10-11 13:18:28,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 13:18:28,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 205 transitions. [2020-10-11 13:18:28,563 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 205 transitions. Word has length 29 [2020-10-11 13:18:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:28,563 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 205 transitions. [2020-10-11 13:18:28,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:18:28,563 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 205 transitions. [2020-10-11 13:18:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:28,564 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:28,564 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:28,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:28,764 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:28,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:28,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 247 times [2020-10-11 13:18:28,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:28,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123146709] [2020-10-11 13:18:28,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:29,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123146709] [2020-10-11 13:18:29,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36215952] [2020-10-11 13:18:29,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:29,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:29,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:29,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:29,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-11 13:18:29,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030043857] [2020-10-11 13:18:29,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:18:29,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:29,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:18:29,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:18:29,260 INFO L87 Difference]: Start difference. First operand 82 states and 205 transitions. Second operand 25 states. [2020-10-11 13:18:30,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:30,393 INFO L93 Difference]: Finished difference Result 145 states and 333 transitions. [2020-10-11 13:18:30,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:18:30,394 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-11 13:18:30,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:30,394 INFO L225 Difference]: With dead ends: 145 [2020-10-11 13:18:30,394 INFO L226 Difference]: Without dead ends: 139 [2020-10-11 13:18:30,395 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 13:18:30,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-11 13:18:30,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 85. [2020-10-11 13:18:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-11 13:18:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 213 transitions. [2020-10-11 13:18:30,397 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 213 transitions. Word has length 29 [2020-10-11 13:18:30,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:30,397 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 213 transitions. [2020-10-11 13:18:30,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:18:30,397 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 213 transitions. [2020-10-11 13:18:30,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:30,397 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:30,398 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:30,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-10-11 13:18:30,604 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:30,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:30,605 INFO L82 PathProgramCache]: Analyzing trace with hash -900797062, now seen corresponding path program 248 times [2020-10-11 13:18:30,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:30,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286088929] [2020-10-11 13:18:30,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:31,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286088929] [2020-10-11 13:18:31,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224573544] [2020-10-11 13:18:31,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:31,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:18:31,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:31,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:31,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:31,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:18:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:31,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:31,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-11 13:18:31,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789188722] [2020-10-11 13:18:31,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:18:31,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:31,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:18:31,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:18:31,148 INFO L87 Difference]: Start difference. First operand 85 states and 213 transitions. Second operand 26 states. [2020-10-11 13:18:32,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:32,471 INFO L93 Difference]: Finished difference Result 142 states and 327 transitions. [2020-10-11 13:18:32,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:18:32,472 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-11 13:18:32,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:32,472 INFO L225 Difference]: With dead ends: 142 [2020-10-11 13:18:32,472 INFO L226 Difference]: Without dead ends: 136 [2020-10-11 13:18:32,473 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=817, Invalid=2375, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:18:32,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-11 13:18:32,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-10-11 13:18:32,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-11 13:18:32,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2020-10-11 13:18:32,475 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 29 [2020-10-11 13:18:32,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:32,475 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2020-10-11 13:18:32,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:18:32,475 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2020-10-11 13:18:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:32,475 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:32,476 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:32,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:32,676 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:32,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:32,677 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 249 times [2020-10-11 13:18:32,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:32,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573710922] [2020-10-11 13:18:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:32,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:33,082 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:33,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573710922] [2020-10-11 13:18:33,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037021636] [2020-10-11 13:18:33,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:33,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-11 13:18:33,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:33,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:33,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:33,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:33,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-11 13:18:33,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027993125] [2020-10-11 13:18:33,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:18:33,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:33,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:18:33,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:18:33,172 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand 25 states. [2020-10-11 13:18:34,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:34,439 INFO L93 Difference]: Finished difference Result 143 states and 331 transitions. [2020-10-11 13:18:34,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:18:34,440 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-11 13:18:34,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:34,441 INFO L225 Difference]: With dead ends: 143 [2020-10-11 13:18:34,441 INFO L226 Difference]: Without dead ends: 137 [2020-10-11 13:18:34,441 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=878, Invalid=2428, Unknown=0, NotChecked=0, Total=3306 [2020-10-11 13:18:34,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-11 13:18:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 87. [2020-10-11 13:18:34,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:18:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 219 transitions. [2020-10-11 13:18:34,443 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 219 transitions. Word has length 29 [2020-10-11 13:18:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:34,443 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 219 transitions. [2020-10-11 13:18:34,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:18:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 219 transitions. [2020-10-11 13:18:34,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:34,444 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:34,444 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:34,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:34,644 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:34,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:34,645 INFO L82 PathProgramCache]: Analyzing trace with hash 772716252, now seen corresponding path program 250 times [2020-10-11 13:18:34,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:34,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275500269] [2020-10-11 13:18:34,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:35,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275500269] [2020-10-11 13:18:35,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014381896] [2020-10-11 13:18:35,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:35,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:18:35,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:35,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:35,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:35,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:18:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:35,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:35,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-11 13:18:35,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260285833] [2020-10-11 13:18:35,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:18:35,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:35,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:18:35,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:18:35,169 INFO L87 Difference]: Start difference. First operand 87 states and 219 transitions. Second operand 26 states. [2020-10-11 13:18:36,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:36,614 INFO L93 Difference]: Finished difference Result 140 states and 325 transitions. [2020-10-11 13:18:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:18:36,615 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-11 13:18:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:36,616 INFO L225 Difference]: With dead ends: 140 [2020-10-11 13:18:36,616 INFO L226 Difference]: Without dead ends: 134 [2020-10-11 13:18:36,616 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=884, Invalid=2538, Unknown=0, NotChecked=0, Total=3422 [2020-10-11 13:18:36,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-11 13:18:36,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2020-10-11 13:18:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:18:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 217 transitions. [2020-10-11 13:18:36,618 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 217 transitions. Word has length 29 [2020-10-11 13:18:36,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:36,619 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 217 transitions. [2020-10-11 13:18:36,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:18:36,619 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 217 transitions. [2020-10-11 13:18:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:36,619 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:36,620 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:36,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:36,820 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:36,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:36,821 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 251 times [2020-10-11 13:18:36,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:36,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207364764] [2020-10-11 13:18:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:37,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207364764] [2020-10-11 13:18:37,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024607665] [2020-10-11 13:18:37,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:37,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-11 13:18:37,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:37,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:37,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:37,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:37,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-11 13:18:37,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374924760] [2020-10-11 13:18:37,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:18:37,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:37,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:18:37,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:18:37,314 INFO L87 Difference]: Start difference. First operand 86 states and 217 transitions. Second operand 25 states. [2020-10-11 13:18:38,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:38,640 INFO L93 Difference]: Finished difference Result 141 states and 329 transitions. [2020-10-11 13:18:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:18:38,641 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-11 13:18:38,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:38,641 INFO L225 Difference]: With dead ends: 141 [2020-10-11 13:18:38,641 INFO L226 Difference]: Without dead ends: 135 [2020-10-11 13:18:38,642 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=960, Invalid=2580, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:18:38,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-11 13:18:38,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 89. [2020-10-11 13:18:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-11 13:18:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-10-11 13:18:38,644 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 29 [2020-10-11 13:18:38,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:38,645 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-10-11 13:18:38,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:18:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-10-11 13:18:38,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:38,645 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:38,646 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:38,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:38,855 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:38,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:38,855 INFO L82 PathProgramCache]: Analyzing trace with hash 412446910, now seen corresponding path program 252 times [2020-10-11 13:18:38,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:38,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908078623] [2020-10-11 13:18:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:38,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:39,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908078623] [2020-10-11 13:18:39,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429437062] [2020-10-11 13:18:39,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:39,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-11 13:18:39,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:39,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:39,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:39,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:18:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:39,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:39,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-11 13:18:39,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864939643] [2020-10-11 13:18:39,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:18:39,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:39,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:18:39,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:18:39,378 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 26 states. [2020-10-11 13:18:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:40,966 INFO L93 Difference]: Finished difference Result 138 states and 323 transitions. [2020-10-11 13:18:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:18:40,967 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-11 13:18:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:40,968 INFO L225 Difference]: With dead ends: 138 [2020-10-11 13:18:40,968 INFO L226 Difference]: Without dead ends: 132 [2020-10-11 13:18:40,969 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=967, Invalid=2693, Unknown=0, NotChecked=0, Total=3660 [2020-10-11 13:18:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-11 13:18:40,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 88. [2020-10-11 13:18:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 13:18:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-10-11 13:18:40,971 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 29 [2020-10-11 13:18:40,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:40,971 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-10-11 13:18:40,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:18:40,972 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-10-11 13:18:40,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:40,972 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:40,972 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:41,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:41,173 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:41,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:41,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 253 times [2020-10-11 13:18:41,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:41,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374899593] [2020-10-11 13:18:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:41,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374899593] [2020-10-11 13:18:41,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996648029] [2020-10-11 13:18:41,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:41,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:41,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:41,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:41,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-11 13:18:41,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879201309] [2020-10-11 13:18:41,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:18:41,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:41,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:18:41,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:18:41,659 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 25 states. [2020-10-11 13:18:43,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:43,096 INFO L93 Difference]: Finished difference Result 139 states and 327 transitions. [2020-10-11 13:18:43,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 13:18:43,098 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-11 13:18:43,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:43,098 INFO L225 Difference]: With dead ends: 139 [2020-10-11 13:18:43,098 INFO L226 Difference]: Without dead ends: 133 [2020-10-11 13:18:43,098 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1058, Invalid=2724, Unknown=0, NotChecked=0, Total=3782 [2020-10-11 13:18:43,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-11 13:18:43,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2020-10-11 13:18:43,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-11 13:18:43,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 231 transitions. [2020-10-11 13:18:43,101 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 231 transitions. Word has length 29 [2020-10-11 13:18:43,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:43,101 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 231 transitions. [2020-10-11 13:18:43,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:18:43,101 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 231 transitions. [2020-10-11 13:18:43,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:43,102 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:43,102 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:43,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-10-11 13:18:43,308 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:43,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:43,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1746584800, now seen corresponding path program 254 times [2020-10-11 13:18:43,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:43,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436416238] [2020-10-11 13:18:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:43,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436416238] [2020-10-11 13:18:43,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720285671] [2020-10-11 13:18:43,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:43,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:18:43,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:43,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:43,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:43,800 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:18:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:43,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:43,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-11 13:18:43,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270894813] [2020-10-11 13:18:43,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:18:43,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:43,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:18:43,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:18:43,824 INFO L87 Difference]: Start difference. First operand 91 states and 231 transitions. Second operand 26 states. [2020-10-11 13:18:45,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:45,574 INFO L93 Difference]: Finished difference Result 136 states and 321 transitions. [2020-10-11 13:18:45,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 13:18:45,576 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-11 13:18:45,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:45,577 INFO L225 Difference]: With dead ends: 136 [2020-10-11 13:18:45,577 INFO L226 Difference]: Without dead ends: 130 [2020-10-11 13:18:45,578 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1066, Invalid=2840, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 13:18:45,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-11 13:18:45,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2020-10-11 13:18:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-11 13:18:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-10-11 13:18:45,580 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 29 [2020-10-11 13:18:45,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:45,581 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-10-11 13:18:45,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:18:45,581 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-10-11 13:18:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:45,581 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:45,582 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:45,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-11 13:18:45,787 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:45,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:45,787 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 255 times [2020-10-11 13:18:45,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:45,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380448981] [2020-10-11 13:18:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:46,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380448981] [2020-10-11 13:18:46,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775996650] [2020-10-11 13:18:46,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:46,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-11 13:18:46,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:46,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:46,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:46,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:46,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-11 13:18:46,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827981704] [2020-10-11 13:18:46,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:18:46,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:46,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:18:46,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:18:46,269 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 25 states. [2020-10-11 13:18:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:47,780 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-10-11 13:18:47,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 13:18:47,781 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-11 13:18:47,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:47,781 INFO L225 Difference]: With dead ends: 137 [2020-10-11 13:18:47,781 INFO L226 Difference]: Without dead ends: 131 [2020-10-11 13:18:47,782 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1172, Invalid=2860, Unknown=0, NotChecked=0, Total=4032 [2020-10-11 13:18:47,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-11 13:18:47,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2020-10-11 13:18:47,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:18:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-10-11 13:18:47,784 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 29 [2020-10-11 13:18:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:47,784 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-10-11 13:18:47,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:18:47,784 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-10-11 13:18:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:47,785 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:47,785 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:47,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-11 13:18:47,986 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:47,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:47,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1811401214, now seen corresponding path program 256 times [2020-10-11 13:18:47,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:47,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69437435] [2020-10-11 13:18:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:48,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69437435] [2020-10-11 13:18:48,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886250367] [2020-10-11 13:18:48,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:48,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:18:48,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:48,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:48,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:48,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:18:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:48,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:48,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-11 13:18:48,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346806691] [2020-10-11 13:18:48,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:18:48,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:48,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:18:48,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:18:48,509 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 26 states. [2020-10-11 13:18:50,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:50,378 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-10-11 13:18:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-11 13:18:50,379 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-11 13:18:50,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:50,379 INFO L225 Difference]: With dead ends: 134 [2020-10-11 13:18:50,379 INFO L226 Difference]: Without dead ends: 128 [2020-10-11 13:18:50,379 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1181, Invalid=2979, Unknown=0, NotChecked=0, Total=4160 [2020-10-11 13:18:50,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-11 13:18:50,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 92. [2020-10-11 13:18:50,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:18:50,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-10-11 13:18:50,382 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 29 [2020-10-11 13:18:50,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:50,382 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-10-11 13:18:50,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:18:50,382 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-10-11 13:18:50,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:50,383 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:50,383 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:50,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:50,583 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:50,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:50,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 257 times [2020-10-11 13:18:50,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:50,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698424314] [2020-10-11 13:18:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:50,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698424314] [2020-10-11 13:18:50,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680799128] [2020-10-11 13:18:50,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:51,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-11 13:18:51,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:51,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:51,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:51,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:51,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-11 13:18:51,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054490591] [2020-10-11 13:18:51,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:18:51,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:51,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:18:51,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:18:51,073 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 25 states. [2020-10-11 13:18:52,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:52,693 INFO L93 Difference]: Finished difference Result 135 states and 323 transitions. [2020-10-11 13:18:52,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-11 13:18:52,694 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-11 13:18:52,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:52,694 INFO L225 Difference]: With dead ends: 135 [2020-10-11 13:18:52,694 INFO L226 Difference]: Without dead ends: 129 [2020-10-11 13:18:52,695 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1302, Invalid=2988, Unknown=0, NotChecked=0, Total=4290 [2020-10-11 13:18:52,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-11 13:18:52,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2020-10-11 13:18:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-11 13:18:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-10-11 13:18:52,697 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 29 [2020-10-11 13:18:52,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:52,698 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-10-11 13:18:52,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:18:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-10-11 13:18:52,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:52,698 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:52,698 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:52,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-11 13:18:52,899 INFO L429 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:52,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:52,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1324318364, now seen corresponding path program 258 times [2020-10-11 13:18:52,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:52,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200724069] [2020-10-11 13:18:52,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:53,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200724069] [2020-10-11 13:18:53,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471560153] [2020-10-11 13:18:53,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:53,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-11 13:18:53,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:53,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:53,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:53,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:18:53,425 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:53,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:53,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-11 13:18:53,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571434942] [2020-10-11 13:18:53,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:18:53,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:53,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:18:53,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:18:53,427 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-10-11 13:18:55,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:55,385 INFO L93 Difference]: Finished difference Result 132 states and 317 transitions. [2020-10-11 13:18:55,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-11 13:18:55,386 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-11 13:18:55,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:55,386 INFO L225 Difference]: With dead ends: 132 [2020-10-11 13:18:55,386 INFO L226 Difference]: Without dead ends: 126 [2020-10-11 13:18:55,387 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1312, Invalid=3110, Unknown=0, NotChecked=0, Total=4422 [2020-10-11 13:18:55,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-11 13:18:55,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2020-10-11 13:18:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-11 13:18:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-10-11 13:18:55,389 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 29 [2020-10-11 13:18:55,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:55,389 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-10-11 13:18:55,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:18:55,390 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-10-11 13:18:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:55,390 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:55,390 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:55,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:55,591 INFO L429 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:55,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:55,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 259 times [2020-10-11 13:18:55,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:55,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583647410] [2020-10-11 13:18:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:55,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583647410] [2020-10-11 13:18:55,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684496411] [2020-10-11 13:18:55,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:56,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:56,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:56,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:56,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-10-11 13:18:56,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705250972] [2020-10-11 13:18:56,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-11 13:18:56,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:56,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-11 13:18:56,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-10-11 13:18:56,077 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 25 states. [2020-10-11 13:18:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:18:57,785 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-10-11 13:18:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-11 13:18:57,786 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-10-11 13:18:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:18:57,787 INFO L225 Difference]: With dead ends: 152 [2020-10-11 13:18:57,787 INFO L226 Difference]: Without dead ends: 146 [2020-10-11 13:18:57,787 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1448, Invalid=3108, Unknown=0, NotChecked=0, Total=4556 [2020-10-11 13:18:57,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-11 13:18:57,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-10-11 13:18:57,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-11 13:18:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 261 transitions. [2020-10-11 13:18:57,790 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 261 transitions. Word has length 29 [2020-10-11 13:18:57,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:18:57,790 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 261 transitions. [2020-10-11 13:18:57,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-11 13:18:57,790 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 261 transitions. [2020-10-11 13:18:57,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-11 13:18:57,790 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:18:57,790 INFO L421 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:18:57,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2020-10-11 13:18:57,993 INFO L429 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:18:57,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:18:57,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1323811514, now seen corresponding path program 260 times [2020-10-11 13:18:57,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:18:57,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271954391] [2020-10-11 13:18:57,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:18:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:18:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:58,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271954391] [2020-10-11 13:18:58,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984146663] [2020-10-11 13:18:58,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:18:58,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:18:58,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:18:58,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-11 13:18:58,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:18:58,475 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:18:58,501 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:18:58,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:18:58,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-10-11 13:18:58,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838582734] [2020-10-11 13:18:58,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:18:58,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:18:58,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:18:58,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:18:58,503 INFO L87 Difference]: Start difference. First operand 100 states and 261 transitions. Second operand 26 states. [2020-10-11 13:19:00,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:00,550 INFO L93 Difference]: Finished difference Result 133 states and 323 transitions. [2020-10-11 13:19:00,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-11 13:19:00,551 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-10-11 13:19:00,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:00,552 INFO L225 Difference]: With dead ends: 133 [2020-10-11 13:19:00,552 INFO L226 Difference]: Without dead ends: 125 [2020-10-11 13:19:00,553 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1459, Invalid=3233, Unknown=0, NotChecked=0, Total=4692 [2020-10-11 13:19:00,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-11 13:19:00,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2020-10-11 13:19:00,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-11 13:19:00,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-10-11 13:19:00,555 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-10-11 13:19:00,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:00,555 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-10-11 13:19:00,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:19:00,555 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-10-11 13:19:00,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:00,556 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:00,556 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:00,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:00,764 INFO L429 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:00,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:00,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 261 times [2020-10-11 13:19:00,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:00,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178802749] [2020-10-11 13:19:00,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:01,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178802749] [2020-10-11 13:19:01,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285504926] [2020-10-11 13:19:01,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:01,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-11 13:19:01,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:01,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:01,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:01,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:01,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-11 13:19:01,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398375984] [2020-10-11 13:19:01,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:19:01,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:01,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:19:01,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:19:01,410 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-10-11 13:19:02,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:02,355 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-10-11 13:19:02,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:19:02,356 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-11 13:19:02,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:02,357 INFO L225 Difference]: With dead ends: 154 [2020-10-11 13:19:02,357 INFO L226 Difference]: Without dead ends: 148 [2020-10-11 13:19:02,357 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=717, Invalid=1635, Unknown=0, NotChecked=0, Total=2352 [2020-10-11 13:19:02,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-11 13:19:02,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 99. [2020-10-11 13:19:02,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 13:19:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-11 13:19:02,360 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-11 13:19:02,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:02,360 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-11 13:19:02,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:19:02,360 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-11 13:19:02,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:02,360 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:02,360 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:02,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:02,561 INFO L429 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:02,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:02,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2085740573, now seen corresponding path program 262 times [2020-10-11 13:19:02,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:02,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971175053] [2020-10-11 13:19:02,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:03,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971175053] [2020-10-11 13:19:03,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084075780] [2020-10-11 13:19:03,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:03,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:19:03,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:03,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:03,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:03,222 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:19:03,243 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:03,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:03,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-11 13:19:03,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539144693] [2020-10-11 13:19:03,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:19:03,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:03,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:19:03,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:19:03,244 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-11 13:19:04,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:04,338 INFO L93 Difference]: Finished difference Result 151 states and 357 transitions. [2020-10-11 13:19:04,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:19:04,340 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-11 13:19:04,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:04,340 INFO L225 Difference]: With dead ends: 151 [2020-10-11 13:19:04,340 INFO L226 Difference]: Without dead ends: 145 [2020-10-11 13:19:04,341 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=770, Invalid=1882, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:19:04,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-11 13:19:04,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 98. [2020-10-11 13:19:04,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 13:19:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-11 13:19:04,343 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-11 13:19:04,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:04,343 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-11 13:19:04,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:19:04,343 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-11 13:19:04,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:04,344 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:04,344 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:04,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:04,544 INFO L429 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:04,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:04,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 263 times [2020-10-11 13:19:04,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:04,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164342955] [2020-10-11 13:19:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:05,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164342955] [2020-10-11 13:19:05,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693570101] [2020-10-11 13:19:05,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:05,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-11 13:19:05,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:05,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:05,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:05,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:05,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-11 13:19:05,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134578095] [2020-10-11 13:19:05,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:19:05,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:05,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:19:05,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:19:05,172 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-11 13:19:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:06,244 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-11 13:19:06,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:19:06,245 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-11 13:19:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:06,246 INFO L225 Difference]: With dead ends: 148 [2020-10-11 13:19:06,246 INFO L226 Difference]: Without dead ends: 142 [2020-10-11 13:19:06,246 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=720, Invalid=1830, Unknown=0, NotChecked=0, Total=2550 [2020-10-11 13:19:06,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-11 13:19:06,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2020-10-11 13:19:06,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 13:19:06,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-11 13:19:06,248 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-11 13:19:06,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:06,248 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-11 13:19:06,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:19:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-11 13:19:06,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:06,249 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:06,249 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:06,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:06,449 INFO L429 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:06,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:06,450 INFO L82 PathProgramCache]: Analyzing trace with hash 778774399, now seen corresponding path program 264 times [2020-10-11 13:19:06,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:06,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184125731] [2020-10-11 13:19:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:07,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184125731] [2020-10-11 13:19:07,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523332719] [2020-10-11 13:19:07,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:07,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-11 13:19:07,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:07,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:07,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:07,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:19:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:07,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:07,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-11 13:19:07,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114749653] [2020-10-11 13:19:07,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:19:07,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:07,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:19:07,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:19:07,113 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-11 13:19:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:08,338 INFO L93 Difference]: Finished difference Result 147 states and 349 transitions. [2020-10-11 13:19:08,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:19:08,339 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-11 13:19:08,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:08,340 INFO L225 Difference]: With dead ends: 147 [2020-10-11 13:19:08,340 INFO L226 Difference]: Without dead ends: 141 [2020-10-11 13:19:08,340 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=780, Invalid=2082, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:19:08,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-11 13:19:08,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2020-10-11 13:19:08,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 13:19:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-11 13:19:08,343 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-11 13:19:08,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:08,343 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-11 13:19:08,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:19:08,343 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-11 13:19:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:08,343 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:08,343 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:08,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:08,544 INFO L429 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:08,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:08,544 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 265 times [2020-10-11 13:19:08,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:08,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198433275] [2020-10-11 13:19:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:09,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198433275] [2020-10-11 13:19:09,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890068107] [2020-10-11 13:19:09,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:09,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:09,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:09,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:09,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:09,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-11 13:19:09,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129293490] [2020-10-11 13:19:09,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:19:09,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:09,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:19:09,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:19:09,150 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-11 13:19:10,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:10,289 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-10-11 13:19:10,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:19:10,291 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-11 13:19:10,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:10,291 INFO L225 Difference]: With dead ends: 144 [2020-10-11 13:19:10,291 INFO L226 Difference]: Without dead ends: 138 [2020-10-11 13:19:10,292 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=739, Invalid=2017, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 13:19:10,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-11 13:19:10,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2020-10-11 13:19:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 13:19:10,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-11 13:19:10,294 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-11 13:19:10,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:10,295 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-11 13:19:10,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:19:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-11 13:19:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:10,295 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:10,295 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:10,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-10-11 13:19:10,496 INFO L429 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:10,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:10,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1953308831, now seen corresponding path program 266 times [2020-10-11 13:19:10,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:10,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929161721] [2020-10-11 13:19:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:11,022 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:11,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929161721] [2020-10-11 13:19:11,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915044876] [2020-10-11 13:19:11,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:11,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:19:11,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:11,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:11,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:11,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:19:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:11,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:11,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-11 13:19:11,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230406680] [2020-10-11 13:19:11,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:19:11,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:11,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:19:11,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:19:11,130 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-11 13:19:12,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:12,485 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-10-11 13:19:12,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:19:12,486 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-11 13:19:12,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:12,487 INFO L225 Difference]: With dead ends: 143 [2020-10-11 13:19:12,487 INFO L226 Difference]: Without dead ends: 137 [2020-10-11 13:19:12,488 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=806, Invalid=2274, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 13:19:12,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-11 13:19:12,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2020-10-11 13:19:12,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 13:19:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-11 13:19:12,490 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-11 13:19:12,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:12,490 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-11 13:19:12,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:19:12,490 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-11 13:19:12,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:12,491 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:12,491 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:12,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-10-11 13:19:12,692 INFO L429 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:12,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:12,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 267 times [2020-10-11 13:19:12,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:12,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348537632] [2020-10-11 13:19:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:13,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348537632] [2020-10-11 13:19:13,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303423459] [2020-10-11 13:19:13,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:13,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-11 13:19:13,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:13,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:13,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:13,275 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:13,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:13,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-11 13:19:13,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098300172] [2020-10-11 13:19:13,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:19:13,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:13,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:19:13,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:19:13,276 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-11 13:19:14,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:14,521 INFO L93 Difference]: Finished difference Result 140 states and 335 transitions. [2020-10-11 13:19:14,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:19:14,522 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-11 13:19:14,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:14,523 INFO L225 Difference]: With dead ends: 140 [2020-10-11 13:19:14,523 INFO L226 Difference]: Without dead ends: 134 [2020-10-11 13:19:14,523 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=774, Invalid=2196, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:19:14,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-11 13:19:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2020-10-11 13:19:14,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 13:19:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-11 13:19:14,525 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-11 13:19:14,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:14,526 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-11 13:19:14,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:19:14,526 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-11 13:19:14,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:14,526 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:14,526 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:14,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-10-11 13:19:14,727 INFO L429 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:14,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:14,727 INFO L82 PathProgramCache]: Analyzing trace with hash 229320643, now seen corresponding path program 268 times [2020-10-11 13:19:14,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:14,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478034600] [2020-10-11 13:19:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:15,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478034600] [2020-10-11 13:19:15,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704061686] [2020-10-11 13:19:15,242 INFO L93 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:15,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:19:15,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:15,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:15,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:15,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:19:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:15,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:15,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-11 13:19:15,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960898157] [2020-10-11 13:19:15,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:19:15,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:15,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:19:15,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:19:15,350 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-11 13:19:16,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:16,853 INFO L93 Difference]: Finished difference Result 139 states and 333 transitions. [2020-10-11 13:19:16,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:19:16,855 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-11 13:19:16,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:16,855 INFO L225 Difference]: With dead ends: 139 [2020-10-11 13:19:16,855 INFO L226 Difference]: Without dead ends: 133 [2020-10-11 13:19:16,856 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=848, Invalid=2458, Unknown=0, NotChecked=0, Total=3306 [2020-10-11 13:19:16,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-11 13:19:16,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2020-10-11 13:19:16,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 13:19:16,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-11 13:19:16,857 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-11 13:19:16,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:16,858 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-11 13:19:16,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:19:16,858 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-11 13:19:16,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:16,858 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:16,858 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:17,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-10-11 13:19:17,059 INFO L429 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:17,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:17,059 INFO L82 PathProgramCache]: Analyzing trace with hash 281597249, now seen corresponding path program 269 times [2020-10-11 13:19:17,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:17,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946704208] [2020-10-11 13:19:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:17,557 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:17,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946704208] [2020-10-11 13:19:17,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513440584] [2020-10-11 13:19:17,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:17,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-11 13:19:17,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:17,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:17,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:17,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:17,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-11 13:19:17,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416839565] [2020-10-11 13:19:17,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:19:17,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:17,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:19:17,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:19:17,642 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-11 13:19:18,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:18,998 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-11 13:19:18,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:19:19,000 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-11 13:19:19,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:19,000 INFO L225 Difference]: With dead ends: 136 [2020-10-11 13:19:19,000 INFO L226 Difference]: Without dead ends: 130 [2020-10-11 13:19:19,001 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=825, Invalid=2367, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:19:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-11 13:19:19,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2020-10-11 13:19:19,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 13:19:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-11 13:19:19,003 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-11 13:19:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:19,003 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-11 13:19:19,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:19:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-11 13:19:19,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:19,003 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:19,003 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:19,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:19,204 INFO L429 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:19,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:19,205 INFO L82 PathProgramCache]: Analyzing trace with hash -2137120603, now seen corresponding path program 270 times [2020-10-11 13:19:19,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:19,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810651810] [2020-10-11 13:19:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:19,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810651810] [2020-10-11 13:19:19,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631059805] [2020-10-11 13:19:19,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:19,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-11 13:19:19,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:19,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:19,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:19,782 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:19:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:19,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:19,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-11 13:19:19,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546626186] [2020-10-11 13:19:19,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:19:19,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:19,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:19:19,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:19:19,804 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-11 13:19:21,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:21,445 INFO L93 Difference]: Finished difference Result 135 states and 325 transitions. [2020-10-11 13:19:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:19:21,447 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-11 13:19:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:21,447 INFO L225 Difference]: With dead ends: 135 [2020-10-11 13:19:21,447 INFO L226 Difference]: Without dead ends: 129 [2020-10-11 13:19:21,448 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:19:21,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-11 13:19:21,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2020-10-11 13:19:21,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 13:19:21,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-11 13:19:21,450 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-11 13:19:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:21,450 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-11 13:19:21,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:19:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-11 13:19:21,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:21,451 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:21,451 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:21,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2020-10-11 13:19:21,651 INFO L429 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:21,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:21,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1448798813, now seen corresponding path program 271 times [2020-10-11 13:19:21,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:21,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103225594] [2020-10-11 13:19:21,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:22,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103225594] [2020-10-11 13:19:22,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091791642] [2020-10-11 13:19:22,131 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:22,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:22,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:22,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:22,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-11 13:19:22,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85181104] [2020-10-11 13:19:22,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:19:22,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:22,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:19:22,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:19:22,210 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-11 13:19:23,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:23,679 INFO L93 Difference]: Finished difference Result 132 states and 319 transitions. [2020-10-11 13:19:23,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:19:23,680 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-11 13:19:23,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:23,681 INFO L225 Difference]: With dead ends: 132 [2020-10-11 13:19:23,681 INFO L226 Difference]: Without dead ends: 126 [2020-10-11 13:19:23,681 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-10-11 13:19:23,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-11 13:19:23,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-10-11 13:19:23,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 13:19:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-11 13:19:23,683 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-11 13:19:23,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:23,684 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-11 13:19:23,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:19:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-11 13:19:23,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:23,684 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:23,684 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:23,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:23,885 INFO L429 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:23,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:23,886 INFO L82 PathProgramCache]: Analyzing trace with hash -463607289, now seen corresponding path program 272 times [2020-10-11 13:19:23,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:23,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342793144] [2020-10-11 13:19:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:24,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342793144] [2020-10-11 13:19:24,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105388971] [2020-10-11 13:19:24,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:24,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:19:24,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:24,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:24,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:24,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:19:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:24,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:24,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-11 13:19:24,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726663349] [2020-10-11 13:19:24,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:19:24,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:24,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:19:24,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:19:24,473 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-11 13:19:26,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:26,258 INFO L93 Difference]: Finished difference Result 131 states and 317 transitions. [2020-10-11 13:19:26,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:19:26,259 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-11 13:19:26,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:26,260 INFO L225 Difference]: With dead ends: 131 [2020-10-11 13:19:26,260 INFO L226 Difference]: Without dead ends: 125 [2020-10-11 13:19:26,261 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=980, Invalid=2802, Unknown=0, NotChecked=0, Total=3782 [2020-10-11 13:19:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-11 13:19:26,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2020-10-11 13:19:26,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 13:19:26,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-11 13:19:26,263 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-11 13:19:26,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:26,263 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-11 13:19:26,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:19:26,263 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-11 13:19:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:26,263 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:26,263 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:26,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:26,464 INFO L429 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:26,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:26,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2080766331, now seen corresponding path program 273 times [2020-10-11 13:19:26,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:26,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255665740] [2020-10-11 13:19:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:26,935 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:26,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255665740] [2020-10-11 13:19:26,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212059364] [2020-10-11 13:19:26,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:26,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-11 13:19:26,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:26,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:26,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:27,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:27,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-11 13:19:27,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922856100] [2020-10-11 13:19:27,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:19:27,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:27,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:19:27,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:19:27,024 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-11 13:19:28,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:28,581 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-10-11 13:19:28,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:19:28,583 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-11 13:19:28,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:28,583 INFO L225 Difference]: With dead ends: 128 [2020-10-11 13:19:28,583 INFO L226 Difference]: Without dead ends: 122 [2020-10-11 13:19:28,584 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=975, Invalid=2685, Unknown=0, NotChecked=0, Total=3660 [2020-10-11 13:19:28,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-11 13:19:28,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2020-10-11 13:19:28,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 13:19:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-11 13:19:28,585 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-11 13:19:28,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:28,586 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-11 13:19:28,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:19:28,586 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-11 13:19:28,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:28,586 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:28,586 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:28,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:28,789 INFO L429 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:28,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:28,789 INFO L82 PathProgramCache]: Analyzing trace with hash -823876631, now seen corresponding path program 274 times [2020-10-11 13:19:28,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:28,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908488767] [2020-10-11 13:19:28,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:29,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908488767] [2020-10-11 13:19:29,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380175875] [2020-10-11 13:19:29,269 INFO L93 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:29,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:19:29,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:29,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:29,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:29,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:19:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:29,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:29,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-11 13:19:29,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553558627] [2020-10-11 13:19:29,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:19:29,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:29,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:19:29,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:19:29,395 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-11 13:19:31,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:31,326 INFO L93 Difference]: Finished difference Result 127 states and 309 transitions. [2020-10-11 13:19:31,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 13:19:31,327 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-11 13:19:31,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:31,328 INFO L225 Difference]: With dead ends: 127 [2020-10-11 13:19:31,328 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 13:19:31,328 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1070, Invalid=2962, Unknown=0, NotChecked=0, Total=4032 [2020-10-11 13:19:31,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 13:19:31,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2020-10-11 13:19:31,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 13:19:31,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-11 13:19:31,331 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-11 13:19:31,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:31,331 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-11 13:19:31,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:19:31,331 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-11 13:19:31,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:31,331 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:31,331 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:31,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:31,532 INFO L429 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:31,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:31,533 INFO L82 PathProgramCache]: Analyzing trace with hash 792315879, now seen corresponding path program 275 times [2020-10-11 13:19:31,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:31,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499969390] [2020-10-11 13:19:31,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:31,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499969390] [2020-10-11 13:19:31,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614616558] [2020-10-11 13:19:31,992 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:32,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-11 13:19:32,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:32,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:32,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:32,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:32,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-11 13:19:32,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895526098] [2020-10-11 13:19:32,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:19:32,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:32,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:19:32,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:19:32,089 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-11 13:19:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:33,727 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-10-11 13:19:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 13:19:33,728 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-11 13:19:33,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:33,728 INFO L225 Difference]: With dead ends: 124 [2020-10-11 13:19:33,728 INFO L226 Difference]: Without dead ends: 118 [2020-10-11 13:19:33,729 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1074, Invalid=2832, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 13:19:33,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-11 13:19:33,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2020-10-11 13:19:33,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 13:19:33,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-11 13:19:33,731 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-11 13:19:33,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:33,731 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-11 13:19:33,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:19:33,731 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-11 13:19:33,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:33,732 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:33,732 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:33,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2020-10-11 13:19:33,933 INFO L429 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:33,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:33,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1312058955, now seen corresponding path program 276 times [2020-10-11 13:19:33,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:33,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085900067] [2020-10-11 13:19:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:34,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085900067] [2020-10-11 13:19:34,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629391135] [2020-10-11 13:19:34,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:34,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-11 13:19:34,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:34,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:34,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:34,503 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:19:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:34,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:34,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-11 13:19:34,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61322106] [2020-10-11 13:19:34,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:19:34,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:34,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:19:34,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:19:34,529 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-11 13:19:36,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:36,636 INFO L93 Difference]: Finished difference Result 123 states and 301 transitions. [2020-10-11 13:19:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-11 13:19:36,637 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-11 13:19:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:36,638 INFO L225 Difference]: With dead ends: 123 [2020-10-11 13:19:36,638 INFO L226 Difference]: Without dead ends: 117 [2020-10-11 13:19:36,638 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1176, Invalid=3114, Unknown=0, NotChecked=0, Total=4290 [2020-10-11 13:19:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-11 13:19:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-11 13:19:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 13:19:36,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-11 13:19:36,640 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-11 13:19:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:36,640 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-11 13:19:36,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:19:36,641 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-11 13:19:36,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:36,641 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:36,641 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:36,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-10-11 13:19:36,842 INFO L429 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:36,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:36,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1327597111, now seen corresponding path program 277 times [2020-10-11 13:19:36,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:36,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149795801] [2020-10-11 13:19:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:37,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149795801] [2020-10-11 13:19:37,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775621875] [2020-10-11 13:19:37,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:37,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:37,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:37,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:37,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-11 13:19:37,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335678874] [2020-10-11 13:19:37,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:19:37,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:37,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:19:37,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:19:37,399 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-11 13:19:39,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:39,157 INFO L93 Difference]: Finished difference Result 120 states and 295 transitions. [2020-10-11 13:19:39,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 13:19:39,158 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-11 13:19:39,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:39,159 INFO L225 Difference]: With dead ends: 120 [2020-10-11 13:19:39,159 INFO L226 Difference]: Without dead ends: 114 [2020-10-11 13:19:39,159 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1189, Invalid=2971, Unknown=0, NotChecked=0, Total=4160 [2020-10-11 13:19:39,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-11 13:19:39,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2020-10-11 13:19:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 13:19:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-11 13:19:39,161 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-11 13:19:39,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:39,161 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-11 13:19:39,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:19:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-11 13:19:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:39,162 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:39,162 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:39,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2020-10-11 13:19:39,363 INFO L429 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:39,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:39,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1247242541, now seen corresponding path program 278 times [2020-10-11 13:19:39,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:39,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85829098] [2020-10-11 13:19:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:39,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85829098] [2020-10-11 13:19:39,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146612578] [2020-10-11 13:19:39,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:39,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:19:39,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:39,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:39,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:39,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:19:39,943 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:39,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:39,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-11 13:19:39,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943080237] [2020-10-11 13:19:39,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:19:39,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:39,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:19:39,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:19:39,945 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-11 13:19:42,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:42,210 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-11 13:19:42,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-11 13:19:42,212 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-11 13:19:42,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:42,212 INFO L225 Difference]: With dead ends: 119 [2020-10-11 13:19:42,212 INFO L226 Difference]: Without dead ends: 113 [2020-10-11 13:19:42,213 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1298, Invalid=3258, Unknown=0, NotChecked=0, Total=4556 [2020-10-11 13:19:42,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-11 13:19:42,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2020-10-11 13:19:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 13:19:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-11 13:19:42,215 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-11 13:19:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:42,215 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-11 13:19:42,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:19:42,215 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-11 13:19:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:42,215 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:42,215 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:42,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-10-11 13:19:42,416 INFO L429 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1718238251, now seen corresponding path program 279 times [2020-10-11 13:19:42,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:42,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294360117] [2020-10-11 13:19:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:42,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294360117] [2020-10-11 13:19:42,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725663351] [2020-10-11 13:19:42,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:42,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-10-11 13:19:42,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:42,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:42,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:42,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:42,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-11 13:19:42,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575509445] [2020-10-11 13:19:42,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:19:42,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:42,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:19:42,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:19:42,984 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-11 13:19:44,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:44,862 INFO L93 Difference]: Finished difference Result 116 states and 287 transitions. [2020-10-11 13:19:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-11 13:19:44,864 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-11 13:19:44,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:44,864 INFO L225 Difference]: With dead ends: 116 [2020-10-11 13:19:44,864 INFO L226 Difference]: Without dead ends: 110 [2020-10-11 13:19:44,865 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1320, Invalid=3102, Unknown=0, NotChecked=0, Total=4422 [2020-10-11 13:19:44,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-11 13:19:44,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-10-11 13:19:44,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 13:19:44,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-11 13:19:44,867 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-10-11 13:19:44,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:44,867 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-11 13:19:44,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:19:44,867 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-11 13:19:44,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:44,868 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:44,868 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:45,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:45,068 INFO L429 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:45,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:45,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1734325391, now seen corresponding path program 280 times [2020-10-11 13:19:45,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:45,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820130460] [2020-10-11 13:19:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:45,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820130460] [2020-10-11 13:19:45,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792237293] [2020-10-11 13:19:45,535 INFO L93 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:45,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:19:45,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:45,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:45,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:45,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:19:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:45,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:45,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-11 13:19:45,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105303141] [2020-10-11 13:19:45,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:19:45,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:45,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:19:45,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:19:45,654 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-10-11 13:19:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:48,064 INFO L93 Difference]: Finished difference Result 115 states and 285 transitions. [2020-10-11 13:19:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-11 13:19:48,065 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-11 13:19:48,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:48,065 INFO L225 Difference]: With dead ends: 115 [2020-10-11 13:19:48,065 INFO L226 Difference]: Without dead ends: 109 [2020-10-11 13:19:48,066 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1436, Invalid=3394, Unknown=0, NotChecked=0, Total=4830 [2020-10-11 13:19:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-11 13:19:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-10-11 13:19:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 13:19:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-11 13:19:48,068 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-10-11 13:19:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:48,068 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-11 13:19:48,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:19:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-11 13:19:48,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:48,068 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:48,069 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:48,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2020-10-11 13:19:48,269 INFO L429 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:48,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:48,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1734815501, now seen corresponding path program 281 times [2020-10-11 13:19:48,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:48,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667766016] [2020-10-11 13:19:48,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:48,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667766016] [2020-10-11 13:19:48,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252352799] [2020-10-11 13:19:48,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:48,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-11 13:19:48,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:48,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:48,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:48,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:48,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-10-11 13:19:48,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821659090] [2020-10-11 13:19:48,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-11 13:19:48,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:48,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-11 13:19:48,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-10-11 13:19:48,833 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-10-11 13:19:50,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:50,850 INFO L93 Difference]: Finished difference Result 131 states and 325 transitions. [2020-10-11 13:19:50,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-11 13:19:50,852 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-10-11 13:19:50,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:50,852 INFO L225 Difference]: With dead ends: 131 [2020-10-11 13:19:50,853 INFO L226 Difference]: Without dead ends: 125 [2020-10-11 13:19:50,853 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1467, Invalid=3225, Unknown=0, NotChecked=0, Total=4692 [2020-10-11 13:19:50,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-11 13:19:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2020-10-11 13:19:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-11 13:19:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 265 transitions. [2020-10-11 13:19:50,855 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 265 transitions. Word has length 30 [2020-10-11 13:19:50,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:50,855 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 265 transitions. [2020-10-11 13:19:50,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-11 13:19:50,855 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 265 transitions. [2020-10-11 13:19:50,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:50,855 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:50,855 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:51,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:51,056 INFO L429 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:51,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:51,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1734832241, now seen corresponding path program 282 times [2020-10-11 13:19:51,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:51,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60587923] [2020-10-11 13:19:51,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:51,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60587923] [2020-10-11 13:19:51,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123088066] [2020-10-11 13:19:51,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:51,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-10-11 13:19:51,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:51,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:51,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:51,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:19:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:51,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:51,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-11 13:19:51,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183335320] [2020-10-11 13:19:51,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:19:51,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:51,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:19:51,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:19:51,667 INFO L87 Difference]: Start difference. First operand 102 states and 265 transitions. Second operand 27 states. [2020-10-11 13:19:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:54,215 INFO L93 Difference]: Finished difference Result 112 states and 281 transitions. [2020-10-11 13:19:54,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-11 13:19:54,216 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-11 13:19:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:54,217 INFO L225 Difference]: With dead ends: 112 [2020-10-11 13:19:54,217 INFO L226 Difference]: Without dead ends: 104 [2020-10-11 13:19:54,217 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1357 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1590, Invalid=3522, Unknown=0, NotChecked=0, Total=5112 [2020-10-11 13:19:54,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-11 13:19:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2020-10-11 13:19:54,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-11 13:19:54,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 178 transitions. [2020-10-11 13:19:54,219 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 178 transitions. Word has length 30 [2020-10-11 13:19:54,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:54,219 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 178 transitions. [2020-10-11 13:19:54,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:19:54,219 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 178 transitions. [2020-10-11 13:19:54,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-11 13:19:54,220 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:54,220 INFO L421 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:54,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:54,420 INFO L429 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:54,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:54,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1911532333, now seen corresponding path program 283 times [2020-10-11 13:19:54,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:54,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040900106] [2020-10-11 13:19:54,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:54,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040900106] [2020-10-11 13:19:54,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383112191] [2020-10-11 13:19:54,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:54,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-11 13:19:54,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:54,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:19:55,023 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:55,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:55,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-10-11 13:19:55,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383304204] [2020-10-11 13:19:55,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:19:55,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:55,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:19:55,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:19:55,025 INFO L87 Difference]: Start difference. First operand 73 states and 178 transitions. Second operand 27 states. [2020-10-11 13:19:57,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:19:57,385 INFO L93 Difference]: Finished difference Result 132 states and 323 transitions. [2020-10-11 13:19:57,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-11 13:19:57,386 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-10-11 13:19:57,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:19:57,386 INFO L225 Difference]: With dead ends: 132 [2020-10-11 13:19:57,386 INFO L226 Difference]: Without dead ends: 127 [2020-10-11 13:19:57,387 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1649, Invalid=3463, Unknown=0, NotChecked=0, Total=5112 [2020-10-11 13:19:57,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-11 13:19:57,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2020-10-11 13:19:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-11 13:19:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-10-11 13:19:57,388 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 30 [2020-10-11 13:19:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:19:57,388 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-10-11 13:19:57,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:19:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-10-11 13:19:57,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:19:57,389 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:19:57,389 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:19:57,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:57,590 INFO L429 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:19:57,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:19:57,590 INFO L82 PathProgramCache]: Analyzing trace with hash -2054759070, now seen corresponding path program 284 times [2020-10-11 13:19:57,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:19:57,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327496827] [2020-10-11 13:19:57,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:19:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:19:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:58,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327496827] [2020-10-11 13:19:58,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023335069] [2020-10-11 13:19:58,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:19:58,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:19:58,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:19:58,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:19:58,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:19:58,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:19:58,231 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:19:58,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:19:58,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-11 13:19:58,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535358256] [2020-10-11 13:19:58,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:19:58,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:19:58,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:19:58,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:19:58,232 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 28 states. [2020-10-11 13:20:00,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:00,748 INFO L93 Difference]: Finished difference Result 108 states and 277 transitions. [2020-10-11 13:20:00,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-11 13:20:00,750 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-11 13:20:00,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:00,750 INFO L225 Difference]: With dead ends: 108 [2020-10-11 13:20:00,750 INFO L226 Difference]: Without dead ends: 103 [2020-10-11 13:20:00,751 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1669, Invalid=3587, Unknown=0, NotChecked=0, Total=5256 [2020-10-11 13:20:00,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-11 13:20:00,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2020-10-11 13:20:00,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-11 13:20:00,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-10-11 13:20:00,752 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 31 [2020-10-11 13:20:00,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:00,752 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-10-11 13:20:00,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:20:00,753 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-10-11 13:20:00,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:00,753 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:00,753 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:00,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:00,954 INFO L429 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:00,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:00,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1128130483, now seen corresponding path program 285 times [2020-10-11 13:20:00,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:00,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688354073] [2020-10-11 13:20:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:01,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688354073] [2020-10-11 13:20:01,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605845492] [2020-10-11 13:20:01,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:01,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-11 13:20:01,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:01,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:01,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:01,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:01,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-11 13:20:01,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932789077] [2020-10-11 13:20:01,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:20:01,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:01,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:20:01,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:20:01,698 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 27 states. [2020-10-11 13:20:02,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:02,749 INFO L93 Difference]: Finished difference Result 114 states and 265 transitions. [2020-10-11 13:20:02,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-11 13:20:02,750 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-11 13:20:02,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:02,751 INFO L225 Difference]: With dead ends: 114 [2020-10-11 13:20:02,751 INFO L226 Difference]: Without dead ends: 108 [2020-10-11 13:20:02,751 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=783, Invalid=1667, Unknown=0, NotChecked=0, Total=2450 [2020-10-11 13:20:02,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-11 13:20:02,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-10-11 13:20:02,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 13:20:02,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 201 transitions. [2020-10-11 13:20:02,753 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 201 transitions. Word has length 31 [2020-10-11 13:20:02,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:02,753 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 201 transitions. [2020-10-11 13:20:02,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:20:02,754 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 201 transitions. [2020-10-11 13:20:02,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:02,754 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:02,754 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:02,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:02,955 INFO L429 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:02,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:02,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1342928561, now seen corresponding path program 286 times [2020-10-11 13:20:02,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:02,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361805259] [2020-10-11 13:20:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:03,618 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:03,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361805259] [2020-10-11 13:20:03,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939865253] [2020-10-11 13:20:03,619 INFO L93 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:03,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:20:03,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:03,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:03,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:03,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:20:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:03,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:03,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-11 13:20:03,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906053506] [2020-10-11 13:20:03,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:20:03,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:03,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:20:03,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:20:03,728 INFO L87 Difference]: Start difference. First operand 82 states and 201 transitions. Second operand 28 states. [2020-10-11 13:20:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:04,912 INFO L93 Difference]: Finished difference Result 138 states and 313 transitions. [2020-10-11 13:20:04,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-11 13:20:04,913 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-11 13:20:04,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:04,914 INFO L225 Difference]: With dead ends: 138 [2020-10-11 13:20:04,914 INFO L226 Difference]: Without dead ends: 132 [2020-10-11 13:20:04,914 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=792, Invalid=1860, Unknown=0, NotChecked=0, Total=2652 [2020-10-11 13:20:04,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-11 13:20:04,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-10-11 13:20:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-11 13:20:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 197 transitions. [2020-10-11 13:20:04,917 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 197 transitions. Word has length 31 [2020-10-11 13:20:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:04,917 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 197 transitions. [2020-10-11 13:20:04,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:20:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 197 transitions. [2020-10-11 13:20:04,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:04,917 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:04,917 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:05,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-10-11 13:20:05,118 INFO L429 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:05,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:05,119 INFO L82 PathProgramCache]: Analyzing trace with hash 517654063, now seen corresponding path program 287 times [2020-10-11 13:20:05,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:05,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928217901] [2020-10-11 13:20:05,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:05,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:05,775 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:05,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928217901] [2020-10-11 13:20:05,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644477982] [2020-10-11 13:20:05,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:05,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-11 13:20:05,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:05,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:05,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:05,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:05,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-11 13:20:05,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602503526] [2020-10-11 13:20:05,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:20:05,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:05,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:20:05,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:20:05,857 INFO L87 Difference]: Start difference. First operand 80 states and 197 transitions. Second operand 27 states. [2020-10-11 13:20:07,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:07,045 INFO L93 Difference]: Finished difference Result 139 states and 317 transitions. [2020-10-11 13:20:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:20:07,046 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-11 13:20:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:07,047 INFO L225 Difference]: With dead ends: 139 [2020-10-11 13:20:07,047 INFO L226 Difference]: Without dead ends: 133 [2020-10-11 13:20:07,047 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=793, Invalid=1963, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 13:20:07,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-11 13:20:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 83. [2020-10-11 13:20:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-11 13:20:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 205 transitions. [2020-10-11 13:20:07,049 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 205 transitions. Word has length 31 [2020-10-11 13:20:07,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:07,050 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 205 transitions. [2020-10-11 13:20:07,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:20:07,050 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 205 transitions. [2020-10-11 13:20:07,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:07,050 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:07,050 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:07,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-10-11 13:20:07,251 INFO L429 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:07,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:07,251 INFO L82 PathProgramCache]: Analyzing trace with hash -521114221, now seen corresponding path program 288 times [2020-10-11 13:20:07,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:07,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570667521] [2020-10-11 13:20:07,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:07,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570667521] [2020-10-11 13:20:07,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841047589] [2020-10-11 13:20:07,922 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:07,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-11 13:20:07,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:07,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:07,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:08,021 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:20:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:08,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:08,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-11 13:20:08,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021107618] [2020-10-11 13:20:08,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:20:08,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:08,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:20:08,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:20:08,039 INFO L87 Difference]: Start difference. First operand 83 states and 205 transitions. Second operand 28 states. [2020-10-11 13:20:09,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:09,382 INFO L93 Difference]: Finished difference Result 159 states and 357 transitions. [2020-10-11 13:20:09,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:20:09,383 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-11 13:20:09,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:09,384 INFO L225 Difference]: With dead ends: 159 [2020-10-11 13:20:09,384 INFO L226 Difference]: Without dead ends: 153 [2020-10-11 13:20:09,385 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=833, Invalid=2137, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:20:09,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-11 13:20:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 82. [2020-10-11 13:20:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 13:20:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 203 transitions. [2020-10-11 13:20:09,387 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 203 transitions. Word has length 31 [2020-10-11 13:20:09,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:09,387 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 203 transitions. [2020-10-11 13:20:09,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:20:09,387 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 203 transitions. [2020-10-11 13:20:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:09,388 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:09,388 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:09,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-10-11 13:20:09,589 INFO L429 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:09,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:09,589 INFO L82 PathProgramCache]: Analyzing trace with hash -106330991, now seen corresponding path program 289 times [2020-10-11 13:20:09,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:09,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204020381] [2020-10-11 13:20:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:10,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204020381] [2020-10-11 13:20:10,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489875124] [2020-10-11 13:20:10,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:10,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:10,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:10,289 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:10,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:10,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-11 13:20:10,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504669016] [2020-10-11 13:20:10,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:20:10,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:10,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:20:10,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:20:10,290 INFO L87 Difference]: Start difference. First operand 82 states and 203 transitions. Second operand 27 states. [2020-10-11 13:20:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:11,621 INFO L93 Difference]: Finished difference Result 159 states and 359 transitions. [2020-10-11 13:20:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:20:11,623 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-11 13:20:11,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:11,624 INFO L225 Difference]: With dead ends: 159 [2020-10-11 13:20:11,624 INFO L226 Difference]: Without dead ends: 153 [2020-10-11 13:20:11,624 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=848, Invalid=2232, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 13:20:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-11 13:20:11,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 85. [2020-10-11 13:20:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-11 13:20:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 211 transitions. [2020-10-11 13:20:11,626 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 211 transitions. Word has length 31 [2020-10-11 13:20:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:11,626 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 211 transitions. [2020-10-11 13:20:11,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:20:11,627 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 211 transitions. [2020-10-11 13:20:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:11,627 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:11,627 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:11,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:11,828 INFO L429 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:11,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:11,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1828080395, now seen corresponding path program 290 times [2020-10-11 13:20:11,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:11,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065216684] [2020-10-11 13:20:11,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:12,461 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:12,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065216684] [2020-10-11 13:20:12,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476725773] [2020-10-11 13:20:12,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:12,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:20:12,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:12,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:12,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:12,556 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:20:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:12,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:12,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-11 13:20:12,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045909949] [2020-10-11 13:20:12,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:20:12,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:12,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:20:12,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:20:12,575 INFO L87 Difference]: Start difference. First operand 85 states and 211 transitions. Second operand 28 states. [2020-10-11 13:20:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:14,003 INFO L93 Difference]: Finished difference Result 156 states and 353 transitions. [2020-10-11 13:20:14,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:20:14,005 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-11 13:20:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:14,005 INFO L225 Difference]: With dead ends: 156 [2020-10-11 13:20:14,005 INFO L226 Difference]: Without dead ends: 150 [2020-10-11 13:20:14,006 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=850, Invalid=2342, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:20:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-11 13:20:14,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 84. [2020-10-11 13:20:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-11 13:20:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 209 transitions. [2020-10-11 13:20:14,007 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 209 transitions. Word has length 31 [2020-10-11 13:20:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:14,007 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 209 transitions. [2020-10-11 13:20:14,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:20:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 209 transitions. [2020-10-11 13:20:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:14,008 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:14,008 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:14,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:14,208 INFO L429 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:14,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:14,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1282962291, now seen corresponding path program 291 times [2020-10-11 13:20:14,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:14,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614481139] [2020-10-11 13:20:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:14,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614481139] [2020-10-11 13:20:14,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819752119] [2020-10-11 13:20:14,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:14,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-11 13:20:14,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:14,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:14,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:14,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:14,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-11 13:20:14,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593483727] [2020-10-11 13:20:14,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:20:14,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:14,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:20:14,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:20:14,902 INFO L87 Difference]: Start difference. First operand 84 states and 209 transitions. Second operand 27 states. [2020-10-11 13:20:16,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:16,341 INFO L93 Difference]: Finished difference Result 157 states and 357 transitions. [2020-10-11 13:20:16,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:20:16,342 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-11 13:20:16,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:16,343 INFO L225 Difference]: With dead ends: 157 [2020-10-11 13:20:16,343 INFO L226 Difference]: Without dead ends: 151 [2020-10-11 13:20:16,343 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=880, Invalid=2426, Unknown=0, NotChecked=0, Total=3306 [2020-10-11 13:20:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-11 13:20:16,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2020-10-11 13:20:16,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:20:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 217 transitions. [2020-10-11 13:20:16,346 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 217 transitions. Word has length 31 [2020-10-11 13:20:16,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:16,346 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 217 transitions. [2020-10-11 13:20:16,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:20:16,346 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 217 transitions. [2020-10-11 13:20:16,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:16,346 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:16,346 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:16,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:16,547 INFO L429 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:16,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:16,548 INFO L82 PathProgramCache]: Analyzing trace with hash -265196329, now seen corresponding path program 292 times [2020-10-11 13:20:16,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:16,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707587854] [2020-10-11 13:20:16,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:17,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707587854] [2020-10-11 13:20:17,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130438684] [2020-10-11 13:20:17,165 INFO L93 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:17,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:20:17,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:17,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:17,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:17,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:20:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:17,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:17,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-11 13:20:17,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172732631] [2020-10-11 13:20:17,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:20:17,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:17,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:20:17,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:20:17,280 INFO L87 Difference]: Start difference. First operand 87 states and 217 transitions. Second operand 28 states. [2020-10-11 13:20:18,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:18,867 INFO L93 Difference]: Finished difference Result 154 states and 351 transitions. [2020-10-11 13:20:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:20:18,869 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-11 13:20:18,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:18,869 INFO L225 Difference]: With dead ends: 154 [2020-10-11 13:20:18,869 INFO L226 Difference]: Without dead ends: 148 [2020-10-11 13:20:18,870 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=883, Invalid=2539, Unknown=0, NotChecked=0, Total=3422 [2020-10-11 13:20:18,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-11 13:20:18,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 86. [2020-10-11 13:20:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:20:18,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 215 transitions. [2020-10-11 13:20:18,872 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 215 transitions. Word has length 31 [2020-10-11 13:20:18,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:18,872 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 215 transitions. [2020-10-11 13:20:18,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:20:18,872 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 215 transitions. [2020-10-11 13:20:18,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:18,872 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:18,872 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:19,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2020-10-11 13:20:19,073 INFO L429 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:19,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:19,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1566985515, now seen corresponding path program 293 times [2020-10-11 13:20:19,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:19,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136876980] [2020-10-11 13:20:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:19,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:19,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136876980] [2020-10-11 13:20:19,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774219853] [2020-10-11 13:20:19,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:19,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-11 13:20:19,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:19,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:19,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:19,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:19,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-11 13:20:19,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468574873] [2020-10-11 13:20:19,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:20:19,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:19,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:20:19,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:20:19,741 INFO L87 Difference]: Start difference. First operand 86 states and 215 transitions. Second operand 27 states. [2020-10-11 13:20:21,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:21,296 INFO L93 Difference]: Finished difference Result 155 states and 355 transitions. [2020-10-11 13:20:21,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:20:21,297 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-11 13:20:21,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:21,298 INFO L225 Difference]: With dead ends: 155 [2020-10-11 13:20:21,298 INFO L226 Difference]: Without dead ends: 149 [2020-10-11 13:20:21,299 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=928, Invalid=2612, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:20:21,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-11 13:20:21,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 89. [2020-10-11 13:20:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-11 13:20:21,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2020-10-11 13:20:21,301 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 31 [2020-10-11 13:20:21,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:21,301 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2020-10-11 13:20:21,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:20:21,302 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2020-10-11 13:20:21,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:21,302 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:21,302 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:21,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:21,510 INFO L429 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:21,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:21,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1917433145, now seen corresponding path program 294 times [2020-10-11 13:20:21,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:21,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887577066] [2020-10-11 13:20:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:22,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887577066] [2020-10-11 13:20:22,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677101661] [2020-10-11 13:20:22,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:22,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-11 13:20:22,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:22,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:22,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:22,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:20:22,241 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:22,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:22,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-11 13:20:22,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083459479] [2020-10-11 13:20:22,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:20:22,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:22,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:20:22,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:20:22,242 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand 28 states. [2020-10-11 13:20:24,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:24,017 INFO L93 Difference]: Finished difference Result 152 states and 349 transitions. [2020-10-11 13:20:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:20:24,019 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-11 13:20:24,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:24,019 INFO L225 Difference]: With dead ends: 152 [2020-10-11 13:20:24,019 INFO L226 Difference]: Without dead ends: 146 [2020-10-11 13:20:24,020 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=932, Invalid=2728, Unknown=0, NotChecked=0, Total=3660 [2020-10-11 13:20:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-11 13:20:24,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 88. [2020-10-11 13:20:24,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 13:20:24,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 221 transitions. [2020-10-11 13:20:24,022 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 221 transitions. Word has length 31 [2020-10-11 13:20:24,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:24,022 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 221 transitions. [2020-10-11 13:20:24,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:20:24,022 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 221 transitions. [2020-10-11 13:20:24,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:24,022 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:24,022 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:24,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:24,223 INFO L429 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:24,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:24,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1969709751, now seen corresponding path program 295 times [2020-10-11 13:20:24,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:24,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467395033] [2020-10-11 13:20:24,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:24,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:24,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467395033] [2020-10-11 13:20:24,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063501186] [2020-10-11 13:20:24,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:24,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:24,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:24,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:24,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-11 13:20:24,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776011697] [2020-10-11 13:20:24,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:20:24,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:24,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:20:24,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:20:24,890 INFO L87 Difference]: Start difference. First operand 88 states and 221 transitions. Second operand 27 states. [2020-10-11 13:20:26,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:26,552 INFO L93 Difference]: Finished difference Result 153 states and 353 transitions. [2020-10-11 13:20:26,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:20:26,554 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-11 13:20:26,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:26,554 INFO L225 Difference]: With dead ends: 153 [2020-10-11 13:20:26,554 INFO L226 Difference]: Without dead ends: 147 [2020-10-11 13:20:26,554 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2020-10-11 13:20:26,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-11 13:20:26,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 91. [2020-10-11 13:20:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-11 13:20:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 229 transitions. [2020-10-11 13:20:26,557 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 229 transitions. Word has length 31 [2020-10-11 13:20:26,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:26,557 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 229 transitions. [2020-10-11 13:20:26,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:20:26,557 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 229 transitions. [2020-10-11 13:20:26,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:26,557 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:26,558 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:26,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:26,758 INFO L429 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:26,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:26,759 INFO L82 PathProgramCache]: Analyzing trace with hash -449008101, now seen corresponding path program 296 times [2020-10-11 13:20:26,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:26,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682677804] [2020-10-11 13:20:26,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:27,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682677804] [2020-10-11 13:20:27,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864669927] [2020-10-11 13:20:27,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:27,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:20:27,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:27,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:27,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:27,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:20:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:27,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:27,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-11 13:20:27,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613802530] [2020-10-11 13:20:27,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:20:27,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:27,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:20:27,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:20:27,464 INFO L87 Difference]: Start difference. First operand 91 states and 229 transitions. Second operand 28 states. [2020-10-11 13:20:29,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:29,351 INFO L93 Difference]: Finished difference Result 150 states and 347 transitions. [2020-10-11 13:20:29,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:20:29,352 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-11 13:20:29,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:29,353 INFO L225 Difference]: With dead ends: 150 [2020-10-11 13:20:29,353 INFO L226 Difference]: Without dead ends: 144 [2020-10-11 13:20:29,353 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 13:20:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-11 13:20:29,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-10-11 13:20:29,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-11 13:20:29,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 227 transitions. [2020-10-11 13:20:29,356 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 227 transitions. Word has length 31 [2020-10-11 13:20:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:29,356 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 227 transitions. [2020-10-11 13:20:29,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:20:29,356 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 227 transitions. [2020-10-11 13:20:29,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:29,357 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:29,357 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:29,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:29,560 INFO L429 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:29,560 INFO L82 PathProgramCache]: Analyzing trace with hash 239313689, now seen corresponding path program 297 times [2020-10-11 13:20:29,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:29,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122352550] [2020-10-11 13:20:29,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:30,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122352550] [2020-10-11 13:20:30,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418899393] [2020-10-11 13:20:30,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:30,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-11 13:20:30,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:30,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:30,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:30,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:30,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-11 13:20:30,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128668915] [2020-10-11 13:20:30,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:20:30,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:30,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:20:30,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:20:30,228 INFO L87 Difference]: Start difference. First operand 90 states and 227 transitions. Second operand 27 states. [2020-10-11 13:20:32,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:32,018 INFO L93 Difference]: Finished difference Result 151 states and 351 transitions. [2020-10-11 13:20:32,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 13:20:32,019 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-11 13:20:32,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:32,019 INFO L225 Difference]: With dead ends: 151 [2020-10-11 13:20:32,019 INFO L226 Difference]: Without dead ends: 145 [2020-10-11 13:20:32,020 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2020-10-11 13:20:32,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-11 13:20:32,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2020-10-11 13:20:32,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:20:32,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 235 transitions. [2020-10-11 13:20:32,022 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 235 transitions. Word has length 31 [2020-10-11 13:20:32,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:32,022 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 235 transitions. [2020-10-11 13:20:32,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:20:32,022 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 235 transitions. [2020-10-11 13:20:32,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:32,023 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:32,023 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:32,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:32,224 INFO L429 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:32,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:32,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1224505213, now seen corresponding path program 298 times [2020-10-11 13:20:32,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:32,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598486390] [2020-10-11 13:20:32,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:32,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598486390] [2020-10-11 13:20:32,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573341796] [2020-10-11 13:20:32,803 INFO L93 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:32,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:20:32,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:32,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:32,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:32,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:20:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:32,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:32,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-11 13:20:32,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542875527] [2020-10-11 13:20:32,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:20:32,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:32,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:20:32,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:20:32,924 INFO L87 Difference]: Start difference. First operand 93 states and 235 transitions. Second operand 28 states. [2020-10-11 13:20:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:34,990 INFO L93 Difference]: Finished difference Result 148 states and 345 transitions. [2020-10-11 13:20:34,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 13:20:34,992 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-11 13:20:34,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:34,992 INFO L225 Difference]: With dead ends: 148 [2020-10-11 13:20:34,993 INFO L226 Difference]: Without dead ends: 142 [2020-10-11 13:20:34,993 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1078, Invalid=3082, Unknown=0, NotChecked=0, Total=4160 [2020-10-11 13:20:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-11 13:20:34,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 92. [2020-10-11 13:20:34,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:20:34,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 233 transitions. [2020-10-11 13:20:34,996 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 233 transitions. Word has length 31 [2020-10-11 13:20:34,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:34,996 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 233 transitions. [2020-10-11 13:20:34,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:20:34,996 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 233 transitions. [2020-10-11 13:20:34,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:34,997 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:34,997 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:35,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-10-11 13:20:35,206 INFO L429 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:35,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:35,207 INFO L82 PathProgramCache]: Analyzing trace with hash -392653829, now seen corresponding path program 299 times [2020-10-11 13:20:35,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:35,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856387312] [2020-10-11 13:20:35,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:35,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856387312] [2020-10-11 13:20:35,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756113574] [2020-10-11 13:20:35,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:35,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-11 13:20:35,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:35,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:35,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:35,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:35,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-11 13:20:35,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673626130] [2020-10-11 13:20:35,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:20:35,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:35,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:20:35,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:20:35,854 INFO L87 Difference]: Start difference. First operand 92 states and 233 transitions. Second operand 27 states. [2020-10-11 13:20:37,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:37,753 INFO L93 Difference]: Finished difference Result 149 states and 349 transitions. [2020-10-11 13:20:37,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 13:20:37,755 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-11 13:20:37,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:37,755 INFO L225 Difference]: With dead ends: 149 [2020-10-11 13:20:37,755 INFO L226 Difference]: Without dead ends: 143 [2020-10-11 13:20:37,756 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1168, Invalid=3122, Unknown=0, NotChecked=0, Total=4290 [2020-10-11 13:20:37,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-11 13:20:37,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 95. [2020-10-11 13:20:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-11 13:20:37,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-10-11 13:20:37,758 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 31 [2020-10-11 13:20:37,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:37,759 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-10-11 13:20:37,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:20:37,759 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-10-11 13:20:37,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:37,759 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:37,759 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:37,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-10-11 13:20:37,960 INFO L429 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:37,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:37,961 INFO L82 PathProgramCache]: Analyzing trace with hash 864235871, now seen corresponding path program 300 times [2020-10-11 13:20:37,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:37,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860874052] [2020-10-11 13:20:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:38,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860874052] [2020-10-11 13:20:38,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446728329] [2020-10-11 13:20:38,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:38,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-11 13:20:38,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:38,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:38,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:38,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:20:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:38,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:38,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-11 13:20:38,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237732993] [2020-10-11 13:20:38,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:20:38,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:38,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:20:38,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:20:38,659 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 28 states. [2020-10-11 13:20:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:40,931 INFO L93 Difference]: Finished difference Result 146 states and 343 transitions. [2020-10-11 13:20:40,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-11 13:20:40,932 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-11 13:20:40,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:40,933 INFO L225 Difference]: With dead ends: 146 [2020-10-11 13:20:40,933 INFO L226 Difference]: Without dead ends: 140 [2020-10-11 13:20:40,933 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1175, Invalid=3247, Unknown=0, NotChecked=0, Total=4422 [2020-10-11 13:20:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-11 13:20:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 94. [2020-10-11 13:20:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-11 13:20:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-10-11 13:20:40,936 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 31 [2020-10-11 13:20:40,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:40,936 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-10-11 13:20:40,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:20:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-10-11 13:20:40,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:40,936 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:40,937 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:41,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-10-11 13:20:41,137 INFO L429 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:41,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:41,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1814538915, now seen corresponding path program 301 times [2020-10-11 13:20:41,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:41,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774011087] [2020-10-11 13:20:41,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:41,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774011087] [2020-10-11 13:20:41,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864589526] [2020-10-11 13:20:41,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:41,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:41,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:41,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:41,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-11 13:20:41,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294309465] [2020-10-11 13:20:41,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:20:41,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:41,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:20:41,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:20:41,794 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 27 states. [2020-10-11 13:20:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:43,805 INFO L93 Difference]: Finished difference Result 147 states and 347 transitions. [2020-10-11 13:20:43,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-11 13:20:43,806 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-11 13:20:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:43,806 INFO L225 Difference]: With dead ends: 147 [2020-10-11 13:20:43,807 INFO L226 Difference]: Without dead ends: 141 [2020-10-11 13:20:43,807 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1280, Invalid=3276, Unknown=0, NotChecked=0, Total=4556 [2020-10-11 13:20:43,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-11 13:20:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2020-10-11 13:20:43,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-11 13:20:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 247 transitions. [2020-10-11 13:20:43,809 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 247 transitions. Word has length 31 [2020-10-11 13:20:43,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:43,810 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 247 transitions. [2020-10-11 13:20:43,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:20:43,810 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 247 transitions. [2020-10-11 13:20:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:43,810 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:43,811 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:44,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:44,011 INFO L429 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:44,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:44,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1294795839, now seen corresponding path program 302 times [2020-10-11 13:20:44,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:44,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939815929] [2020-10-11 13:20:44,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:44,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939815929] [2020-10-11 13:20:44,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404089365] [2020-10-11 13:20:44,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:44,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:20:44,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:44,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:44,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:44,670 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:20:44,698 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:44,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:44,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-11 13:20:44,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598190633] [2020-10-11 13:20:44,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:20:44,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:44,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:20:44,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:20:44,700 INFO L87 Difference]: Start difference. First operand 97 states and 247 transitions. Second operand 28 states. [2020-10-11 13:20:47,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:47,118 INFO L93 Difference]: Finished difference Result 144 states and 341 transitions. [2020-10-11 13:20:47,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-11 13:20:47,119 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-11 13:20:47,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:47,120 INFO L225 Difference]: With dead ends: 144 [2020-10-11 13:20:47,120 INFO L226 Difference]: Without dead ends: 138 [2020-10-11 13:20:47,120 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1288, Invalid=3404, Unknown=0, NotChecked=0, Total=4692 [2020-10-11 13:20:47,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-11 13:20:47,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2020-10-11 13:20:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-11 13:20:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-10-11 13:20:47,122 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 31 [2020-10-11 13:20:47,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:47,123 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-10-11 13:20:47,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:20:47,123 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-10-11 13:20:47,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:47,123 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:47,123 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:47,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-10-11 13:20:47,324 INFO L429 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:47,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:47,324 INFO L82 PathProgramCache]: Analyzing trace with hash 360515391, now seen corresponding path program 303 times [2020-10-11 13:20:47,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:47,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397417905] [2020-10-11 13:20:47,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:47,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397417905] [2020-10-11 13:20:47,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255467344] [2020-10-11 13:20:47,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:47,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-11 13:20:47,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:47,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:47,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:47,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:47,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-11 13:20:47,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942712486] [2020-10-11 13:20:47,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:20:47,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:47,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:20:47,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:20:47,983 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 27 states. [2020-10-11 13:20:50,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:50,128 INFO L93 Difference]: Finished difference Result 145 states and 345 transitions. [2020-10-11 13:20:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-11 13:20:50,130 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-11 13:20:50,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:50,130 INFO L225 Difference]: With dead ends: 145 [2020-10-11 13:20:50,130 INFO L226 Difference]: Without dead ends: 139 [2020-10-11 13:20:50,130 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1408, Invalid=3422, Unknown=0, NotChecked=0, Total=4830 [2020-10-11 13:20:50,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-11 13:20:50,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2020-10-11 13:20:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 13:20:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-10-11 13:20:50,133 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 31 [2020-10-11 13:20:50,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:50,133 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-10-11 13:20:50,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:20:50,133 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-10-11 13:20:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:50,133 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:50,133 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:50,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:50,334 INFO L429 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:50,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:50,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1359612253, now seen corresponding path program 304 times [2020-10-11 13:20:50,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:50,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028451820] [2020-10-11 13:20:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:50,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028451820] [2020-10-11 13:20:50,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300195964] [2020-10-11 13:20:50,896 INFO L93 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:50,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:20:50,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:50,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:50,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:50,994 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:20:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:51,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:51,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-11 13:20:51,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631668137] [2020-10-11 13:20:51,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:20:51,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:51,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:20:51,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:20:51,029 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 28 states. [2020-10-11 13:20:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:53,638 INFO L93 Difference]: Finished difference Result 142 states and 339 transitions. [2020-10-11 13:20:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-11 13:20:53,640 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-11 13:20:53,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:53,640 INFO L225 Difference]: With dead ends: 142 [2020-10-11 13:20:53,640 INFO L226 Difference]: Without dead ends: 136 [2020-10-11 13:20:53,640 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1417, Invalid=3553, Unknown=0, NotChecked=0, Total=4970 [2020-10-11 13:20:53,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-11 13:20:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2020-10-11 13:20:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 13:20:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-10-11 13:20:53,642 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 31 [2020-10-11 13:20:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:53,643 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-10-11 13:20:53,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:20:53,643 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-10-11 13:20:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:53,643 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:53,643 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:53,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2020-10-11 13:20:53,844 INFO L429 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:53,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:53,844 INFO L82 PathProgramCache]: Analyzing trace with hash -888616543, now seen corresponding path program 305 times [2020-10-11 13:20:53,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:53,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764016104] [2020-10-11 13:20:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:54,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764016104] [2020-10-11 13:20:54,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42740834] [2020-10-11 13:20:54,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:54,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-11 13:20:54,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:54,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:54,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:54,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:54,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-11 13:20:54,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580592868] [2020-10-11 13:20:54,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:20:54,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:54,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:20:54,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:20:54,532 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 27 states. [2020-10-11 13:20:56,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:20:56,821 INFO L93 Difference]: Finished difference Result 143 states and 343 transitions. [2020-10-11 13:20:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-11 13:20:56,822 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-11 13:20:56,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:20:56,823 INFO L225 Difference]: With dead ends: 143 [2020-10-11 13:20:56,823 INFO L226 Difference]: Without dead ends: 137 [2020-10-11 13:20:56,823 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1552, Invalid=3560, Unknown=0, NotChecked=0, Total=5112 [2020-10-11 13:20:56,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-11 13:20:56,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2020-10-11 13:20:56,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-11 13:20:56,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 259 transitions. [2020-10-11 13:20:56,825 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 259 transitions. Word has length 31 [2020-10-11 13:20:56,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:20:56,825 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 259 transitions. [2020-10-11 13:20:56,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:20:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 259 transitions. [2020-10-11 13:20:56,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:20:56,826 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:20:56,826 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:20:57,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:57,026 INFO L429 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:20:57,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:20:57,027 INFO L82 PathProgramCache]: Analyzing trace with hash -872529403, now seen corresponding path program 306 times [2020-10-11 13:20:57,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:20:57,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037461933] [2020-10-11 13:20:57,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:20:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:20:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:57,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037461933] [2020-10-11 13:20:57,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962477271] [2020-10-11 13:20:57,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:20:57,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-11 13:20:57,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:20:57,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:20:57,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:20:57,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:20:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:20:57,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:20:57,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-11 13:20:57,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258242544] [2020-10-11 13:20:57,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:20:57,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:20:57,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:20:57,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:20:57,723 INFO L87 Difference]: Start difference. First operand 101 states and 259 transitions. Second operand 28 states. [2020-10-11 13:21:00,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:00,494 INFO L93 Difference]: Finished difference Result 140 states and 337 transitions. [2020-10-11 13:21:00,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-11 13:21:00,495 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-11 13:21:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:00,496 INFO L225 Difference]: With dead ends: 140 [2020-10-11 13:21:00,496 INFO L226 Difference]: Without dead ends: 134 [2020-10-11 13:21:00,496 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1562, Invalid=3694, Unknown=0, NotChecked=0, Total=5256 [2020-10-11 13:21:00,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-11 13:21:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 100. [2020-10-11 13:21:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-11 13:21:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-10-11 13:21:00,498 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 31 [2020-10-11 13:21:00,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:00,499 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-10-11 13:21:00,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:21:00,499 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-10-11 13:21:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:21:00,499 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:00,499 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:00,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:00,700 INFO L429 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:00,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash -872039293, now seen corresponding path program 307 times [2020-10-11 13:21:00,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:00,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995392827] [2020-10-11 13:21:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:01,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995392827] [2020-10-11 13:21:01,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482000157] [2020-10-11 13:21:01,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:01,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-11 13:21:01,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:01,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:01,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-10-11 13:21:01,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744970561] [2020-10-11 13:21:01,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-11 13:21:01,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:01,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-11 13:21:01,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-10-11 13:21:01,369 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 27 states. [2020-10-11 13:21:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:03,744 INFO L93 Difference]: Finished difference Result 160 states and 387 transitions. [2020-10-11 13:21:03,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-11 13:21:03,745 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-10-11 13:21:03,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:03,746 INFO L225 Difference]: With dead ends: 160 [2020-10-11 13:21:03,746 INFO L226 Difference]: Without dead ends: 154 [2020-10-11 13:21:03,746 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1712, Invalid=3690, Unknown=0, NotChecked=0, Total=5402 [2020-10-11 13:21:03,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-11 13:21:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 106. [2020-10-11 13:21:03,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-11 13:21:03,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 277 transitions. [2020-10-11 13:21:03,748 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 277 transitions. Word has length 31 [2020-10-11 13:21:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:03,749 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 277 transitions. [2020-10-11 13:21:03,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-11 13:21:03,749 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 277 transitions. [2020-10-11 13:21:03,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-11 13:21:03,749 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:03,749 INFO L421 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:03,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2020-10-11 13:21:03,950 INFO L429 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:03,950 INFO L82 PathProgramCache]: Analyzing trace with hash -872022553, now seen corresponding path program 308 times [2020-10-11 13:21:03,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:03,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887697892] [2020-10-11 13:21:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:04,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887697892] [2020-10-11 13:21:04,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691327381] [2020-10-11 13:21:04,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:04,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:21:04,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:21:04,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:04,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:04,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:04,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-10-11 13:21:04,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297487926] [2020-10-11 13:21:04,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:21:04,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:04,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:21:04,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:21:04,652 INFO L87 Difference]: Start difference. First operand 106 states and 277 transitions. Second operand 28 states. [2020-10-11 13:21:07,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:07,397 INFO L93 Difference]: Finished difference Result 141 states and 343 transitions. [2020-10-11 13:21:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-11 13:21:07,399 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-10-11 13:21:07,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:07,399 INFO L225 Difference]: With dead ends: 141 [2020-10-11 13:21:07,399 INFO L226 Difference]: Without dead ends: 133 [2020-10-11 13:21:07,399 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1555, Invalid=3995, Unknown=0, NotChecked=0, Total=5550 [2020-10-11 13:21:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-11 13:21:07,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2020-10-11 13:21:07,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-11 13:21:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-10-11 13:21:07,402 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-10-11 13:21:07,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:07,402 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-10-11 13:21:07,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:21:07,402 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-10-11 13:21:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:07,402 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:07,402 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:07,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:07,603 INFO L429 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:07,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:07,604 INFO L82 PathProgramCache]: Analyzing trace with hash 470887608, now seen corresponding path program 309 times [2020-10-11 13:21:07,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:07,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416696067] [2020-10-11 13:21:07,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:08,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416696067] [2020-10-11 13:21:08,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722159683] [2020-10-11 13:21:08,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:08,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-11 13:21:08,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:21:08,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:08,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:08,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:08,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-11 13:21:08,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578334719] [2020-10-11 13:21:08,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:21:08,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:08,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:21:08,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:21:08,492 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 28 states. [2020-10-11 13:21:09,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:09,736 INFO L93 Difference]: Finished difference Result 164 states and 387 transitions. [2020-10-11 13:21:09,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:21:09,738 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-11 13:21:09,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:09,738 INFO L225 Difference]: With dead ends: 164 [2020-10-11 13:21:09,738 INFO L226 Difference]: Without dead ends: 158 [2020-10-11 13:21:09,738 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=841, Invalid=1915, Unknown=0, NotChecked=0, Total=2756 [2020-10-11 13:21:09,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-11 13:21:09,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 105. [2020-10-11 13:21:09,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-11 13:21:09,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-11 13:21:09,741 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-11 13:21:09,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:09,741 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-11 13:21:09,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:21:09,741 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-11 13:21:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:09,742 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:09,742 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:09,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-10-11 13:21:09,942 INFO L429 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:09,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:09,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1353020644, now seen corresponding path program 310 times [2020-10-11 13:21:09,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:09,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398350165] [2020-10-11 13:21:09,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:10,754 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:10,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398350165] [2020-10-11 13:21:10,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524078538] [2020-10-11 13:21:10,754 INFO L93 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:10,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:21:10,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:21:10,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:10,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:10,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:21:10,872 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:10,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:10,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-11 13:21:10,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836873324] [2020-10-11 13:21:10,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:21:10,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:10,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:21:10,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:21:10,873 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-11 13:21:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:12,425 INFO L93 Difference]: Finished difference Result 161 states and 381 transitions. [2020-10-11 13:21:12,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:21:12,427 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-11 13:21:12,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:12,427 INFO L225 Difference]: With dead ends: 161 [2020-10-11 13:21:12,427 INFO L226 Difference]: Without dead ends: 155 [2020-10-11 13:21:12,428 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=897, Invalid=2183, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 13:21:12,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-11 13:21:12,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 104. [2020-10-11 13:21:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 13:21:12,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-11 13:21:12,430 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-11 13:21:12,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:12,430 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-11 13:21:12,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:21:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-11 13:21:12,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:12,430 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:12,430 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:12,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-10-11 13:21:12,631 INFO L429 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:12,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:12,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2116672154, now seen corresponding path program 311 times [2020-10-11 13:21:12,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:12,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402353835] [2020-10-11 13:21:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:12,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:13,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402353835] [2020-10-11 13:21:13,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320730284] [2020-10-11 13:21:13,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:13,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-11 13:21:13,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:21:13,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:13,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:13,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:13,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-11 13:21:13,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812810176] [2020-10-11 13:21:13,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:21:13,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:13,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:21:13,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:21:13,483 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-11 13:21:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:14,893 INFO L93 Difference]: Finished difference Result 158 states and 375 transitions. [2020-10-11 13:21:14,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:21:14,895 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-11 13:21:14,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:14,895 INFO L225 Difference]: With dead ends: 158 [2020-10-11 13:21:14,896 INFO L226 Difference]: Without dead ends: 152 [2020-10-11 13:21:14,896 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=842, Invalid=2128, Unknown=0, NotChecked=0, Total=2970 [2020-10-11 13:21:14,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-11 13:21:14,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 105. [2020-10-11 13:21:14,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-11 13:21:14,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-11 13:21:14,898 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-11 13:21:14,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:14,898 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-11 13:21:14,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:21:14,898 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-11 13:21:14,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:14,898 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:14,898 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:15,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-10-11 13:21:15,099 INFO L429 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:15,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:15,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1077903870, now seen corresponding path program 312 times [2020-10-11 13:21:15,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:15,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119691167] [2020-10-11 13:21:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:15,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119691167] [2020-10-11 13:21:15,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634482495] [2020-10-11 13:21:15,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:15,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-11 13:21:15,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:21:15,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:15,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:16,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:21:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:16,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:16,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-11 13:21:16,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013276280] [2020-10-11 13:21:16,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:21:16,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:16,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:21:16,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:21:16,033 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-11 13:21:17,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:17,738 INFO L93 Difference]: Finished difference Result 157 states and 373 transitions. [2020-10-11 13:21:17,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:21:17,740 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-11 13:21:17,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:17,740 INFO L225 Difference]: With dead ends: 157 [2020-10-11 13:21:17,740 INFO L226 Difference]: Without dead ends: 151 [2020-10-11 13:21:17,741 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2020-10-11 13:21:17,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-11 13:21:17,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 104. [2020-10-11 13:21:17,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 13:21:17,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-11 13:21:17,743 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-11 13:21:17,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:17,743 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-11 13:21:17,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:21:17,743 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-11 13:21:17,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:17,743 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:17,743 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:17,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-10-11 13:21:17,944 INFO L429 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:17,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:17,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1492687100, now seen corresponding path program 313 times [2020-10-11 13:21:17,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:17,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667795446] [2020-10-11 13:21:17,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:18,688 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:18,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667795446] [2020-10-11 13:21:18,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005844025] [2020-10-11 13:21:18,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:18,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:18,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:18,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:18,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-11 13:21:18,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999218913] [2020-10-11 13:21:18,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:21:18,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:18,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:21:18,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:21:18,766 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-11 13:21:20,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:20,292 INFO L93 Difference]: Finished difference Result 154 states and 367 transitions. [2020-10-11 13:21:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:21:20,294 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-11 13:21:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:20,294 INFO L225 Difference]: With dead ends: 154 [2020-10-11 13:21:20,294 INFO L226 Difference]: Without dead ends: 148 [2020-10-11 13:21:20,295 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=859, Invalid=2333, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:21:20,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-11 13:21:20,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2020-10-11 13:21:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-11 13:21:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-11 13:21:20,297 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-11 13:21:20,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:20,297 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-11 13:21:20,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:21:20,298 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-11 13:21:20,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:20,298 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:20,298 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:20,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:20,506 INFO L429 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:20,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:20,507 INFO L82 PathProgramCache]: Analyzing trace with hash -229062304, now seen corresponding path program 314 times [2020-10-11 13:21:20,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:20,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042712751] [2020-10-11 13:21:20,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:21,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042712751] [2020-10-11 13:21:21,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553440172] [2020-10-11 13:21:21,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:21,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:21:21,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:21:21,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:21,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:21,357 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:21:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:21,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:21,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-11 13:21:21,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031126118] [2020-10-11 13:21:21,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:21:21,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:21,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:21:21,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:21:21,378 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-11 13:21:23,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:23,235 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-10-11 13:21:23,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:21:23,236 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-11 13:21:23,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:23,237 INFO L225 Difference]: With dead ends: 153 [2020-10-11 13:21:23,237 INFO L226 Difference]: Without dead ends: 147 [2020-10-11 13:21:23,237 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:21:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-11 13:21:23,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 104. [2020-10-11 13:21:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 13:21:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-11 13:21:23,239 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-11 13:21:23,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:23,240 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-11 13:21:23,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:21:23,240 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-11 13:21:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:23,240 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:23,240 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:23,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-10-11 13:21:23,441 INFO L429 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:23,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:23,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1412986914, now seen corresponding path program 315 times [2020-10-11 13:21:23,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:23,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576559118] [2020-10-11 13:21:23,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:24,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576559118] [2020-10-11 13:21:24,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617994464] [2020-10-11 13:21:24,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:24,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-11 13:21:24,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:21:24,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:24,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:24,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:24,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-11 13:21:24,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667755627] [2020-10-11 13:21:24,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:21:24,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:24,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:21:24,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:21:24,257 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-11 13:21:25,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:25,943 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-10-11 13:21:25,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:21:25,945 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-11 13:21:25,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:25,945 INFO L225 Difference]: With dead ends: 150 [2020-10-11 13:21:25,945 INFO L226 Difference]: Without dead ends: 144 [2020-10-11 13:21:25,946 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-10-11 13:21:25,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-11 13:21:25,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 105. [2020-10-11 13:21:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-11 13:21:25,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-11 13:21:25,948 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-11 13:21:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:25,948 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-11 13:21:25,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:21:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-11 13:21:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:25,948 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:25,948 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:26,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-10-11 13:21:26,149 INFO L429 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:26,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:26,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1333821762, now seen corresponding path program 316 times [2020-10-11 13:21:26,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:26,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951153052] [2020-10-11 13:21:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:26,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951153052] [2020-10-11 13:21:26,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161802465] [2020-10-11 13:21:26,887 INFO L93 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 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:26,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:21:26,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:21:26,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:26,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:26,987 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:21:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:27,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:27,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-11 13:21:27,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834337759] [2020-10-11 13:21:27,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:21:27,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:27,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:21:27,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:21:27,012 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-11 13:21:29,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:29,063 INFO L93 Difference]: Finished difference Result 149 states and 357 transitions. [2020-10-11 13:21:29,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:21:29,064 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-11 13:21:29,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:29,065 INFO L225 Difference]: With dead ends: 149 [2020-10-11 13:21:29,065 INFO L226 Difference]: Without dead ends: 143 [2020-10-11 13:21:29,065 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=969, Invalid=2813, Unknown=0, NotChecked=0, Total=3782 [2020-10-11 13:21:29,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-11 13:21:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2020-10-11 13:21:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 13:21:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-11 13:21:29,067 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-11 13:21:29,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:29,067 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-11 13:21:29,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:21:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-11 13:21:29,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:29,068 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:29,068 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:29,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2020-10-11 13:21:29,269 INFO L429 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:29,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:29,269 INFO L82 PathProgramCache]: Analyzing trace with hash 32032576, now seen corresponding path program 317 times [2020-10-11 13:21:29,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:29,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025571563] [2020-10-11 13:21:29,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:29,974 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:29,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025571563] [2020-10-11 13:21:29,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209588259] [2020-10-11 13:21:29,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:30,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-11 13:21:30,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:21:30,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:30,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:30,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:30,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-11 13:21:30,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064517499] [2020-10-11 13:21:30,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:21:30,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:30,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:21:30,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:21:30,062 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-11 13:21:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:31,934 INFO L93 Difference]: Finished difference Result 146 states and 351 transitions. [2020-10-11 13:21:31,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:21:31,936 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-11 13:21:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:31,937 INFO L225 Difference]: With dead ends: 146 [2020-10-11 13:21:31,937 INFO L226 Difference]: Without dead ends: 140 [2020-10-11 13:21:31,937 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=941, Invalid=2719, Unknown=0, NotChecked=0, Total=3660 [2020-10-11 13:21:31,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-11 13:21:31,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2020-10-11 13:21:31,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-11 13:21:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-11 13:21:31,939 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-11 13:21:31,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:31,939 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-11 13:21:31,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:21:31,940 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-11 13:21:31,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:31,940 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:31,940 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:32,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:32,141 INFO L429 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:32,141 INFO L82 PathProgramCache]: Analyzing trace with hash -778516060, now seen corresponding path program 318 times [2020-10-11 13:21:32,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:32,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647561155] [2020-10-11 13:21:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:32,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647561155] [2020-10-11 13:21:32,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141344366] [2020-10-11 13:21:32,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:32,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-11 13:21:32,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:21:32,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:32,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:32,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:21:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:33,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:33,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-11 13:21:33,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291281676] [2020-10-11 13:21:33,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:21:33,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:33,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:21:33,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:21:33,012 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-11 13:21:35,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:35,257 INFO L93 Difference]: Finished difference Result 145 states and 349 transitions. [2020-10-11 13:21:35,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:21:35,259 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-11 13:21:35,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:35,260 INFO L225 Difference]: With dead ends: 145 [2020-10-11 13:21:35,260 INFO L226 Difference]: Without dead ends: 139 [2020-10-11 13:21:35,260 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-10-11 13:21:35,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-11 13:21:35,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 104. [2020-10-11 13:21:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 13:21:35,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-11 13:21:35,262 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-11 13:21:35,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:35,263 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-11 13:21:35,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:21:35,263 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-11 13:21:35,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:35,263 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:35,263 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:35,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:35,464 INFO L429 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:35,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:35,464 INFO L82 PathProgramCache]: Analyzing trace with hash -726239454, now seen corresponding path program 319 times [2020-10-11 13:21:35,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:35,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606912749] [2020-10-11 13:21:35,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:36,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606912749] [2020-10-11 13:21:36,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848282603] [2020-10-11 13:21:36,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:36,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:36,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:36,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:36,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-11 13:21:36,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145980104] [2020-10-11 13:21:36,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:21:36,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:36,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:21:36,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:21:36,227 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-11 13:21:38,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:38,201 INFO L93 Difference]: Finished difference Result 142 states and 343 transitions. [2020-10-11 13:21:38,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:21:38,202 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-11 13:21:38,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:38,203 INFO L225 Difference]: With dead ends: 142 [2020-10-11 13:21:38,203 INFO L226 Difference]: Without dead ends: 136 [2020-10-11 13:21:38,204 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1006, Invalid=2900, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 13:21:38,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-11 13:21:38,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2020-10-11 13:21:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-11 13:21:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-11 13:21:38,205 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-11 13:21:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:38,205 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-11 13:21:38,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:21:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-11 13:21:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:38,206 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:38,206 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:38,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2020-10-11 13:21:38,407 INFO L429 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:38,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:38,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1150009990, now seen corresponding path program 320 times [2020-10-11 13:21:38,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:38,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861699003] [2020-10-11 13:21:38,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:39,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861699003] [2020-10-11 13:21:39,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271305213] [2020-10-11 13:21:39,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:39,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:21:39,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:21:39,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:39,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:39,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:21:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:39,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:39,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-11 13:21:39,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382470289] [2020-10-11 13:21:39,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:21:39,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:39,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:21:39,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:21:39,254 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-11 13:21:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:41,669 INFO L93 Difference]: Finished difference Result 141 states and 341 transitions. [2020-10-11 13:21:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 13:21:41,671 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-11 13:21:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:41,672 INFO L225 Difference]: With dead ends: 141 [2020-10-11 13:21:41,672 INFO L226 Difference]: Without dead ends: 135 [2020-10-11 13:21:41,672 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1097, Invalid=3193, Unknown=0, NotChecked=0, Total=4290 [2020-10-11 13:21:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-11 13:21:41,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2020-10-11 13:21:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 13:21:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-11 13:21:41,675 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-11 13:21:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:41,675 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-11 13:21:41,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:21:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-11 13:21:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:41,675 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:41,675 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:41,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2020-10-11 13:21:41,876 INFO L429 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:41,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:41,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1838331780, now seen corresponding path program 321 times [2020-10-11 13:21:41,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:41,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796115639] [2020-10-11 13:21:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:41,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:42,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796115639] [2020-10-11 13:21:42,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605871063] [2020-10-11 13:21:42,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:42,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-11 13:21:42,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:21:42,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:42,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:42,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:42,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-11 13:21:42,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175055554] [2020-10-11 13:21:42,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:21:42,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:42,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:21:42,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:21:42,662 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-11 13:21:44,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:44,802 INFO L93 Difference]: Finished difference Result 138 states and 335 transitions. [2020-10-11 13:21:44,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 13:21:44,804 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-11 13:21:44,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:44,805 INFO L225 Difference]: With dead ends: 138 [2020-10-11 13:21:44,805 INFO L226 Difference]: Without dead ends: 132 [2020-10-11 13:21:44,805 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1087, Invalid=3073, Unknown=0, NotChecked=0, Total=4160 [2020-10-11 13:21:44,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-11 13:21:44,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 105. [2020-10-11 13:21:44,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-11 13:21:44,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-11 13:21:44,808 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-11 13:21:44,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:44,808 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-11 13:21:44,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:21:44,808 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-11 13:21:44,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:44,808 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:44,808 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:45,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2020-10-11 13:21:45,009 INFO L429 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:45,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1471443992, now seen corresponding path program 322 times [2020-10-11 13:21:45,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:45,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526171448] [2020-10-11 13:21:45,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:45,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526171448] [2020-10-11 13:21:45,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408728089] [2020-10-11 13:21:45,701 INFO L93 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 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:45,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:21:45,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:21:45,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:45,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:45,805 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:21:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:45,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:45,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-11 13:21:45,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873769294] [2020-10-11 13:21:45,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:21:45,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:45,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:21:45,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:21:45,834 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-11 13:21:48,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:48,453 INFO L93 Difference]: Finished difference Result 137 states and 333 transitions. [2020-10-11 13:21:48,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-11 13:21:48,455 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-11 13:21:48,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:48,455 INFO L225 Difference]: With dead ends: 137 [2020-10-11 13:21:48,455 INFO L226 Difference]: Without dead ends: 131 [2020-10-11 13:21:48,456 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1185, Invalid=3371, Unknown=0, NotChecked=0, Total=4556 [2020-10-11 13:21:48,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-11 13:21:48,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 104. [2020-10-11 13:21:48,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 13:21:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-11 13:21:48,458 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-11 13:21:48,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:48,458 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-11 13:21:48,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:21:48,458 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-11 13:21:48,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:48,458 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:48,458 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:48,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2020-10-11 13:21:48,659 INFO L429 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:48,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:48,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1206364262, now seen corresponding path program 323 times [2020-10-11 13:21:48,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:48,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592525306] [2020-10-11 13:21:48,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:49,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592525306] [2020-10-11 13:21:49,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037294593] [2020-10-11 13:21:49,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:49,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-11 13:21:49,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:21:49,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:49,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:49,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:49,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-11 13:21:49,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7892939] [2020-10-11 13:21:49,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:21:49,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:49,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:21:49,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:21:49,498 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-11 13:21:51,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:51,807 INFO L93 Difference]: Finished difference Result 134 states and 327 transitions. [2020-10-11 13:21:51,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 13:21:51,809 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-11 13:21:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:51,810 INFO L225 Difference]: With dead ends: 134 [2020-10-11 13:21:51,810 INFO L226 Difference]: Without dead ends: 128 [2020-10-11 13:21:51,810 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1184, Invalid=3238, Unknown=0, NotChecked=0, Total=4422 [2020-10-11 13:21:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-11 13:21:51,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2020-10-11 13:21:51,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-11 13:21:51,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-11 13:21:51,813 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-11 13:21:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:51,813 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-11 13:21:51,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:21:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-11 13:21:51,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:51,813 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:51,813 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:52,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:52,014 INFO L429 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:52,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:52,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1831713334, now seen corresponding path program 324 times [2020-10-11 13:21:52,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:52,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410510175] [2020-10-11 13:21:52,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:52,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410510175] [2020-10-11 13:21:52,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004768989] [2020-10-11 13:21:52,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:52,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-11 13:21:52,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:21:52,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:52,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:52,811 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:21:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:52,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:52,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-11 13:21:52,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381285763] [2020-10-11 13:21:52,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:21:52,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:52,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:21:52,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:21:52,844 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-11 13:21:55,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:55,640 INFO L93 Difference]: Finished difference Result 133 states and 325 transitions. [2020-10-11 13:21:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-11 13:21:55,642 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-11 13:21:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:55,643 INFO L225 Difference]: With dead ends: 133 [2020-10-11 13:21:55,643 INFO L226 Difference]: Without dead ends: 127 [2020-10-11 13:21:55,644 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1289, Invalid=3541, Unknown=0, NotChecked=0, Total=4830 [2020-10-11 13:21:55,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-11 13:21:55,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2020-10-11 13:21:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 13:21:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-11 13:21:55,645 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-11 13:21:55,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:55,646 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-11 13:21:55,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:21:55,646 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-11 13:21:55,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:55,646 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:55,646 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:55,846 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2020-10-11 13:21:55,847 INFO L429 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:55,847 INFO L82 PathProgramCache]: Analyzing trace with hash -215520824, now seen corresponding path program 325 times [2020-10-11 13:21:55,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:55,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624894122] [2020-10-11 13:21:55,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:56,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624894122] [2020-10-11 13:21:56,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304140405] [2020-10-11 13:21:56,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:56,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:56,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:21:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:56,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:21:56,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-11 13:21:56,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866859886] [2020-10-11 13:21:56,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:21:56,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:21:56,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:21:56,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:21:56,605 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-11 13:21:59,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:21:59,041 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-10-11 13:21:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-11 13:21:59,043 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-11 13:21:59,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:21:59,043 INFO L225 Difference]: With dead ends: 130 [2020-10-11 13:21:59,043 INFO L226 Difference]: Without dead ends: 124 [2020-10-11 13:21:59,044 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1297, Invalid=3395, Unknown=0, NotChecked=0, Total=4692 [2020-10-11 13:21:59,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-11 13:21:59,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2020-10-11 13:21:59,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-11 13:21:59,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-11 13:21:59,046 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-11 13:21:59,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:21:59,046 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-11 13:21:59,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:21:59,047 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-11 13:21:59,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:21:59,047 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:21:59,047 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:21:59,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:59,248 INFO L429 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:21:59,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:21:59,248 INFO L82 PathProgramCache]: Analyzing trace with hash 304222252, now seen corresponding path program 326 times [2020-10-11 13:21:59,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:21:59,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842777438] [2020-10-11 13:21:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:21:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:21:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:21:59,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842777438] [2020-10-11 13:21:59,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826470522] [2020-10-11 13:21:59,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:21:59,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:21:59,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:21:59,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:21:59,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:00,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:22:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:00,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:00,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-11 13:22:00,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895775743] [2020-10-11 13:22:00,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:22:00,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:00,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:22:00,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:22:00,077 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-11 13:22:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:22:03,139 INFO L93 Difference]: Finished difference Result 129 states and 317 transitions. [2020-10-11 13:22:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-11 13:22:03,141 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-11 13:22:03,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:22:03,142 INFO L225 Difference]: With dead ends: 129 [2020-10-11 13:22:03,142 INFO L226 Difference]: Without dead ends: 123 [2020-10-11 13:22:03,148 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1409, Invalid=3703, Unknown=0, NotChecked=0, Total=5112 [2020-10-11 13:22:03,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-11 13:22:03,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2020-10-11 13:22:03,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 13:22:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-11 13:22:03,149 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-11 13:22:03,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:22:03,150 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-11 13:22:03,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:22:03,150 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-11 13:22:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:22:03,150 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:22:03,150 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:22:03,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2020-10-11 13:22:03,351 INFO L429 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:22:03,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:22:03,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1959533482, now seen corresponding path program 327 times [2020-10-11 13:22:03,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:22:03,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029198752] [2020-10-11 13:22:03,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:22:03,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:04,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029198752] [2020-10-11 13:22:04,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701548652] [2020-10-11 13:22:04,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:04,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-11 13:22:04,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:22:04,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:22:04,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:04,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:04,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-11 13:22:04,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547231492] [2020-10-11 13:22:04,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:22:04,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:04,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:22:04,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:22:04,143 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-11 13:22:06,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:22:06,756 INFO L93 Difference]: Finished difference Result 126 states and 311 transitions. [2020-10-11 13:22:06,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-11 13:22:06,758 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-11 13:22:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:22:06,759 INFO L225 Difference]: With dead ends: 126 [2020-10-11 13:22:06,759 INFO L226 Difference]: Without dead ends: 120 [2020-10-11 13:22:06,759 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1426, Invalid=3544, Unknown=0, NotChecked=0, Total=4970 [2020-10-11 13:22:06,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-11 13:22:06,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 105. [2020-10-11 13:22:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-11 13:22:06,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-11 13:22:06,761 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-11 13:22:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:22:06,761 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-11 13:22:06,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:22:06,761 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-11 13:22:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:22:06,761 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:22:06,761 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:22:06,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:06,962 INFO L429 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:22:06,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:22:06,962 INFO L82 PathProgramCache]: Analyzing trace with hash 239405838, now seen corresponding path program 328 times [2020-10-11 13:22:06,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:22:06,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636532376] [2020-10-11 13:22:06,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:22:06,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:07,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636532376] [2020-10-11 13:22:07,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145070842] [2020-10-11 13:22:07,647 INFO L93 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 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:07,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:22:07,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:22:07,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:22:07,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:07,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:22:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:07,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:07,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-11 13:22:07,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718368382] [2020-10-11 13:22:07,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:22:07,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:07,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:22:07,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:22:07,800 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-11 13:22:11,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:22:11,117 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-10-11 13:22:11,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-11 13:22:11,119 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-11 13:22:11,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:22:11,120 INFO L225 Difference]: With dead ends: 125 [2020-10-11 13:22:11,120 INFO L226 Difference]: Without dead ends: 119 [2020-10-11 13:22:11,120 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1545, Invalid=3857, Unknown=0, NotChecked=0, Total=5402 [2020-10-11 13:22:11,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-11 13:22:11,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2020-10-11 13:22:11,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 13:22:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-11 13:22:11,122 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-11 13:22:11,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:22:11,122 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-11 13:22:11,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:22:11,123 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-11 13:22:11,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:22:11,123 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:22:11,123 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:22:11,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2020-10-11 13:22:11,324 INFO L429 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:22:11,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:22:11,324 INFO L82 PathProgramCache]: Analyzing trace with hash 710401548, now seen corresponding path program 329 times [2020-10-11 13:22:11,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:22:11,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665174497] [2020-10-11 13:22:11,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:22:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:11,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665174497] [2020-10-11 13:22:11,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771762636] [2020-10-11 13:22:11,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:12,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-11 13:22:12,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:22:12,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:22:12,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:12,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:12,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-11 13:22:12,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494125235] [2020-10-11 13:22:12,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:22:12,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:12,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:22:12,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:22:12,106 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-11 13:22:14,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:22:14,929 INFO L93 Difference]: Finished difference Result 122 states and 303 transitions. [2020-10-11 13:22:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-11 13:22:14,931 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-11 13:22:14,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:22:14,931 INFO L225 Difference]: With dead ends: 122 [2020-10-11 13:22:14,931 INFO L226 Difference]: Without dead ends: 116 [2020-10-11 13:22:14,932 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2020-10-11 13:22:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-11 13:22:14,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2020-10-11 13:22:14,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-11 13:22:14,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-11 13:22:14,934 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-10-11 13:22:14,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:22:14,934 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-11 13:22:14,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:22:14,934 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-11 13:22:14,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:22:14,935 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:22:14,935 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:22:15,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:15,136 INFO L429 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:22:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:22:15,136 INFO L82 PathProgramCache]: Analyzing trace with hash 726488688, now seen corresponding path program 330 times [2020-10-11 13:22:15,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:22:15,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765652099] [2020-10-11 13:22:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:22:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:15,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765652099] [2020-10-11 13:22:15,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403722302] [2020-10-11 13:22:15,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:15,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-10-11 13:22:15,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:22:15,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:22:15,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:15,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:22:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:15,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:15,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-11 13:22:15,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862892519] [2020-10-11 13:22:15,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:22:15,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:15,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:22:15,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:22:15,957 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-10-11 13:22:19,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:22:19,412 INFO L93 Difference]: Finished difference Result 121 states and 301 transitions. [2020-10-11 13:22:19,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-11 13:22:19,414 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-11 13:22:19,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:22:19,414 INFO L225 Difference]: With dead ends: 121 [2020-10-11 13:22:19,414 INFO L226 Difference]: Without dead ends: 115 [2020-10-11 13:22:19,415 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1697, Invalid=4003, Unknown=0, NotChecked=0, Total=5700 [2020-10-11 13:22:19,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-11 13:22:19,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-10-11 13:22:19,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 13:22:19,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-11 13:22:19,417 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-10-11 13:22:19,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:22:19,417 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-11 13:22:19,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:22:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-11 13:22:19,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:22:19,418 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:22:19,418 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:22:19,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:19,618 INFO L429 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:22:19,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:22:19,619 INFO L82 PathProgramCache]: Analyzing trace with hash 726978798, now seen corresponding path program 331 times [2020-10-11 13:22:19,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:22:19,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338194380] [2020-10-11 13:22:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:22:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:20,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338194380] [2020-10-11 13:22:20,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906292698] [2020-10-11 13:22:20,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:20,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:22:20,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:20,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:20,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-10-11 13:22:20,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348517501] [2020-10-11 13:22:20,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-11 13:22:20,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:20,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-11 13:22:20,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-10-11 13:22:20,418 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-10-11 13:22:23,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:22:23,353 INFO L93 Difference]: Finished difference Result 137 states and 341 transitions. [2020-10-11 13:22:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-11 13:22:23,355 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-10-11 13:22:23,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:22:23,356 INFO L225 Difference]: With dead ends: 137 [2020-10-11 13:22:23,356 INFO L226 Difference]: Without dead ends: 131 [2020-10-11 13:22:23,356 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1732, Invalid=3818, Unknown=0, NotChecked=0, Total=5550 [2020-10-11 13:22:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-11 13:22:23,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 108. [2020-10-11 13:22:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-11 13:22:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 281 transitions. [2020-10-11 13:22:23,359 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 281 transitions. Word has length 32 [2020-10-11 13:22:23,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:22:23,359 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 281 transitions. [2020-10-11 13:22:23,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-11 13:22:23,359 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 281 transitions. [2020-10-11 13:22:23,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:22:23,359 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:22:23,359 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:22:23,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2020-10-11 13:22:23,560 INFO L429 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:22:23,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:22:23,560 INFO L82 PathProgramCache]: Analyzing trace with hash 726995538, now seen corresponding path program 332 times [2020-10-11 13:22:23,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:22:23,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039084959] [2020-10-11 13:22:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:22:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:24,253 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:24,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039084959] [2020-10-11 13:22:24,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246396652] [2020-10-11 13:22:24,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:24,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:22:24,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:22:24,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:22:24,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:24,365 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:22:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:24,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:24,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-11 13:22:24,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116362234] [2020-10-11 13:22:24,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:22:24,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:24,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:22:24,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:22:24,406 INFO L87 Difference]: Start difference. First operand 108 states and 281 transitions. Second operand 29 states. [2020-10-11 13:22:27,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:22:27,882 INFO L93 Difference]: Finished difference Result 118 states and 297 transitions. [2020-10-11 13:22:27,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-11 13:22:27,884 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-11 13:22:27,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:22:27,884 INFO L225 Difference]: With dead ends: 118 [2020-10-11 13:22:27,884 INFO L226 Difference]: Without dead ends: 110 [2020-10-11 13:22:27,885 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1865, Invalid=4141, Unknown=0, NotChecked=0, Total=6006 [2020-10-11 13:22:27,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-11 13:22:27,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2020-10-11 13:22:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-11 13:22:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 188 transitions. [2020-10-11 13:22:27,886 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 188 transitions. Word has length 32 [2020-10-11 13:22:27,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:22:27,886 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 188 transitions. [2020-10-11 13:22:27,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:22:27,886 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 188 transitions. [2020-10-11 13:22:27,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-11 13:22:27,887 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:22:27,887 INFO L421 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:22:28,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2020-10-11 13:22:28,087 INFO L429 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:22:28,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:22:28,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1262879060, now seen corresponding path program 333 times [2020-10-11 13:22:28,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:22:28,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936679227] [2020-10-11 13:22:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:22:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:28,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936679227] [2020-10-11 13:22:28,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692507710] [2020-10-11 13:22:28,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:28,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-10-11 13:22:28,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:22:28,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-11 13:22:28,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:28,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:22:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:28,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:28,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-10-11 13:22:28,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838225723] [2020-10-11 13:22:28,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:22:28,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:28,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:22:28,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:22:28,944 INFO L87 Difference]: Start difference. First operand 77 states and 188 transitions. Second operand 29 states. [2020-10-11 13:22:32,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:22:32,345 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-10-11 13:22:32,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-11 13:22:32,353 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-10-11 13:22:32,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:22:32,353 INFO L225 Difference]: With dead ends: 140 [2020-10-11 13:22:32,353 INFO L226 Difference]: Without dead ends: 135 [2020-10-11 13:22:32,353 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1930, Invalid=4076, Unknown=0, NotChecked=0, Total=6006 [2020-10-11 13:22:32,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-11 13:22:32,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2020-10-11 13:22:32,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-11 13:22:32,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-10-11 13:22:32,355 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 32 [2020-10-11 13:22:32,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:22:32,355 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-10-11 13:22:32,355 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:22:32,355 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-10-11 13:22:32,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:22:32,355 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:22:32,355 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:22:32,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2020-10-11 13:22:32,556 INFO L429 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:22:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:22:32,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1062041505, now seen corresponding path program 334 times [2020-10-11 13:22:32,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:22:32,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491819682] [2020-10-11 13:22:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:22:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:33,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491819682] [2020-10-11 13:22:33,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390094148] [2020-10-11 13:22:33,313 INFO L93 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 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:33,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:22:33,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:22:33,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:22:33,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:33,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:22:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:33,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:33,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-11 13:22:33,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254453330] [2020-10-11 13:22:33,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:22:33,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:33,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:22:33,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:22:33,476 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 30 states. [2020-10-11 13:22:37,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:22:37,048 INFO L93 Difference]: Finished difference Result 114 states and 293 transitions. [2020-10-11 13:22:37,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-11 13:22:37,050 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-11 13:22:37,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:22:37,050 INFO L225 Difference]: With dead ends: 114 [2020-10-11 13:22:37,050 INFO L226 Difference]: Without dead ends: 109 [2020-10-11 13:22:37,051 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1951, Invalid=4211, Unknown=0, NotChecked=0, Total=6162 [2020-10-11 13:22:37,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-11 13:22:37,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2020-10-11 13:22:37,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-11 13:22:37,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-10-11 13:22:37,053 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 33 [2020-10-11 13:22:37,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:22:37,053 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-10-11 13:22:37,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:22:37,053 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-10-11 13:22:37,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:22:37,053 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:22:37,053 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:22:37,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:37,254 INFO L429 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:22:37,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:22:37,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1801619636, now seen corresponding path program 335 times [2020-10-11 13:22:37,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:22:37,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176209036] [2020-10-11 13:22:37,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:22:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:38,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176209036] [2020-10-11 13:22:38,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198128401] [2020-10-11 13:22:38,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:38,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-11 13:22:38,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:22:38,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:22:38,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:38,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:38,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-11 13:22:38,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520680680] [2020-10-11 13:22:38,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:22:38,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:38,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:22:38,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:22:38,310 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 29 states. [2020-10-11 13:22:39,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:22:39,811 INFO L93 Difference]: Finished difference Result 120 states and 279 transitions. [2020-10-11 13:22:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-11 13:22:39,813 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-11 13:22:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:22:39,814 INFO L225 Difference]: With dead ends: 120 [2020-10-11 13:22:39,814 INFO L226 Difference]: Without dead ends: 114 [2020-10-11 13:22:39,814 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=913, Invalid=1949, Unknown=0, NotChecked=0, Total=2862 [2020-10-11 13:22:39,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-11 13:22:39,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-10-11 13:22:39,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:22:39,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 211 transitions. [2020-10-11 13:22:39,816 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 211 transitions. Word has length 33 [2020-10-11 13:22:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:22:39,816 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 211 transitions. [2020-10-11 13:22:39,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:22:39,817 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 211 transitions. [2020-10-11 13:22:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:22:39,817 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:22:39,817 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:22:40,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2020-10-11 13:22:40,018 INFO L429 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:22:40,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:22:40,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2064174256, now seen corresponding path program 336 times [2020-10-11 13:22:40,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:22:40,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468373341] [2020-10-11 13:22:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:22:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:40,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468373341] [2020-10-11 13:22:40,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662695921] [2020-10-11 13:22:40,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:41,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-11 13:22:41,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:22:41,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:22:41,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:41,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:22:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:41,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:41,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-11 13:22:41,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15261311] [2020-10-11 13:22:41,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:22:41,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:41,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:22:41,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:22:41,123 INFO L87 Difference]: Start difference. First operand 86 states and 211 transitions. Second operand 30 states. [2020-10-11 13:22:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:22:42,686 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-10-11 13:22:42,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-11 13:22:42,688 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-11 13:22:42,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:22:42,688 INFO L225 Difference]: With dead ends: 146 [2020-10-11 13:22:42,688 INFO L226 Difference]: Without dead ends: 140 [2020-10-11 13:22:42,689 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=922, Invalid=2158, Unknown=0, NotChecked=0, Total=3080 [2020-10-11 13:22:42,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-11 13:22:42,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-10-11 13:22:42,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-11 13:22:42,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 207 transitions. [2020-10-11 13:22:42,691 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 207 transitions. Word has length 33 [2020-10-11 13:22:42,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:22:42,691 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 207 transitions. [2020-10-11 13:22:42,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:22:42,691 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 207 transitions. [2020-10-11 13:22:42,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:22:42,691 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:22:42,692 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:22:42,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:42,892 INFO L429 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:22:42,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:22:42,893 INFO L82 PathProgramCache]: Analyzing trace with hash -750635858, now seen corresponding path program 337 times [2020-10-11 13:22:42,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:22:42,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148714889] [2020-10-11 13:22:42,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:22:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:43,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148714889] [2020-10-11 13:22:43,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176379695] [2020-10-11 13:22:43,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:43,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:22:43,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:43,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:43,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-11 13:22:43,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875206614] [2020-10-11 13:22:43,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:22:43,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:43,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:22:43,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:22:43,903 INFO L87 Difference]: Start difference. First operand 84 states and 207 transitions. Second operand 29 states. [2020-10-11 13:22:45,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:22:45,618 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-10-11 13:22:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:22:45,620 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-11 13:22:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:22:45,621 INFO L225 Difference]: With dead ends: 147 [2020-10-11 13:22:45,621 INFO L226 Difference]: Without dead ends: 141 [2020-10-11 13:22:45,621 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=922, Invalid=2270, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:22:45,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-11 13:22:45,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 87. [2020-10-11 13:22:45,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-11 13:22:45,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 215 transitions. [2020-10-11 13:22:45,624 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 215 transitions. Word has length 33 [2020-10-11 13:22:45,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:22:45,633 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 215 transitions. [2020-10-11 13:22:45,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:22:45,633 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 215 transitions. [2020-10-11 13:22:45,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:22:45,634 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:22:45,634 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:22:45,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2020-10-11 13:22:45,842 INFO L429 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:22:45,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:22:45,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1720423186, now seen corresponding path program 338 times [2020-10-11 13:22:45,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:22:45,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136061677] [2020-10-11 13:22:45,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:22:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:46,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136061677] [2020-10-11 13:22:46,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889221877] [2020-10-11 13:22:46,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:46,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:22:46,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:22:46,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:22:46,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:46,927 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:22:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:46,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:46,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-11 13:22:46,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792143041] [2020-10-11 13:22:46,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:22:46,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:46,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:22:46,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:22:46,950 INFO L87 Difference]: Start difference. First operand 87 states and 215 transitions. Second operand 30 states. [2020-10-11 13:22:48,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:22:48,741 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2020-10-11 13:22:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:22:48,744 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-11 13:22:48,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:22:48,744 INFO L225 Difference]: With dead ends: 169 [2020-10-11 13:22:48,744 INFO L226 Difference]: Without dead ends: 163 [2020-10-11 13:22:48,744 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=964, Invalid=2458, Unknown=0, NotChecked=0, Total=3422 [2020-10-11 13:22:48,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-11 13:22:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 86. [2020-10-11 13:22:48,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-11 13:22:48,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 213 transitions. [2020-10-11 13:22:48,746 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 213 transitions. Word has length 33 [2020-10-11 13:22:48,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:22:48,746 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 213 transitions. [2020-10-11 13:22:48,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:22:48,746 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 213 transitions. [2020-10-11 13:22:48,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:22:48,746 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:22:48,746 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:22:48,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:48,947 INFO L429 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:22:48,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:22:48,948 INFO L82 PathProgramCache]: Analyzing trace with hash 895148688, now seen corresponding path program 339 times [2020-10-11 13:22:48,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:22:48,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682609097] [2020-10-11 13:22:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:22:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:49,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682609097] [2020-10-11 13:22:49,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662948833] [2020-10-11 13:22:49,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:49,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-11 13:22:49,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:22:49,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:22:49,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:49,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:49,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-11 13:22:49,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607269871] [2020-10-11 13:22:49,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:22:49,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:49,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:22:49,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:22:49,963 INFO L87 Difference]: Start difference. First operand 86 states and 213 transitions. Second operand 29 states. [2020-10-11 13:22:51,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:22:51,805 INFO L93 Difference]: Finished difference Result 169 states and 381 transitions. [2020-10-11 13:22:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:22:51,807 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-11 13:22:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:22:51,807 INFO L225 Difference]: With dead ends: 169 [2020-10-11 13:22:51,807 INFO L226 Difference]: Without dead ends: 163 [2020-10-11 13:22:51,808 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=978, Invalid=2562, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:22:51,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-11 13:22:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 89. [2020-10-11 13:22:51,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-11 13:22:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 221 transitions. [2020-10-11 13:22:51,809 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 221 transitions. Word has length 33 [2020-10-11 13:22:51,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:22:51,809 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 221 transitions. [2020-10-11 13:22:51,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:22:51,809 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 221 transitions. [2020-10-11 13:22:51,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:22:51,810 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:22:51,810 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:22:52,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:52,010 INFO L429 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:22:52,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:22:52,011 INFO L82 PathProgramCache]: Analyzing trace with hash -143619596, now seen corresponding path program 340 times [2020-10-11 13:22:52,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:22:52,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21081426] [2020-10-11 13:22:52,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:22:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:52,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21081426] [2020-10-11 13:22:52,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673247976] [2020-10-11 13:22:52,963 INFO L93 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 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:53,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:22:53,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:22:53,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:22:53,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:53,070 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:22:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:53,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:53,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-11 13:22:53,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264028594] [2020-10-11 13:22:53,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:22:53,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:53,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:22:53,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:22:53,102 INFO L87 Difference]: Start difference. First operand 89 states and 221 transitions. Second operand 30 states. [2020-10-11 13:22:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:22:55,173 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2020-10-11 13:22:55,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:22:55,175 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-11 13:22:55,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:22:55,176 INFO L225 Difference]: With dead ends: 166 [2020-10-11 13:22:55,176 INFO L226 Difference]: Without dead ends: 160 [2020-10-11 13:22:55,176 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=979, Invalid=2681, Unknown=0, NotChecked=0, Total=3660 [2020-10-11 13:22:55,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-11 13:22:55,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 88. [2020-10-11 13:22:55,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 13:22:55,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 219 transitions. [2020-10-11 13:22:55,178 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 219 transitions. Word has length 33 [2020-10-11 13:22:55,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:22:55,179 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 219 transitions. [2020-10-11 13:22:55,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:22:55,179 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 219 transitions. [2020-10-11 13:22:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:22:55,179 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:22:55,179 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:22:55,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2020-10-11 13:22:55,380 INFO L429 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:22:55,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:22:55,380 INFO L82 PathProgramCache]: Analyzing trace with hash 271163634, now seen corresponding path program 341 times [2020-10-11 13:22:55,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:22:55,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524901499] [2020-10-11 13:22:55,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:22:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:56,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524901499] [2020-10-11 13:22:56,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770076185] [2020-10-11 13:22:56,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:56,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-11 13:22:56,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:22:56,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:22:56,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:56,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:56,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-11 13:22:56,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044619834] [2020-10-11 13:22:56,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:22:56,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:56,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:22:56,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:22:56,412 INFO L87 Difference]: Start difference. First operand 88 states and 219 transitions. Second operand 29 states. [2020-10-11 13:22:58,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:22:58,418 INFO L93 Difference]: Finished difference Result 167 states and 379 transitions. [2020-10-11 13:22:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:22:58,420 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-11 13:22:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:22:58,420 INFO L225 Difference]: With dead ends: 167 [2020-10-11 13:22:58,421 INFO L226 Difference]: Without dead ends: 161 [2020-10-11 13:22:58,421 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1008, Invalid=2774, Unknown=0, NotChecked=0, Total=3782 [2020-10-11 13:22:58,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-11 13:22:58,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 91. [2020-10-11 13:22:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-11 13:22:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 227 transitions. [2020-10-11 13:22:58,423 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 227 transitions. Word has length 33 [2020-10-11 13:22:58,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:22:58,423 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 227 transitions. [2020-10-11 13:22:58,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:22:58,423 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 227 transitions. [2020-10-11 13:22:58,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:22:58,424 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:22:58,424 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:22:58,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2020-10-11 13:22:58,624 INFO L429 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:22:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:22:58,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1450585770, now seen corresponding path program 342 times [2020-10-11 13:22:58,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:22:58,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37437957] [2020-10-11 13:22:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:22:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:22:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:59,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37437957] [2020-10-11 13:22:59,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854934573] [2020-10-11 13:22:59,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:22:59,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-11 13:22:59,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:22:59,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:22:59,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:22:59,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:22:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:22:59,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:22:59,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-11 13:22:59,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199019120] [2020-10-11 13:22:59,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:22:59,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:22:59,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:22:59,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:22:59,697 INFO L87 Difference]: Start difference. First operand 91 states and 227 transitions. Second operand 30 states. [2020-10-11 13:23:01,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:23:01,894 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2020-10-11 13:23:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:23:01,897 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-11 13:23:01,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:23:01,897 INFO L225 Difference]: With dead ends: 164 [2020-10-11 13:23:01,897 INFO L226 Difference]: Without dead ends: 158 [2020-10-11 13:23:01,898 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1010, Invalid=2896, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 13:23:01,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-11 13:23:01,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-10-11 13:23:01,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-11 13:23:01,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 225 transitions. [2020-10-11 13:23:01,900 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 225 transitions. Word has length 33 [2020-10-11 13:23:01,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:23:01,900 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 225 transitions. [2020-10-11 13:23:01,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:23:01,900 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 225 transitions. [2020-10-11 13:23:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:23:01,901 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:23:01,901 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:23:02,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2020-10-11 13:23:02,102 INFO L429 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:23:02,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:23:02,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1660456916, now seen corresponding path program 343 times [2020-10-11 13:23:02,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:23:02,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536271026] [2020-10-11 13:23:02,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:23:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:02,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536271026] [2020-10-11 13:23:02,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708969993] [2020-10-11 13:23:02,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:03,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:23:03,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:23:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:03,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:23:03,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-11 13:23:03,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136747026] [2020-10-11 13:23:03,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:23:03,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:23:03,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:23:03,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:23:03,060 INFO L87 Difference]: Start difference. First operand 90 states and 225 transitions. Second operand 29 states. [2020-10-11 13:23:05,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:23:05,200 INFO L93 Difference]: Finished difference Result 165 states and 377 transitions. [2020-10-11 13:23:05,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:23:05,203 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-11 13:23:05,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:23:05,203 INFO L225 Difference]: With dead ends: 165 [2020-10-11 13:23:05,203 INFO L226 Difference]: Without dead ends: 159 [2020-10-11 13:23:05,204 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1054, Invalid=2978, Unknown=0, NotChecked=0, Total=4032 [2020-10-11 13:23:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-11 13:23:05,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2020-10-11 13:23:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:23:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-10-11 13:23:05,206 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 33 [2020-10-11 13:23:05,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:23:05,206 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-10-11 13:23:05,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:23:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-10-11 13:23:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:23:05,207 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:23:05,207 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:23:05,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2020-10-11 13:23:05,407 INFO L429 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:23:05,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:23:05,408 INFO L82 PathProgramCache]: Analyzing trace with hash 112298296, now seen corresponding path program 344 times [2020-10-11 13:23:05,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:23:05,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103311106] [2020-10-11 13:23:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:23:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:06,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103311106] [2020-10-11 13:23:06,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301599946] [2020-10-11 13:23:06,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:06,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:23:06,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:23:06,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:23:06,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:23:06,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:23:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:06,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:23:06,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-11 13:23:06,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088566523] [2020-10-11 13:23:06,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:23:06,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:23:06,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:23:06,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:23:06,427 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 30 states. [2020-10-11 13:23:08,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:23:08,851 INFO L93 Difference]: Finished difference Result 162 states and 371 transitions. [2020-10-11 13:23:08,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:23:08,854 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-11 13:23:08,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:23:08,854 INFO L225 Difference]: With dead ends: 162 [2020-10-11 13:23:08,855 INFO L226 Difference]: Without dead ends: 156 [2020-10-11 13:23:08,855 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2020-10-11 13:23:08,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-11 13:23:08,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 92. [2020-10-11 13:23:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:23:08,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 231 transitions. [2020-10-11 13:23:08,857 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 231 transitions. Word has length 33 [2020-10-11 13:23:08,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:23:08,857 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 231 transitions. [2020-10-11 13:23:08,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:23:08,857 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 231 transitions. [2020-10-11 13:23:08,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:23:08,857 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:23:08,858 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:23:09,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2020-10-11 13:23:09,058 INFO L429 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:23:09,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:23:09,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1189490890, now seen corresponding path program 345 times [2020-10-11 13:23:09,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:23:09,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60728950] [2020-10-11 13:23:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:23:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:09,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60728950] [2020-10-11 13:23:09,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871870486] [2020-10-11 13:23:09,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:09,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-11 13:23:09,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:23:09,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:23:09,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:23:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:10,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:23:10,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-11 13:23:10,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600602157] [2020-10-11 13:23:10,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:23:10,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:23:10,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:23:10,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:23:10,022 INFO L87 Difference]: Start difference. First operand 92 states and 231 transitions. Second operand 29 states. [2020-10-11 13:23:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:23:12,307 INFO L93 Difference]: Finished difference Result 163 states and 375 transitions. [2020-10-11 13:23:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 13:23:12,310 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-11 13:23:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:23:12,310 INFO L225 Difference]: With dead ends: 163 [2020-10-11 13:23:12,310 INFO L226 Difference]: Without dead ends: 157 [2020-10-11 13:23:12,311 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1116, Invalid=3174, Unknown=0, NotChecked=0, Total=4290 [2020-10-11 13:23:12,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-11 13:23:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-10-11 13:23:12,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-11 13:23:12,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 239 transitions. [2020-10-11 13:23:12,313 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 239 transitions. Word has length 33 [2020-10-11 13:23:12,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:23:12,313 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 239 transitions. [2020-10-11 13:23:12,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:23:12,313 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 239 transitions. [2020-10-11 13:23:12,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:23:12,313 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:23:12,313 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:23:12,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2020-10-11 13:23:12,514 INFO L429 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:23:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:23:12,514 INFO L82 PathProgramCache]: Analyzing trace with hash -2000039526, now seen corresponding path program 346 times [2020-10-11 13:23:12,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:23:12,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663480817] [2020-10-11 13:23:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:23:12,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:13,371 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:13,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663480817] [2020-10-11 13:23:13,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434356005] [2020-10-11 13:23:13,372 INFO L93 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 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:13,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:23:13,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:23:13,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:23:13,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:23:13,483 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:23:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:13,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:23:13,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-11 13:23:13,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996221008] [2020-10-11 13:23:13,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:23:13,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:23:13,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:23:13,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:23:13,519 INFO L87 Difference]: Start difference. First operand 95 states and 239 transitions. Second operand 30 states. [2020-10-11 13:23:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:23:16,097 INFO L93 Difference]: Finished difference Result 160 states and 369 transitions. [2020-10-11 13:23:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 13:23:16,099 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-11 13:23:16,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:23:16,100 INFO L225 Difference]: With dead ends: 160 [2020-10-11 13:23:16,100 INFO L226 Difference]: Without dead ends: 154 [2020-10-11 13:23:16,101 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1120, Invalid=3302, Unknown=0, NotChecked=0, Total=4422 [2020-10-11 13:23:16,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-11 13:23:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 94. [2020-10-11 13:23:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-11 13:23:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 237 transitions. [2020-10-11 13:23:16,103 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 237 transitions. Word has length 33 [2020-10-11 13:23:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:23:16,103 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 237 transitions. [2020-10-11 13:23:16,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:23:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 237 transitions. [2020-10-11 13:23:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:23:16,103 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:23:16,103 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:23:16,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:16,304 INFO L429 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:23:16,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:23:16,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1947762920, now seen corresponding path program 347 times [2020-10-11 13:23:16,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:23:16,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799334209] [2020-10-11 13:23:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:23:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:17,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799334209] [2020-10-11 13:23:17,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568066929] [2020-10-11 13:23:17,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:17,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-11 13:23:17,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:23:17,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:23:17,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:23:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:17,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:23:17,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-11 13:23:17,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704034248] [2020-10-11 13:23:17,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:23:17,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:23:17,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:23:17,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:23:17,401 INFO L87 Difference]: Start difference. First operand 94 states and 237 transitions. Second operand 29 states. [2020-10-11 13:23:19,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:23:19,837 INFO L93 Difference]: Finished difference Result 161 states and 373 transitions. [2020-10-11 13:23:19,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 13:23:19,839 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-11 13:23:19,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:23:19,840 INFO L225 Difference]: With dead ends: 161 [2020-10-11 13:23:19,840 INFO L226 Difference]: Without dead ends: 155 [2020-10-11 13:23:19,841 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2020-10-11 13:23:19,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-11 13:23:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 97. [2020-10-11 13:23:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-11 13:23:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 245 transitions. [2020-10-11 13:23:19,843 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 245 transitions. Word has length 33 [2020-10-11 13:23:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:23:19,843 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 245 transitions. [2020-10-11 13:23:19,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:23:19,843 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 245 transitions. [2020-10-11 13:23:19,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:23:19,843 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:23:19,843 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:23:20,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2020-10-11 13:23:20,044 INFO L429 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:23:20,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:23:20,044 INFO L82 PathProgramCache]: Analyzing trace with hash -71513476, now seen corresponding path program 348 times [2020-10-11 13:23:20,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:23:20,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171603899] [2020-10-11 13:23:20,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:23:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:20,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171603899] [2020-10-11 13:23:20,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086226627] [2020-10-11 13:23:20,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:20,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-11 13:23:20,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:23:20,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:23:20,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:23:21,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:23:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:21,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:23:21,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-11 13:23:21,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615421988] [2020-10-11 13:23:21,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:23:21,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:23:21,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:23:21,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:23:21,031 INFO L87 Difference]: Start difference. First operand 97 states and 245 transitions. Second operand 30 states. [2020-10-11 13:23:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:23:23,852 INFO L93 Difference]: Finished difference Result 158 states and 367 transitions. [2020-10-11 13:23:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-11 13:23:23,855 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-11 13:23:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:23:23,855 INFO L225 Difference]: With dead ends: 158 [2020-10-11 13:23:23,855 INFO L226 Difference]: Without dead ends: 152 [2020-10-11 13:23:23,856 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1199, Invalid=3493, Unknown=0, NotChecked=0, Total=4692 [2020-10-11 13:23:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-11 13:23:23,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 96. [2020-10-11 13:23:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-11 13:23:23,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 243 transitions. [2020-10-11 13:23:23,858 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 243 transitions. Word has length 33 [2020-10-11 13:23:23,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:23:23,858 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 243 transitions. [2020-10-11 13:23:23,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:23:23,858 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 243 transitions. [2020-10-11 13:23:23,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:23:23,859 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:23:23,859 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:23:24,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2020-10-11 13:23:24,060 INFO L429 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:23:24,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:23:24,060 INFO L82 PathProgramCache]: Analyzing trace with hash 616808314, now seen corresponding path program 349 times [2020-10-11 13:23:24,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:23:24,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101553880] [2020-10-11 13:23:24,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:23:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:24,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101553880] [2020-10-11 13:23:24,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399226235] [2020-10-11 13:23:24,889 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:24,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:23:24,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:23:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:24,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:23:24,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-11 13:23:24,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798947187] [2020-10-11 13:23:24,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:23:24,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:23:24,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:23:24,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:23:24,991 INFO L87 Difference]: Start difference. First operand 96 states and 243 transitions. Second operand 29 states. [2020-10-11 13:23:27,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:23:27,595 INFO L93 Difference]: Finished difference Result 159 states and 371 transitions. [2020-10-11 13:23:27,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-11 13:23:27,597 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-11 13:23:27,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:23:27,598 INFO L225 Difference]: With dead ends: 159 [2020-10-11 13:23:27,598 INFO L226 Difference]: Without dead ends: 153 [2020-10-11 13:23:27,598 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1288, Invalid=3542, Unknown=0, NotChecked=0, Total=4830 [2020-10-11 13:23:27,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-11 13:23:27,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 99. [2020-10-11 13:23:27,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 13:23:27,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 251 transitions. [2020-10-11 13:23:27,600 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 251 transitions. Word has length 33 [2020-10-11 13:23:27,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:23:27,600 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 251 transitions. [2020-10-11 13:23:27,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:23:27,601 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 251 transitions. [2020-10-11 13:23:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:23:27,601 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:23:27,601 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:23:27,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:27,802 INFO L429 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:23:27,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:23:27,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1601999838, now seen corresponding path program 350 times [2020-10-11 13:23:27,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:23:27,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640906427] [2020-10-11 13:23:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:23:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:28,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640906427] [2020-10-11 13:23:28,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863400142] [2020-10-11 13:23:28,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:28,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:23:28,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:23:28,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:23:28,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:23:28,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:23:28,790 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:28,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:23:28,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-11 13:23:28,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741458688] [2020-10-11 13:23:28,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:23:28,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:23:28,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:23:28,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:23:28,791 INFO L87 Difference]: Start difference. First operand 99 states and 251 transitions. Second operand 30 states. [2020-10-11 13:23:31,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:23:31,863 INFO L93 Difference]: Finished difference Result 156 states and 365 transitions. [2020-10-11 13:23:31,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-11 13:23:31,866 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-11 13:23:31,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:23:31,866 INFO L225 Difference]: With dead ends: 156 [2020-10-11 13:23:31,866 INFO L226 Difference]: Without dead ends: 150 [2020-10-11 13:23:31,867 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1294, Invalid=3676, Unknown=0, NotChecked=0, Total=4970 [2020-10-11 13:23:31,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-11 13:23:31,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 98. [2020-10-11 13:23:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 13:23:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 249 transitions. [2020-10-11 13:23:31,868 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 249 transitions. Word has length 33 [2020-10-11 13:23:31,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:23:31,869 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 249 transitions. [2020-10-11 13:23:31,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:23:31,869 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 249 transitions. [2020-10-11 13:23:31,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:23:31,869 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:23:31,869 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:23:32,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:32,070 INFO L429 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:23:32,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:23:32,070 INFO L82 PathProgramCache]: Analyzing trace with hash -15159204, now seen corresponding path program 351 times [2020-10-11 13:23:32,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:23:32,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699602212] [2020-10-11 13:23:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:23:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:32,896 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:32,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699602212] [2020-10-11 13:23:32,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227658018] [2020-10-11 13:23:32,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:32,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-11 13:23:32,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:23:32,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:23:32,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:23:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:33,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:23:33,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-11 13:23:33,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155340002] [2020-10-11 13:23:33,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:23:33,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:23:33,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:23:33,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:23:33,004 INFO L87 Difference]: Start difference. First operand 98 states and 249 transitions. Second operand 29 states. [2020-10-11 13:23:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:23:35,778 INFO L93 Difference]: Finished difference Result 157 states and 369 transitions. [2020-10-11 13:23:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-11 13:23:35,780 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-11 13:23:35,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:23:35,781 INFO L225 Difference]: With dead ends: 157 [2020-10-11 13:23:35,781 INFO L226 Difference]: Without dead ends: 151 [2020-10-11 13:23:35,781 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1398, Invalid=3714, Unknown=0, NotChecked=0, Total=5112 [2020-10-11 13:23:35,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-11 13:23:35,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 101. [2020-10-11 13:23:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-11 13:23:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 257 transitions. [2020-10-11 13:23:35,783 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 257 transitions. Word has length 33 [2020-10-11 13:23:35,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:23:35,783 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 257 transitions. [2020-10-11 13:23:35,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:23:35,783 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 257 transitions. [2020-10-11 13:23:35,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:23:35,783 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:23:35,783 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:23:35,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:35,984 INFO L429 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:23:35,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:23:35,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1241730496, now seen corresponding path program 352 times [2020-10-11 13:23:35,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:23:35,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744924578] [2020-10-11 13:23:35,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:23:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:36,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744924578] [2020-10-11 13:23:36,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923728438] [2020-10-11 13:23:36,815 INFO L93 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 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:36,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:23:36,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:23:36,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:23:36,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:23:36,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:23:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:36,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:23:36,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-11 13:23:36,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492738566] [2020-10-11 13:23:36,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:23:36,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:23:36,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:23:36,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:23:36,967 INFO L87 Difference]: Start difference. First operand 101 states and 257 transitions. Second operand 30 states. [2020-10-11 13:23:40,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:23:40,241 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-10-11 13:23:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-11 13:23:40,243 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-11 13:23:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:23:40,243 INFO L225 Difference]: With dead ends: 154 [2020-10-11 13:23:40,243 INFO L226 Difference]: Without dead ends: 148 [2020-10-11 13:23:40,244 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1405, Invalid=3851, Unknown=0, NotChecked=0, Total=5256 [2020-10-11 13:23:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-11 13:23:40,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 100. [2020-10-11 13:23:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-11 13:23:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 255 transitions. [2020-10-11 13:23:40,246 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 255 transitions. Word has length 33 [2020-10-11 13:23:40,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:23:40,246 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 255 transitions. [2020-10-11 13:23:40,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:23:40,246 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 255 transitions. [2020-10-11 13:23:40,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:23:40,247 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:23:40,247 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:23:40,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2020-10-11 13:23:40,447 INFO L429 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:23:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:23:40,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1437044290, now seen corresponding path program 353 times [2020-10-11 13:23:40,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:23:40,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818030631] [2020-10-11 13:23:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:23:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:41,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818030631] [2020-10-11 13:23:41,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805785037] [2020-10-11 13:23:41,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:41,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-11 13:23:41,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:23:41,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:23:41,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:23:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:41,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:23:41,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-11 13:23:41,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743810564] [2020-10-11 13:23:41,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:23:41,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:23:41,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:23:41,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:23:41,386 INFO L87 Difference]: Start difference. First operand 100 states and 255 transitions. Second operand 29 states. [2020-10-11 13:23:44,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:23:44,456 INFO L93 Difference]: Finished difference Result 155 states and 367 transitions. [2020-10-11 13:23:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-11 13:23:44,459 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-11 13:23:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:23:44,459 INFO L225 Difference]: With dead ends: 155 [2020-10-11 13:23:44,459 INFO L226 Difference]: Without dead ends: 149 [2020-10-11 13:23:44,460 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1524, Invalid=3878, Unknown=0, NotChecked=0, Total=5402 [2020-10-11 13:23:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-11 13:23:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2020-10-11 13:23:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-11 13:23:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 263 transitions. [2020-10-11 13:23:44,462 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 263 transitions. Word has length 33 [2020-10-11 13:23:44,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:23:44,462 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 263 transitions. [2020-10-11 13:23:44,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:23:44,463 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 263 transitions. [2020-10-11 13:23:44,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:23:44,463 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:23:44,463 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:23:44,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2020-10-11 13:23:44,664 INFO L429 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:23:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:23:44,664 INFO L82 PathProgramCache]: Analyzing trace with hash -917301214, now seen corresponding path program 354 times [2020-10-11 13:23:44,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:23:44,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216504743] [2020-10-11 13:23:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:23:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:45,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216504743] [2020-10-11 13:23:45,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588001908] [2020-10-11 13:23:45,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:45,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-11 13:23:45,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:23:45,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:23:45,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:23:45,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:23:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:45,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:23:45,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-11 13:23:45,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321062329] [2020-10-11 13:23:45,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:23:45,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:23:45,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:23:45,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:23:45,671 INFO L87 Difference]: Start difference. First operand 103 states and 263 transitions. Second operand 30 states. [2020-10-11 13:23:49,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:23:49,132 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-10-11 13:23:49,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-11 13:23:49,134 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-11 13:23:49,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:23:49,135 INFO L225 Difference]: With dead ends: 152 [2020-10-11 13:23:49,135 INFO L226 Difference]: Without dead ends: 146 [2020-10-11 13:23:49,135 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1532, Invalid=4018, Unknown=0, NotChecked=0, Total=5550 [2020-10-11 13:23:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-11 13:23:49,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 102. [2020-10-11 13:23:49,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-11 13:23:49,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 261 transitions. [2020-10-11 13:23:49,137 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 261 transitions. Word has length 33 [2020-10-11 13:23:49,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:23:49,138 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 261 transitions. [2020-10-11 13:23:49,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:23:49,138 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 261 transitions. [2020-10-11 13:23:49,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:23:49,138 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:23:49,138 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:23:49,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:49,339 INFO L429 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:23:49,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:23:49,339 INFO L82 PathProgramCache]: Analyzing trace with hash 738010016, now seen corresponding path program 355 times [2020-10-11 13:23:49,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:23:49,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708423204] [2020-10-11 13:23:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:23:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:50,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708423204] [2020-10-11 13:23:50,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896343502] [2020-10-11 13:23:50,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:50,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:23:50,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:23:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:50,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:23:50,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-11 13:23:50,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857105809] [2020-10-11 13:23:50,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:23:50,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:23:50,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:23:50,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:23:50,260 INFO L87 Difference]: Start difference. First operand 102 states and 261 transitions. Second operand 29 states. [2020-10-11 13:23:53,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:23:53,385 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-10-11 13:23:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-11 13:23:53,387 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-11 13:23:53,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:23:53,388 INFO L225 Difference]: With dead ends: 153 [2020-10-11 13:23:53,388 INFO L226 Difference]: Without dead ends: 147 [2020-10-11 13:23:53,389 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1666, Invalid=4034, Unknown=0, NotChecked=0, Total=5700 [2020-10-11 13:23:53,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-11 13:23:53,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2020-10-11 13:23:53,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-11 13:23:53,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-10-11 13:23:53,391 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 33 [2020-10-11 13:23:53,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:23:53,392 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-10-11 13:23:53,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:23:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-10-11 13:23:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:23:53,392 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:23:53,392 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:23:53,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2020-10-11 13:23:53,593 INFO L429 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:23:53,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:23:53,594 INFO L82 PathProgramCache]: Analyzing trace with hash -982117628, now seen corresponding path program 356 times [2020-10-11 13:23:53,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:23:53,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627224409] [2020-10-11 13:23:53,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:23:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:54,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627224409] [2020-10-11 13:23:54,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264271452] [2020-10-11 13:23:54,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:54,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:23:54,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:23:54,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:23:54,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:23:54,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:23:54,592 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:54,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:23:54,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-11 13:23:54,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253156147] [2020-10-11 13:23:54,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:23:54,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:23:54,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:23:54,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:23:54,593 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 30 states. [2020-10-11 13:23:58,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:23:58,291 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-10-11 13:23:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-11 13:23:58,294 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-11 13:23:58,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:23:58,294 INFO L225 Difference]: With dead ends: 150 [2020-10-11 13:23:58,294 INFO L226 Difference]: Without dead ends: 144 [2020-10-11 13:23:58,295 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1675, Invalid=4177, Unknown=0, NotChecked=0, Total=5852 [2020-10-11 13:23:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-11 13:23:58,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 104. [2020-10-11 13:23:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-11 13:23:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-10-11 13:23:58,297 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 33 [2020-10-11 13:23:58,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:23:58,297 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-10-11 13:23:58,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:23:58,297 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-10-11 13:23:58,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:23:58,298 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:23:58,298 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:23:58,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:58,499 INFO L429 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:23:58,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:23:58,499 INFO L82 PathProgramCache]: Analyzing trace with hash -511121918, now seen corresponding path program 357 times [2020-10-11 13:23:58,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:23:58,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817903237] [2020-10-11 13:23:58,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:23:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:23:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:59,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817903237] [2020-10-11 13:23:59,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337819986] [2020-10-11 13:23:59,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:23:59,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-11 13:23:59,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:23:59,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:23:59,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:23:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:23:59,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:23:59,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-11 13:23:59,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272054043] [2020-10-11 13:23:59,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:23:59,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:23:59,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:23:59,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:23:59,437 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 29 states. [2020-10-11 13:24:02,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:24:02,713 INFO L93 Difference]: Finished difference Result 151 states and 363 transitions. [2020-10-11 13:24:02,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-11 13:24:02,716 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-11 13:24:02,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:24:02,717 INFO L225 Difference]: With dead ends: 151 [2020-10-11 13:24:02,717 INFO L226 Difference]: Without dead ends: 145 [2020-10-11 13:24:02,717 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1824, Invalid=4182, Unknown=0, NotChecked=0, Total=6006 [2020-10-11 13:24:02,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-11 13:24:02,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2020-10-11 13:24:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-11 13:24:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 275 transitions. [2020-10-11 13:24:02,725 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 275 transitions. Word has length 33 [2020-10-11 13:24:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:24:02,725 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 275 transitions. [2020-10-11 13:24:02,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:24:02,725 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 275 transitions. [2020-10-11 13:24:02,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:24:02,725 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:24:02,725 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:24:02,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2020-10-11 13:24:02,926 INFO L429 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:24:02,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:24:02,926 INFO L82 PathProgramCache]: Analyzing trace with hash -495034778, now seen corresponding path program 358 times [2020-10-11 13:24:02,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:24:02,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881123847] [2020-10-11 13:24:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:24:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:24:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:03,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881123847] [2020-10-11 13:24:03,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604821966] [2020-10-11 13:24:03,739 INFO L93 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 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:03,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:24:03,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:24:03,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:24:03,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:24:03,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:24:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:03,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:24:03,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-11 13:24:03,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74671469] [2020-10-11 13:24:03,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:24:03,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:24:03,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:24:03,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:24:03,906 INFO L87 Difference]: Start difference. First operand 107 states and 275 transitions. Second operand 30 states. [2020-10-11 13:24:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:24:07,889 INFO L93 Difference]: Finished difference Result 148 states and 357 transitions. [2020-10-11 13:24:07,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-11 13:24:07,892 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-11 13:24:07,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:24:07,893 INFO L225 Difference]: With dead ends: 148 [2020-10-11 13:24:07,893 INFO L226 Difference]: Without dead ends: 142 [2020-10-11 13:24:07,894 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1834, Invalid=4328, Unknown=0, NotChecked=0, Total=6162 [2020-10-11 13:24:07,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-11 13:24:07,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 106. [2020-10-11 13:24:07,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-11 13:24:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-10-11 13:24:07,896 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 33 [2020-10-11 13:24:07,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:24:07,896 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-10-11 13:24:07,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:24:07,896 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-10-11 13:24:07,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:24:07,896 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:24:07,896 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:24:08,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:08,097 INFO L429 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:24:08,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:24:08,097 INFO L82 PathProgramCache]: Analyzing trace with hash -494544668, now seen corresponding path program 359 times [2020-10-11 13:24:08,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:24:08,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971113860] [2020-10-11 13:24:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:24:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:24:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:08,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971113860] [2020-10-11 13:24:08,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797436688] [2020-10-11 13:24:08,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:08,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-11 13:24:08,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:24:08,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:24:08,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:24:09,059 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:09,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:24:09,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-10-11 13:24:09,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649550305] [2020-10-11 13:24:09,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-11 13:24:09,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:24:09,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-11 13:24:09,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-10-11 13:24:09,061 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 29 states. [2020-10-11 13:24:12,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:24:12,481 INFO L93 Difference]: Finished difference Result 168 states and 407 transitions. [2020-10-11 13:24:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-11 13:24:12,484 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-10-11 13:24:12,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:24:12,485 INFO L225 Difference]: With dead ends: 168 [2020-10-11 13:24:12,485 INFO L226 Difference]: Without dead ends: 162 [2020-10-11 13:24:12,486 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1998, Invalid=4322, Unknown=0, NotChecked=0, Total=6320 [2020-10-11 13:24:12,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-11 13:24:12,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 112. [2020-10-11 13:24:12,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-11 13:24:12,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 293 transitions. [2020-10-11 13:24:12,487 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 293 transitions. Word has length 33 [2020-10-11 13:24:12,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:24:12,488 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 293 transitions. [2020-10-11 13:24:12,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-11 13:24:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 293 transitions. [2020-10-11 13:24:12,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-11 13:24:12,488 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:24:12,488 INFO L421 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:24:12,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:12,689 INFO L429 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:24:12,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:24:12,689 INFO L82 PathProgramCache]: Analyzing trace with hash -494527928, now seen corresponding path program 360 times [2020-10-11 13:24:12,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:24:12,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401848402] [2020-10-11 13:24:12,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:24:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:24:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:13,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401848402] [2020-10-11 13:24:13,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207414606] [2020-10-11 13:24:13,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:13,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-11 13:24:13,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:24:13,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-10-11 13:24:13,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:24:13,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:24:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:13,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:24:13,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-10-11 13:24:13,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747743610] [2020-10-11 13:24:13,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:24:13,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:24:13,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:24:13,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:24:13,699 INFO L87 Difference]: Start difference. First operand 112 states and 293 transitions. Second operand 30 states. [2020-10-11 13:24:17,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:24:17,659 INFO L93 Difference]: Finished difference Result 149 states and 363 transitions. [2020-10-11 13:24:17,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-11 13:24:17,662 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-10-11 13:24:17,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:24:17,662 INFO L225 Difference]: With dead ends: 149 [2020-10-11 13:24:17,662 INFO L226 Difference]: Without dead ends: 141 [2020-10-11 13:24:17,663 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2009, Invalid=4471, Unknown=0, NotChecked=0, Total=6480 [2020-10-11 13:24:17,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-11 13:24:17,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 109. [2020-10-11 13:24:17,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-11 13:24:17,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-10-11 13:24:17,665 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-10-11 13:24:17,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:24:17,665 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-10-11 13:24:17,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:24:17,666 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-10-11 13:24:17,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:24:17,666 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:24:17,666 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:24:17,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:17,867 INFO L429 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:24:17,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:24:17,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1551441143, now seen corresponding path program 361 times [2020-10-11 13:24:17,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:24:17,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397524800] [2020-10-11 13:24:17,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:24:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:24:19,032 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:19,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397524800] [2020-10-11 13:24:19,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848205362] [2020-10-11 13:24:19,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:24:19,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:24:19,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:24:19,114 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:19,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:24:19,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-11 13:24:19,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000087197] [2020-10-11 13:24:19,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:24:19,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:24:19,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:24:19,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:24:19,115 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 30 states. [2020-10-11 13:24:20,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:24:20,912 INFO L93 Difference]: Finished difference Result 174 states and 411 transitions. [2020-10-11 13:24:20,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:24:20,915 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-11 13:24:20,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:24:20,915 INFO L225 Difference]: With dead ends: 174 [2020-10-11 13:24:20,916 INFO L226 Difference]: Without dead ends: 168 [2020-10-11 13:24:20,916 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=975, Invalid=2217, Unknown=0, NotChecked=0, Total=3192 [2020-10-11 13:24:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-11 13:24:20,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 111. [2020-10-11 13:24:20,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-11 13:24:20,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-11 13:24:20,918 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-11 13:24:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:24:20,918 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-11 13:24:20,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:24:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-11 13:24:20,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:24:20,919 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:24:20,919 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:24:21,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2020-10-11 13:24:21,119 INFO L429 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:24:21,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:24:21,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1122267739, now seen corresponding path program 362 times [2020-10-11 13:24:21,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:24:21,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250355231] [2020-10-11 13:24:21,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:24:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:24:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:22,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250355231] [2020-10-11 13:24:22,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079558151] [2020-10-11 13:24:22,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:22,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:24:22,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:24:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:24:22,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:24:22,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:24:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:22,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:24:22,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-11 13:24:22,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727996950] [2020-10-11 13:24:22,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:24:22,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:24:22,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:24:22,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:24:22,433 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-11 13:24:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:24:24,463 INFO L93 Difference]: Finished difference Result 171 states and 405 transitions. [2020-10-11 13:24:24,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:24:24,465 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-11 13:24:24,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:24:24,466 INFO L225 Difference]: With dead ends: 171 [2020-10-11 13:24:24,466 INFO L226 Difference]: Without dead ends: 165 [2020-10-11 13:24:24,467 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1034, Invalid=2506, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:24:24,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-11 13:24:24,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 110. [2020-10-11 13:24:24,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 13:24:24,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-11 13:24:24,469 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-11 13:24:24,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:24:24,469 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-11 13:24:24,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:24:24,469 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-11 13:24:24,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:24:24,469 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:24:24,469 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:24:24,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:24,670 INFO L429 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:24:24,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:24:24,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1692542375, now seen corresponding path program 363 times [2020-10-11 13:24:24,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:24:24,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143858844] [2020-10-11 13:24:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:24:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:24:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:25,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143858844] [2020-10-11 13:24:25,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281572230] [2020-10-11 13:24:25,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:25,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-11 13:24:25,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:24:25,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:24:25,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:24:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:25,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:24:25,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-11 13:24:25,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672117931] [2020-10-11 13:24:25,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:24:25,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:24:25,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:24:25,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:24:25,861 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-11 13:24:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:24:27,913 INFO L93 Difference]: Finished difference Result 168 states and 399 transitions. [2020-10-11 13:24:27,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-11 13:24:27,916 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-11 13:24:27,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:24:27,916 INFO L225 Difference]: With dead ends: 168 [2020-10-11 13:24:27,916 INFO L226 Difference]: Without dead ends: 162 [2020-10-11 13:24:27,917 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-10-11 13:24:27,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-11 13:24:27,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 111. [2020-10-11 13:24:27,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-11 13:24:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-11 13:24:27,919 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-11 13:24:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:24:27,919 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-11 13:24:27,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:24:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-11 13:24:27,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:24:27,919 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:24:27,919 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:24:28,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2020-10-11 13:24:28,120 INFO L429 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:24:28,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:24:28,120 INFO L82 PathProgramCache]: Analyzing trace with hash 778516669, now seen corresponding path program 364 times [2020-10-11 13:24:28,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:24:28,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103112677] [2020-10-11 13:24:28,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:24:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:24:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:29,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103112677] [2020-10-11 13:24:29,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753813057] [2020-10-11 13:24:29,260 INFO L93 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 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:29,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:24:29,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:24:29,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:24:29,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:24:29,380 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:24:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:29,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:24:29,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-11 13:24:29,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386502673] [2020-10-11 13:24:29,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:24:29,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:24:29,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:24:29,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:24:29,405 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-11 13:24:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:24:31,717 INFO L93 Difference]: Finished difference Result 167 states and 397 transitions. [2020-10-11 13:24:31,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:24:31,719 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-11 13:24:31,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:24:31,719 INFO L225 Difference]: With dead ends: 167 [2020-10-11 13:24:31,720 INFO L226 Difference]: Without dead ends: 161 [2020-10-11 13:24:31,720 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1040, Invalid=2742, Unknown=0, NotChecked=0, Total=3782 [2020-10-11 13:24:31,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-11 13:24:31,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2020-10-11 13:24:31,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 13:24:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-11 13:24:31,722 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-11 13:24:31,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:24:31,722 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-11 13:24:31,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:24:31,723 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-11 13:24:31,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:24:31,723 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:24:31,723 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:24:31,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:31,924 INFO L429 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:24:31,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:24:31,924 INFO L82 PathProgramCache]: Analyzing trace with hash -46757829, now seen corresponding path program 365 times [2020-10-11 13:24:31,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:24:31,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115535449] [2020-10-11 13:24:31,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:24:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:24:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:33,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115535449] [2020-10-11 13:24:33,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852544662] [2020-10-11 13:24:33,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:33,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-11 13:24:33,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:24:33,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:24:33,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:24:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:33,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:24:33,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-11 13:24:33,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459926360] [2020-10-11 13:24:33,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:24:33,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:24:33,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:24:33,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:24:33,167 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-11 13:24:35,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:24:35,415 INFO L93 Difference]: Finished difference Result 164 states and 391 transitions. [2020-10-11 13:24:35,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:24:35,418 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-11 13:24:35,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:24:35,418 INFO L225 Difference]: With dead ends: 164 [2020-10-11 13:24:35,419 INFO L226 Difference]: Without dead ends: 158 [2020-10-11 13:24:35,419 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=989, Invalid=2671, Unknown=0, NotChecked=0, Total=3660 [2020-10-11 13:24:35,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-11 13:24:35,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 111. [2020-10-11 13:24:35,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-11 13:24:35,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-11 13:24:35,421 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-11 13:24:35,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:24:35,421 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-11 13:24:35,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:24:35,421 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-11 13:24:35,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:24:35,421 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:24:35,422 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:24:35,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2020-10-11 13:24:35,622 INFO L429 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:24:35,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:24:35,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1085526113, now seen corresponding path program 366 times [2020-10-11 13:24:35,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:24:35,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180571658] [2020-10-11 13:24:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:24:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:24:36,730 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:36,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180571658] [2020-10-11 13:24:36,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920839687] [2020-10-11 13:24:36,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:36,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-11 13:24:36,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:24:36,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:24:36,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:24:36,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:24:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:36,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:24:36,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-11 13:24:36,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953821138] [2020-10-11 13:24:36,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:24:36,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:24:36,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:24:36,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:24:36,887 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-11 13:24:39,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:24:39,446 INFO L93 Difference]: Finished difference Result 163 states and 389 transitions. [2020-10-11 13:24:39,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:24:39,449 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-11 13:24:39,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:24:39,449 INFO L225 Difference]: With dead ends: 163 [2020-10-11 13:24:39,449 INFO L226 Difference]: Without dead ends: 157 [2020-10-11 13:24:39,450 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1062, Invalid=2970, Unknown=0, NotChecked=0, Total=4032 [2020-10-11 13:24:39,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-11 13:24:39,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2020-10-11 13:24:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 13:24:39,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-11 13:24:39,452 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-11 13:24:39,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:24:39,452 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-11 13:24:39,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:24:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-11 13:24:39,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:24:39,452 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:24:39,453 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:24:39,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2020-10-11 13:24:39,653 INFO L429 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:24:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:24:39,654 INFO L82 PathProgramCache]: Analyzing trace with hash -670742883, now seen corresponding path program 367 times [2020-10-11 13:24:39,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:24:39,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101336447] [2020-10-11 13:24:39,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:24:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:24:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:40,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101336447] [2020-10-11 13:24:40,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274272031] [2020-10-11 13:24:40,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:24:40,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:24:40,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:24:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:40,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:24:40,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-11 13:24:40,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178729089] [2020-10-11 13:24:40,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:24:40,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:24:40,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:24:40,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:24:40,786 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-11 13:24:43,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:24:43,196 INFO L93 Difference]: Finished difference Result 160 states and 383 transitions. [2020-10-11 13:24:43,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:24:43,199 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-11 13:24:43,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:24:43,199 INFO L225 Difference]: With dead ends: 160 [2020-10-11 13:24:43,200 INFO L226 Difference]: Without dead ends: 154 [2020-10-11 13:24:43,200 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1020, Invalid=2886, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 13:24:43,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-11 13:24:43,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 111. [2020-10-11 13:24:43,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-11 13:24:43,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-11 13:24:43,202 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-11 13:24:43,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:24:43,202 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-11 13:24:43,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:24:43,202 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-11 13:24:43,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:24:43,202 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:24:43,202 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:24:43,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:43,403 INFO L429 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:24:43,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:24:43,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1902475009, now seen corresponding path program 368 times [2020-10-11 13:24:43,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:24:43,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617828026] [2020-10-11 13:24:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:24:43,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:24:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:44,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617828026] [2020-10-11 13:24:44,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334047697] [2020-10-11 13:24:44,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:44,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:24:44,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:24:44,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:24:44,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:24:44,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:24:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:44,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:24:44,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-11 13:24:44,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911430565] [2020-10-11 13:24:44,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:24:44,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:24:44,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:24:44,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:24:44,616 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-11 13:24:47,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:24:47,425 INFO L93 Difference]: Finished difference Result 159 states and 381 transitions. [2020-10-11 13:24:47,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:24:47,427 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-11 13:24:47,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:24:47,428 INFO L225 Difference]: With dead ends: 159 [2020-10-11 13:24:47,428 INFO L226 Difference]: Without dead ends: 153 [2020-10-11 13:24:47,428 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1100, Invalid=3190, Unknown=0, NotChecked=0, Total=4290 [2020-10-11 13:24:47,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-11 13:24:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 110. [2020-10-11 13:24:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 13:24:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-11 13:24:47,431 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-11 13:24:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:24:47,431 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-11 13:24:47,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:24:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-11 13:24:47,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:24:47,431 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:24:47,431 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:24:47,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2020-10-11 13:24:47,632 INFO L429 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:24:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:24:47,633 INFO L82 PathProgramCache]: Analyzing trace with hash 718550399, now seen corresponding path program 369 times [2020-10-11 13:24:47,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:24:47,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318820215] [2020-10-11 13:24:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:24:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:24:48,658 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:48,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318820215] [2020-10-11 13:24:48,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755237441] [2020-10-11 13:24:48,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:48,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-11 13:24:48,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:24:48,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:24:48,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:24:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:48,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:24:48,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-11 13:24:48,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215611649] [2020-10-11 13:24:48,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:24:48,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:24:48,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:24:48,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:24:48,760 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-11 13:24:51,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:24:51,321 INFO L93 Difference]: Finished difference Result 156 states and 375 transitions. [2020-10-11 13:24:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:24:51,323 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-11 13:24:51,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:24:51,324 INFO L225 Difference]: With dead ends: 156 [2020-10-11 13:24:51,324 INFO L226 Difference]: Without dead ends: 150 [2020-10-11 13:24:51,325 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1067, Invalid=3093, Unknown=0, NotChecked=0, Total=4160 [2020-10-11 13:24:51,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-11 13:24:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 111. [2020-10-11 13:24:51,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-11 13:24:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-11 13:24:51,327 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-11 13:24:51,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:24:51,327 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-11 13:24:51,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:24:51,327 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-11 13:24:51,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:24:51,328 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:24:51,328 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:24:51,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:51,528 INFO L429 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:24:51,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:24:51,529 INFO L82 PathProgramCache]: Analyzing trace with hash -829608221, now seen corresponding path program 370 times [2020-10-11 13:24:51,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:24:51,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630168264] [2020-10-11 13:24:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:24:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:24:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:52,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630168264] [2020-10-11 13:24:52,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441042783] [2020-10-11 13:24:52,559 INFO L93 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 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:52,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:24:52,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:24:52,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:24:52,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:24:52,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:24:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:52,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:24:52,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-11 13:24:52,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342477881] [2020-10-11 13:24:52,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:24:52,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:24:52,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:24:52,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:24:52,708 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-11 13:24:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:24:55,714 INFO L93 Difference]: Finished difference Result 155 states and 373 transitions. [2020-10-11 13:24:55,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 13:24:55,717 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-11 13:24:55,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:24:55,718 INFO L225 Difference]: With dead ends: 155 [2020-10-11 13:24:55,718 INFO L226 Difference]: Without dead ends: 149 [2020-10-11 13:24:55,718 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1154, Invalid=3402, Unknown=0, NotChecked=0, Total=4556 [2020-10-11 13:24:55,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-11 13:24:55,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 110. [2020-10-11 13:24:55,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 13:24:55,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-11 13:24:55,720 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-11 13:24:55,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:24:55,720 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-11 13:24:55,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:24:55,720 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-11 13:24:55,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:24:55,721 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:24:55,721 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:24:55,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:55,921 INFO L429 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:24:55,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:24:55,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2131397407, now seen corresponding path program 371 times [2020-10-11 13:24:55,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:24:55,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840418274] [2020-10-11 13:24:55,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:24:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:24:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:56,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840418274] [2020-10-11 13:24:56,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343290166] [2020-10-11 13:24:56,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:24:56,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-11 13:24:56,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:24:56,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:24:56,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:24:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:24:57,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:24:57,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-11 13:24:57,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043821939] [2020-10-11 13:24:57,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:24:57,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:24:57,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:24:57,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:24:57,017 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-11 13:24:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:24:59,821 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-10-11 13:24:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 13:24:59,824 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-11 13:24:59,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:24:59,824 INFO L225 Difference]: With dead ends: 152 [2020-10-11 13:24:59,824 INFO L226 Difference]: Without dead ends: 146 [2020-10-11 13:24:59,825 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1130, Invalid=3292, Unknown=0, NotChecked=0, Total=4422 [2020-10-11 13:24:59,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-11 13:24:59,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 111. [2020-10-11 13:24:59,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-11 13:24:59,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-11 13:24:59,827 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-11 13:24:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:24:59,827 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-11 13:24:59,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:24:59,828 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-11 13:24:59,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:24:59,828 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:24:59,828 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:25:00,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:00,029 INFO L429 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:25:00,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:25:00,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1353021253, now seen corresponding path program 372 times [2020-10-11 13:25:00,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:25:00,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094403644] [2020-10-11 13:25:00,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:25:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:25:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:01,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094403644] [2020-10-11 13:25:01,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719914601] [2020-10-11 13:25:01,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:01,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-11 13:25:01,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:25:01,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:25:01,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:25:01,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:25:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:01,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:25:01,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-11 13:25:01,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933655335] [2020-10-11 13:25:01,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:25:01,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:25:01,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:25:01,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:25:01,182 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-11 13:25:04,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:25:04,400 INFO L93 Difference]: Finished difference Result 151 states and 365 transitions. [2020-10-11 13:25:04,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-11 13:25:04,402 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-11 13:25:04,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:25:04,403 INFO L225 Difference]: With dead ends: 151 [2020-10-11 13:25:04,403 INFO L226 Difference]: Without dead ends: 145 [2020-10-11 13:25:04,403 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1224, Invalid=3606, Unknown=0, NotChecked=0, Total=4830 [2020-10-11 13:25:04,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-11 13:25:04,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2020-10-11 13:25:04,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 13:25:04,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-11 13:25:04,406 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-11 13:25:04,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:25:04,406 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-11 13:25:04,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:25:04,406 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-11 13:25:04,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:25:04,406 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:25:04,406 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:25:04,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:04,607 INFO L429 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:25:04,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:25:04,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1405297859, now seen corresponding path program 373 times [2020-10-11 13:25:04,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:25:04,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852626795] [2020-10-11 13:25:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:25:04,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:25:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:05,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852626795] [2020-10-11 13:25:05,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427578683] [2020-10-11 13:25:05,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:25:05,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:25:05,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:25:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:05,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:25:05,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-11 13:25:05,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362782646] [2020-10-11 13:25:05,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:25:05,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:25:05,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:25:05,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:25:05,658 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-11 13:25:08,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:25:08,568 INFO L93 Difference]: Finished difference Result 148 states and 359 transitions. [2020-10-11 13:25:08,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 13:25:08,570 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-11 13:25:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:25:08,571 INFO L225 Difference]: With dead ends: 148 [2020-10-11 13:25:08,571 INFO L226 Difference]: Without dead ends: 142 [2020-10-11 13:25:08,571 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1209, Invalid=3483, Unknown=0, NotChecked=0, Total=4692 [2020-10-11 13:25:08,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-11 13:25:08,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 111. [2020-10-11 13:25:08,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-11 13:25:08,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-11 13:25:08,573 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-11 13:25:08,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:25:08,574 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-11 13:25:08,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:25:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-11 13:25:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:25:08,574 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:25:08,574 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:25:08,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2020-10-11 13:25:08,775 INFO L429 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:25:08,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:25:08,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1013419993, now seen corresponding path program 374 times [2020-10-11 13:25:08,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:25:08,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360258211] [2020-10-11 13:25:08,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:25:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:25:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:09,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360258211] [2020-10-11 13:25:09,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773922512] [2020-10-11 13:25:09,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:09,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:25:09,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:25:09,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:25:09,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:25:09,887 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:25:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:09,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:25:09,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-11 13:25:09,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042648900] [2020-10-11 13:25:09,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:25:09,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:25:09,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:25:09,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:25:09,931 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-11 13:25:13,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:25:13,408 INFO L93 Difference]: Finished difference Result 147 states and 357 transitions. [2020-10-11 13:25:13,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-11 13:25:13,411 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-11 13:25:13,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:25:13,411 INFO L225 Difference]: With dead ends: 147 [2020-10-11 13:25:13,411 INFO L226 Difference]: Without dead ends: 141 [2020-10-11 13:25:13,412 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1310, Invalid=3802, Unknown=0, NotChecked=0, Total=5112 [2020-10-11 13:25:13,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-11 13:25:13,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 110. [2020-10-11 13:25:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 13:25:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-11 13:25:13,414 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-11 13:25:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:25:13,414 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-11 13:25:13,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:25:13,414 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-11 13:25:13,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:25:13,414 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:25:13,414 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:25:13,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2020-10-11 13:25:13,615 INFO L429 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:25:13,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:25:13,616 INFO L82 PathProgramCache]: Analyzing trace with hash -325098203, now seen corresponding path program 375 times [2020-10-11 13:25:13,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:25:13,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367818319] [2020-10-11 13:25:13,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:25:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:25:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:14,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367818319] [2020-10-11 13:25:14,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072703683] [2020-10-11 13:25:14,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:14,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-11 13:25:14,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:25:14,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:25:14,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:25:14,682 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:14,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:25:14,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-11 13:25:14,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415153143] [2020-10-11 13:25:14,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:25:14,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:25:14,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:25:14,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:25:14,684 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-11 13:25:17,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:25:17,752 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-10-11 13:25:17,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-11 13:25:17,754 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-11 13:25:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:25:17,755 INFO L225 Difference]: With dead ends: 144 [2020-10-11 13:25:17,755 INFO L226 Difference]: Without dead ends: 138 [2020-10-11 13:25:17,756 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1304, Invalid=3666, Unknown=0, NotChecked=0, Total=4970 [2020-10-11 13:25:17,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-11 13:25:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 111. [2020-10-11 13:25:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-11 13:25:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-11 13:25:17,759 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-11 13:25:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:25:17,759 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-11 13:25:17,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:25:17,759 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-11 13:25:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:25:17,759 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:25:17,760 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:25:17,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2020-10-11 13:25:17,969 INFO L429 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:25:17,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:25:17,970 INFO L82 PathProgramCache]: Analyzing trace with hash 660093321, now seen corresponding path program 376 times [2020-10-11 13:25:17,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:25:17,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006533550] [2020-10-11 13:25:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:25:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:25:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:18,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006533550] [2020-10-11 13:25:18,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995372239] [2020-10-11 13:25:18,930 INFO L93 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 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:18,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:25:18,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:25:18,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:25:18,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:25:19,054 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:25:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:19,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:25:19,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-11 13:25:19,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326742363] [2020-10-11 13:25:19,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:25:19,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:25:19,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:25:19,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:25:19,094 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-11 13:25:22,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:25:22,875 INFO L93 Difference]: Finished difference Result 143 states and 349 transitions. [2020-10-11 13:25:22,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-11 13:25:22,877 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-11 13:25:22,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:25:22,878 INFO L225 Difference]: With dead ends: 143 [2020-10-11 13:25:22,878 INFO L226 Difference]: Without dead ends: 137 [2020-10-11 13:25:22,879 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1412, Invalid=3990, Unknown=0, NotChecked=0, Total=5402 [2020-10-11 13:25:22,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-11 13:25:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 110. [2020-10-11 13:25:22,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 13:25:22,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-11 13:25:22,880 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-11 13:25:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:25:22,881 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-11 13:25:22,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:25:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-11 13:25:22,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:25:22,881 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:25:22,881 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:25:23,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2020-10-11 13:25:23,082 INFO L429 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:25:23,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:25:23,082 INFO L82 PathProgramCache]: Analyzing trace with hash -957065721, now seen corresponding path program 377 times [2020-10-11 13:25:23,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:25:23,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905162837] [2020-10-11 13:25:23,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:25:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:25:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:24,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905162837] [2020-10-11 13:25:24,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651135711] [2020-10-11 13:25:24,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:24,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-11 13:25:24,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:25:24,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:25:24,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:25:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:24,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:25:24,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-11 13:25:24,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370541188] [2020-10-11 13:25:24,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:25:24,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:25:24,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:25:24,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:25:24,174 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-11 13:25:27,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:25:27,520 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-10-11 13:25:27,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-11 13:25:27,523 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-11 13:25:27,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:25:27,523 INFO L225 Difference]: With dead ends: 140 [2020-10-11 13:25:27,524 INFO L226 Difference]: Without dead ends: 134 [2020-10-11 13:25:27,524 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1415, Invalid=3841, Unknown=0, NotChecked=0, Total=5256 [2020-10-11 13:25:27,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-11 13:25:27,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2020-10-11 13:25:27,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-11 13:25:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-11 13:25:27,527 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-11 13:25:27,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:25:27,527 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-11 13:25:27,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:25:27,527 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-11 13:25:27,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:25:27,528 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:25:27,528 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:25:27,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2020-10-11 13:25:27,728 INFO L429 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:25:27,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:25:27,729 INFO L82 PathProgramCache]: Analyzing trace with hash 299823979, now seen corresponding path program 378 times [2020-10-11 13:25:27,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:25:27,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968690089] [2020-10-11 13:25:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:25:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:25:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:28,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968690089] [2020-10-11 13:25:28,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605226484] [2020-10-11 13:25:28,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:28,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-11 13:25:28,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:25:28,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:25:28,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:25:28,840 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:25:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:28,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:25:28,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-11 13:25:28,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953196193] [2020-10-11 13:25:28,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:25:28,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:25:28,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:25:28,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:25:28,879 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-11 13:25:33,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:25:33,036 INFO L93 Difference]: Finished difference Result 139 states and 341 transitions. [2020-10-11 13:25:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-11 13:25:33,039 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-11 13:25:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:25:33,040 INFO L225 Difference]: With dead ends: 139 [2020-10-11 13:25:33,040 INFO L226 Difference]: Without dead ends: 133 [2020-10-11 13:25:33,040 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1530, Invalid=4170, Unknown=0, NotChecked=0, Total=5700 [2020-10-11 13:25:33,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-11 13:25:33,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 110. [2020-10-11 13:25:33,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 13:25:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-11 13:25:33,043 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-11 13:25:33,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:25:33,043 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-11 13:25:33,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:25:33,043 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-11 13:25:33,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:25:33,044 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:25:33,044 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:25:33,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2020-10-11 13:25:33,244 INFO L429 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:25:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:25:33,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1916016489, now seen corresponding path program 379 times [2020-10-11 13:25:33,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:25:33,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014297260] [2020-10-11 13:25:33,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:25:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:25:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:34,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014297260] [2020-10-11 13:25:34,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262456529] [2020-10-11 13:25:34,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:34,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:25:34,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:25:34,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:25:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:34,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:25:34,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-11 13:25:34,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530865647] [2020-10-11 13:25:34,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:25:34,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:25:34,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:25:34,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:25:34,342 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-11 13:25:37,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:25:37,862 INFO L93 Difference]: Finished difference Result 136 states and 335 transitions. [2020-10-11 13:25:37,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-11 13:25:37,865 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-11 13:25:37,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:25:37,865 INFO L225 Difference]: With dead ends: 136 [2020-10-11 13:25:37,865 INFO L226 Difference]: Without dead ends: 130 [2020-10-11 13:25:37,866 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1542, Invalid=4008, Unknown=0, NotChecked=0, Total=5550 [2020-10-11 13:25:37,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-11 13:25:37,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2020-10-11 13:25:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-11 13:25:37,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-11 13:25:37,868 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-11 13:25:37,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:25:37,868 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-11 13:25:37,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:25:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-11 13:25:37,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:25:37,868 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:25:37,868 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:25:38,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:38,069 INFO L429 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:25:38,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:25:38,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1859207731, now seen corresponding path program 380 times [2020-10-11 13:25:38,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:25:38,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317015811] [2020-10-11 13:25:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:25:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:25:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:39,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317015811] [2020-10-11 13:25:39,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421675786] [2020-10-11 13:25:39,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:39,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:25:39,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:25:39,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:25:39,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:25:39,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:25:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:39,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:25:39,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-11 13:25:39,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473055865] [2020-10-11 13:25:39,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:25:39,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:25:39,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:25:39,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:25:39,198 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-11 13:25:43,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:25:43,552 INFO L93 Difference]: Finished difference Result 135 states and 333 transitions. [2020-10-11 13:25:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-11 13:25:43,555 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-11 13:25:43,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:25:43,556 INFO L225 Difference]: With dead ends: 135 [2020-10-11 13:25:43,556 INFO L226 Difference]: Without dead ends: 129 [2020-10-11 13:25:43,556 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1664, Invalid=4342, Unknown=0, NotChecked=0, Total=6006 [2020-10-11 13:25:43,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-11 13:25:43,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-11 13:25:43,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 13:25:43,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-11 13:25:43,559 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-11 13:25:43,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:25:43,559 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-11 13:25:43,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:25:43,559 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-11 13:25:43,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:25:43,559 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:25:43,559 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:25:43,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:43,760 INFO L429 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:25:43,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:25:43,761 INFO L82 PathProgramCache]: Analyzing trace with hash -203896501, now seen corresponding path program 381 times [2020-10-11 13:25:43,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:25:43,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975147847] [2020-10-11 13:25:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:25:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:25:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:44,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975147847] [2020-10-11 13:25:44,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465425494] [2020-10-11 13:25:44,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:44,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-11 13:25:44,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:25:44,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:25:44,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:25:44,879 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:44,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:25:44,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-11 13:25:44,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899167710] [2020-10-11 13:25:44,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:25:44,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:25:44,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:25:44,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:25:44,880 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-11 13:25:48,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:25:48,657 INFO L93 Difference]: Finished difference Result 132 states and 327 transitions. [2020-10-11 13:25:48,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-11 13:25:48,660 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-11 13:25:48,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:25:48,660 INFO L225 Difference]: With dead ends: 132 [2020-10-11 13:25:48,660 INFO L226 Difference]: Without dead ends: 126 [2020-10-11 13:25:48,661 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1685, Invalid=4167, Unknown=0, NotChecked=0, Total=5852 [2020-10-11 13:25:48,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-11 13:25:48,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 111. [2020-10-11 13:25:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-11 13:25:48,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-11 13:25:48,663 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-11 13:25:48,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:25:48,663 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-11 13:25:48,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:25:48,664 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-11 13:25:48,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:25:48,664 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:25:48,664 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:25:48,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:48,871 INFO L429 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:25:48,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:25:48,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1924024145, now seen corresponding path program 382 times [2020-10-11 13:25:48,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:25:48,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485467344] [2020-10-11 13:25:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:25:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:25:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:49,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485467344] [2020-10-11 13:25:49,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353782599] [2020-10-11 13:25:49,852 INFO L93 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 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:49,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:25:49,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:25:49,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:25:49,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:25:49,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:25:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:50,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:25:50,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-11 13:25:50,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268535079] [2020-10-11 13:25:50,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:25:50,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:25:50,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:25:50,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:25:50,029 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-11 13:25:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:25:54,582 INFO L93 Difference]: Finished difference Result 131 states and 325 transitions. [2020-10-11 13:25:54,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-11 13:25:54,585 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-11 13:25:54,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:25:54,586 INFO L225 Difference]: With dead ends: 131 [2020-10-11 13:25:54,586 INFO L226 Difference]: Without dead ends: 125 [2020-10-11 13:25:54,587 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1814, Invalid=4506, Unknown=0, NotChecked=0, Total=6320 [2020-10-11 13:25:54,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-11 13:25:54,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2020-10-11 13:25:54,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 13:25:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-11 13:25:54,590 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-11 13:25:54,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:25:54,590 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-11 13:25:54,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:25:54,590 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-11 13:25:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:25:54,590 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:25:54,591 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:25:54,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:54,793 INFO L429 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:25:54,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:25:54,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1453028435, now seen corresponding path program 383 times [2020-10-11 13:25:54,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:25:54,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433396468] [2020-10-11 13:25:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:25:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:25:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:55,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433396468] [2020-10-11 13:25:55,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560896702] [2020-10-11 13:25:55,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:25:55,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-11 13:25:55,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:25:55,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:25:55,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:25:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:25:55,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:25:55,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-11 13:25:55,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412823054] [2020-10-11 13:25:55,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:25:55,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:25:55,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:25:55,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:25:55,889 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-11 13:25:59,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:25:59,923 INFO L93 Difference]: Finished difference Result 128 states and 319 transitions. [2020-10-11 13:25:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-11 13:25:59,926 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-11 13:25:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:25:59,927 INFO L225 Difference]: With dead ends: 128 [2020-10-11 13:25:59,927 INFO L226 Difference]: Without dead ends: 122 [2020-10-11 13:25:59,928 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1844, Invalid=4318, Unknown=0, NotChecked=0, Total=6162 [2020-10-11 13:25:59,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-11 13:25:59,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2020-10-11 13:25:59,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-11 13:25:59,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-10-11 13:25:59,929 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-10-11 13:25:59,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:25:59,930 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-10-11 13:25:59,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:25:59,930 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-10-11 13:25:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:25:59,930 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:25:59,930 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:26:00,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:00,131 INFO L429 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:26:00,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:26:00,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1436941295, now seen corresponding path program 384 times [2020-10-11 13:26:00,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:26:00,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936266485] [2020-10-11 13:26:00,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:26:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:26:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:01,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936266485] [2020-10-11 13:26:01,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627422182] [2020-10-11 13:26:01,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:01,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-11 13:26:01,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:26:01,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:26:01,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:26:01,245 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:26:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:01,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:26:01,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-11 13:26:01,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443416362] [2020-10-11 13:26:01,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:26:01,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:26:01,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:26:01,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:26:01,297 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-10-11 13:26:06,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:26:06,120 INFO L93 Difference]: Finished difference Result 127 states and 317 transitions. [2020-10-11 13:26:06,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-11 13:26:06,123 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-11 13:26:06,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:26:06,123 INFO L225 Difference]: With dead ends: 127 [2020-10-11 13:26:06,123 INFO L226 Difference]: Without dead ends: 121 [2020-10-11 13:26:06,124 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1980, Invalid=4662, Unknown=0, NotChecked=0, Total=6642 [2020-10-11 13:26:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-11 13:26:06,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2020-10-11 13:26:06,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-11 13:26:06,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-10-11 13:26:06,126 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-10-11 13:26:06,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:26:06,126 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-10-11 13:26:06,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:26:06,126 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-10-11 13:26:06,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:26:06,127 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:26:06,127 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:26:06,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:06,328 INFO L429 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:26:06,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:26:06,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1436451185, now seen corresponding path program 385 times [2020-10-11 13:26:06,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:26:06,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280796109] [2020-10-11 13:26:06,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:26:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:26:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:07,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280796109] [2020-10-11 13:26:07,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029986572] [2020-10-11 13:26:07,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:26:07,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:26:07,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:26:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:07,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:26:07,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-10-11 13:26:07,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197460029] [2020-10-11 13:26:07,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-11 13:26:07,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:26:07,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-11 13:26:07,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-10-11 13:26:07,464 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-10-11 13:26:11,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:26:11,558 INFO L93 Difference]: Finished difference Result 143 states and 357 transitions. [2020-10-11 13:26:11,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-11 13:26:11,561 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-10-11 13:26:11,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:26:11,561 INFO L225 Difference]: With dead ends: 143 [2020-10-11 13:26:11,561 INFO L226 Difference]: Without dead ends: 137 [2020-10-11 13:26:11,562 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2019, Invalid=4461, Unknown=0, NotChecked=0, Total=6480 [2020-10-11 13:26:11,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-11 13:26:11,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 114. [2020-10-11 13:26:11,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-11 13:26:11,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 297 transitions. [2020-10-11 13:26:11,564 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 297 transitions. Word has length 34 [2020-10-11 13:26:11,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:26:11,564 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 297 transitions. [2020-10-11 13:26:11,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-11 13:26:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 297 transitions. [2020-10-11 13:26:11,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:26:11,565 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:26:11,565 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:26:11,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2020-10-11 13:26:11,765 INFO L429 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:26:11,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:26:11,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1436434445, now seen corresponding path program 386 times [2020-10-11 13:26:11,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:26:11,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895463139] [2020-10-11 13:26:11,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:26:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:26:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:12,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895463139] [2020-10-11 13:26:12,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062570567] [2020-10-11 13:26:12,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:12,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:26:12,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:26:12,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:26:12,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:26:12,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:26:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:12,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:26:12,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-11 13:26:12,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271649948] [2020-10-11 13:26:12,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:26:12,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:26:12,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:26:12,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=712, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:26:12,953 INFO L87 Difference]: Start difference. First operand 114 states and 297 transitions. Second operand 31 states. [2020-10-11 13:26:17,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:26:17,929 INFO L93 Difference]: Finished difference Result 124 states and 313 transitions. [2020-10-11 13:26:17,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-11 13:26:17,932 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-11 13:26:17,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:26:17,933 INFO L225 Difference]: With dead ends: 124 [2020-10-11 13:26:17,933 INFO L226 Difference]: Without dead ends: 116 [2020-10-11 13:26:17,934 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2162, Invalid=4810, Unknown=0, NotChecked=0, Total=6972 [2020-10-11 13:26:17,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-11 13:26:17,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 81. [2020-10-11 13:26:17,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-11 13:26:17,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 198 transitions. [2020-10-11 13:26:17,936 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 198 transitions. Word has length 34 [2020-10-11 13:26:17,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:26:17,936 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 198 transitions. [2020-10-11 13:26:17,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:26:17,936 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 198 transitions. [2020-10-11 13:26:17,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-11 13:26:17,936 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:26:17,936 INFO L421 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:26:18,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2020-10-11 13:26:18,137 INFO L429 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:26:18,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:26:18,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1849519723, now seen corresponding path program 387 times [2020-10-11 13:26:18,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:26:18,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612036290] [2020-10-11 13:26:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:26:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:26:19,227 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:19,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612036290] [2020-10-11 13:26:19,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397364132] [2020-10-11 13:26:19,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:19,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-10-11 13:26:19,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:26:19,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-11 13:26:19,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:26:19,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:26:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:19,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:26:19,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-10-11 13:26:19,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710163480] [2020-10-11 13:26:19,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:26:19,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:26:19,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:26:19,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:26:19,434 INFO L87 Difference]: Start difference. First operand 81 states and 198 transitions. Second operand 31 states. [2020-10-11 13:26:24,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:26:24,194 INFO L93 Difference]: Finished difference Result 148 states and 363 transitions. [2020-10-11 13:26:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-11 13:26:24,198 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-10-11 13:26:24,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:26:24,199 INFO L225 Difference]: With dead ends: 148 [2020-10-11 13:26:24,199 INFO L226 Difference]: Without dead ends: 143 [2020-10-11 13:26:24,199 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2233, Invalid=4739, Unknown=0, NotChecked=0, Total=6972 [2020-10-11 13:26:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-11 13:26:24,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 112. [2020-10-11 13:26:24,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-11 13:26:24,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 289 transitions. [2020-10-11 13:26:24,201 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 289 transitions. Word has length 34 [2020-10-11 13:26:24,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:26:24,201 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 289 transitions. [2020-10-11 13:26:24,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:26:24,202 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 289 transitions. [2020-10-11 13:26:24,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:26:24,202 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:26:24,202 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:26:24,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable388,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:24,404 INFO L429 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:26:24,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:26:24,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1579778528, now seen corresponding path program 388 times [2020-10-11 13:26:24,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:26:24,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19658390] [2020-10-11 13:26:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:26:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:26:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:25,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19658390] [2020-10-11 13:26:25,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546118518] [2020-10-11 13:26:25,495 INFO L93 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 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:25,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:26:25,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:26:25,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:26:25,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:26:25,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-11 13:26:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:25,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:26:25,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-11 13:26:25,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230429896] [2020-10-11 13:26:25,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-11 13:26:25,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:26:25,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-11 13:26:25,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:26:25,693 INFO L87 Difference]: Start difference. First operand 112 states and 289 transitions. Second operand 32 states. [2020-10-11 13:26:30,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:26:30,677 INFO L93 Difference]: Finished difference Result 120 states and 309 transitions. [2020-10-11 13:26:30,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-11 13:26:30,681 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-11 13:26:30,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:26:30,681 INFO L225 Difference]: With dead ends: 120 [2020-10-11 13:26:30,681 INFO L226 Difference]: Without dead ends: 115 [2020-10-11 13:26:30,682 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2255, Invalid=4885, Unknown=0, NotChecked=0, Total=7140 [2020-10-11 13:26:30,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-11 13:26:30,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2020-10-11 13:26:30,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-11 13:26:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 202 transitions. [2020-10-11 13:26:30,684 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 202 transitions. Word has length 35 [2020-10-11 13:26:30,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:26:30,684 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 202 transitions. [2020-10-11 13:26:30,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-11 13:26:30,684 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 202 transitions. [2020-10-11 13:26:30,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:26:30,684 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:26:30,684 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:26:30,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2020-10-11 13:26:30,885 INFO L429 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:26:30,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:26:30,886 INFO L82 PathProgramCache]: Analyzing trace with hash -484633973, now seen corresponding path program 389 times [2020-10-11 13:26:30,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:26:30,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723814029] [2020-10-11 13:26:30,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:26:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:26:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:32,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723814029] [2020-10-11 13:26:32,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981124591] [2020-10-11 13:26:32,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:32,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-11 13:26:32,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:26:32,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:26:32,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:26:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:32,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:26:32,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-11 13:26:32,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192248555] [2020-10-11 13:26:32,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:26:32,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:26:32,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:26:32,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:26:32,348 INFO L87 Difference]: Start difference. First operand 82 states and 202 transitions. Second operand 31 states. [2020-10-11 13:26:34,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:26:34,459 INFO L93 Difference]: Finished difference Result 126 states and 293 transitions. [2020-10-11 13:26:34,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-11 13:26:34,462 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-11 13:26:34,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:26:34,462 INFO L225 Difference]: With dead ends: 126 [2020-10-11 13:26:34,462 INFO L226 Difference]: Without dead ends: 120 [2020-10-11 13:26:34,463 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1053, Invalid=2253, Unknown=0, NotChecked=0, Total=3306 [2020-10-11 13:26:34,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-11 13:26:34,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2020-10-11 13:26:34,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-11 13:26:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 221 transitions. [2020-10-11 13:26:34,465 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 221 transitions. Word has length 35 [2020-10-11 13:26:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:26:34,465 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 221 transitions. [2020-10-11 13:26:34,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:26:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 221 transitions. [2020-10-11 13:26:34,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:26:34,465 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:26:34,465 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:26:34,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:34,666 INFO L429 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:26:34,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:26:34,667 INFO L82 PathProgramCache]: Analyzing trace with hash -603414801, now seen corresponding path program 390 times [2020-10-11 13:26:34,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:26:34,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664291571] [2020-10-11 13:26:34,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:26:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:26:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:36,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664291571] [2020-10-11 13:26:36,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714052528] [2020-10-11 13:26:36,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:36,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-11 13:26:36,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:26:36,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:26:36,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:26:36,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:26:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:36,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:26:36,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-11 13:26:36,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918064864] [2020-10-11 13:26:36,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-11 13:26:36,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:26:36,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-11 13:26:36,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:26:36,216 INFO L87 Difference]: Start difference. First operand 90 states and 221 transitions. Second operand 32 states. [2020-10-11 13:26:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:26:38,521 INFO L93 Difference]: Finished difference Result 154 states and 349 transitions. [2020-10-11 13:26:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-11 13:26:38,524 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-11 13:26:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:26:38,524 INFO L225 Difference]: With dead ends: 154 [2020-10-11 13:26:38,524 INFO L226 Difference]: Without dead ends: 148 [2020-10-11 13:26:38,525 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1062, Invalid=2478, Unknown=0, NotChecked=0, Total=3540 [2020-10-11 13:26:38,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-11 13:26:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 88. [2020-10-11 13:26:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-11 13:26:38,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 217 transitions. [2020-10-11 13:26:38,526 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 217 transitions. Word has length 35 [2020-10-11 13:26:38,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:26:38,527 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 217 transitions. [2020-10-11 13:26:38,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-11 13:26:38,527 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 217 transitions. [2020-10-11 13:26:38,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:26:38,527 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:26:38,527 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:26:38,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable391 [2020-10-11 13:26:38,728 INFO L429 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:26:38,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:26:38,728 INFO L82 PathProgramCache]: Analyzing trace with hash 193462125, now seen corresponding path program 391 times [2020-10-11 13:26:38,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:26:38,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414006540] [2020-10-11 13:26:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:26:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:26:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:40,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414006540] [2020-10-11 13:26:40,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270987979] [2020-10-11 13:26:40,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:26:40,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:26:40,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:26:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:40,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:26:40,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-11 13:26:40,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002457681] [2020-10-11 13:26:40,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:26:40,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:26:40,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:26:40,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:26:40,194 INFO L87 Difference]: Start difference. First operand 88 states and 217 transitions. Second operand 31 states. [2020-10-11 13:26:42,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:26:42,616 INFO L93 Difference]: Finished difference Result 155 states and 353 transitions. [2020-10-11 13:26:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-11 13:26:42,619 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-11 13:26:42,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:26:42,619 INFO L225 Difference]: With dead ends: 155 [2020-10-11 13:26:42,619 INFO L226 Difference]: Without dead ends: 149 [2020-10-11 13:26:42,620 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1061, Invalid=2599, Unknown=0, NotChecked=0, Total=3660 [2020-10-11 13:26:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-11 13:26:42,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 91. [2020-10-11 13:26:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-11 13:26:42,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 225 transitions. [2020-10-11 13:26:42,622 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 225 transitions. Word has length 35 [2020-10-11 13:26:42,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:26:42,622 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 225 transitions. [2020-10-11 13:26:42,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:26:42,622 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 225 transitions. [2020-10-11 13:26:42,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:26:42,622 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:26:42,622 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:26:42,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:42,823 INFO L429 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:26:42,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:26:42,824 INFO L82 PathProgramCache]: Analyzing trace with hash -235711279, now seen corresponding path program 392 times [2020-10-11 13:26:42,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:26:42,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423872100] [2020-10-11 13:26:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:26:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:26:44,208 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:44,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423872100] [2020-10-11 13:26:44,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267734790] [2020-10-11 13:26:44,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:44,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:26:44,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:26:44,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:26:44,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:26:44,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:26:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:44,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:26:44,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-11 13:26:44,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492043337] [2020-10-11 13:26:44,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-11 13:26:44,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:26:44,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-11 13:26:44,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:26:44,371 INFO L87 Difference]: Start difference. First operand 91 states and 225 transitions. Second operand 32 states. [2020-10-11 13:26:46,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:26:46,840 INFO L93 Difference]: Finished difference Result 179 states and 401 transitions. [2020-10-11 13:26:46,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-11 13:26:46,843 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-11 13:26:46,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:26:46,844 INFO L225 Difference]: With dead ends: 179 [2020-10-11 13:26:46,844 INFO L226 Difference]: Without dead ends: 173 [2020-10-11 13:26:46,844 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1105, Invalid=2801, Unknown=0, NotChecked=0, Total=3906 [2020-10-11 13:26:46,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-11 13:26:46,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 90. [2020-10-11 13:26:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-11 13:26:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 223 transitions. [2020-10-11 13:26:46,847 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 223 transitions. Word has length 35 [2020-10-11 13:26:46,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:26:46,847 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 223 transitions. [2020-10-11 13:26:46,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-11 13:26:46,847 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 223 transitions. [2020-10-11 13:26:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:26:46,847 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:26:46,848 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:26:47,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,390 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:47,048 INFO L429 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:26:47,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:26:47,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1244445903, now seen corresponding path program 393 times [2020-10-11 13:26:47,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:26:47,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283115858] [2020-10-11 13:26:47,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:26:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:26:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:48,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283115858] [2020-10-11 13:26:48,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873653750] [2020-10-11 13:26:48,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:48,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-10-11 13:26:48,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:26:48,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:26:48,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:26:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:48,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:26:48,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-11 13:26:48,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015365102] [2020-10-11 13:26:48,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:26:48,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:26:48,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:26:48,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:26:48,461 INFO L87 Difference]: Start difference. First operand 90 states and 223 transitions. Second operand 31 states. [2020-10-11 13:26:51,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:26:51,038 INFO L93 Difference]: Finished difference Result 179 states and 403 transitions. [2020-10-11 13:26:51,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-11 13:26:51,042 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-11 13:26:51,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:26:51,042 INFO L225 Difference]: With dead ends: 179 [2020-10-11 13:26:51,042 INFO L226 Difference]: Without dead ends: 173 [2020-10-11 13:26:51,043 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1118, Invalid=2914, Unknown=0, NotChecked=0, Total=4032 [2020-10-11 13:26:51,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-11 13:26:51,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 93. [2020-10-11 13:26:51,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-11 13:26:51,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 231 transitions. [2020-10-11 13:26:51,045 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 231 transitions. Word has length 35 [2020-10-11 13:26:51,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:26:51,045 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 231 transitions. [2020-10-11 13:26:51,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:26:51,045 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 231 transitions. [2020-10-11 13:26:51,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:26:51,046 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:26:51,046 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:26:51,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:51,247 INFO L429 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:26:51,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:26:51,247 INFO L82 PathProgramCache]: Analyzing trace with hash -579462349, now seen corresponding path program 394 times [2020-10-11 13:26:51,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:26:51,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553428793] [2020-10-11 13:26:51,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:26:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:26:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:52,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553428793] [2020-10-11 13:26:52,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952212254] [2020-10-11 13:26:52,634 INFO L93 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 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:52,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:26:52,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:26:52,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:26:52,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:26:52,765 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:26:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:52,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:26:52,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-11 13:26:52,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785066495] [2020-10-11 13:26:52,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-11 13:26:52,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:26:52,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-11 13:26:52,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:26:52,792 INFO L87 Difference]: Start difference. First operand 93 states and 231 transitions. Second operand 32 states. [2020-10-11 13:26:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:26:55,573 INFO L93 Difference]: Finished difference Result 176 states and 397 transitions. [2020-10-11 13:26:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-11 13:26:55,577 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-11 13:26:55,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:26:55,577 INFO L225 Difference]: With dead ends: 176 [2020-10-11 13:26:55,577 INFO L226 Difference]: Without dead ends: 170 [2020-10-11 13:26:55,578 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1118, Invalid=3042, Unknown=0, NotChecked=0, Total=4160 [2020-10-11 13:26:55,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-11 13:26:55,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 92. [2020-10-11 13:26:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-11 13:26:55,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 229 transitions. [2020-10-11 13:26:55,580 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 229 transitions. Word has length 35 [2020-10-11 13:26:55,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:26:55,581 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 229 transitions. [2020-10-11 13:26:55,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-11 13:26:55,581 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 229 transitions. [2020-10-11 13:26:55,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:26:55,581 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:26:55,581 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:26:55,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:55,782 INFO L429 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:26:55,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:26:55,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1404736847, now seen corresponding path program 395 times [2020-10-11 13:26:55,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:26:55,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273281798] [2020-10-11 13:26:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:26:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:26:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:57,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273281798] [2020-10-11 13:26:57,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764764741] [2020-10-11 13:26:57,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:26:57,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-11 13:26:57,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:26:57,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:26:57,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:26:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:26:57,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:26:57,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-11 13:26:57,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133402135] [2020-10-11 13:26:57,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:26:57,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:26:57,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:26:57,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:26:57,163 INFO L87 Difference]: Start difference. First operand 92 states and 229 transitions. Second operand 31 states. [2020-10-11 13:26:59,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:26:59,918 INFO L93 Difference]: Finished difference Result 177 states and 401 transitions. [2020-10-11 13:26:59,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-11 13:26:59,922 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-11 13:26:59,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:26:59,922 INFO L225 Difference]: With dead ends: 177 [2020-10-11 13:26:59,922 INFO L226 Difference]: Without dead ends: 171 [2020-10-11 13:26:59,923 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1146, Invalid=3144, Unknown=0, NotChecked=0, Total=4290 [2020-10-11 13:26:59,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-11 13:26:59,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 95. [2020-10-11 13:26:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-11 13:26:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 237 transitions. [2020-10-11 13:26:59,925 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 237 transitions. Word has length 35 [2020-10-11 13:26:59,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:26:59,925 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 237 transitions. [2020-10-11 13:26:59,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:26:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 237 transitions. [2020-10-11 13:26:59,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:26:59,926 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:26:59,926 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:27:00,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:27:00,126 INFO L429 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:27:00,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:27:00,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1851462165, now seen corresponding path program 396 times [2020-10-11 13:27:00,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:27:00,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051737611] [2020-10-11 13:27:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:27:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:27:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:01,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051737611] [2020-10-11 13:27:01,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085511542] [2020-10-11 13:27:01,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:27:01,477 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-11 13:27:01,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:27:01,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:27:01,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:27:01,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:27:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:01,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:27:01,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-11 13:27:01,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715909753] [2020-10-11 13:27:01,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-11 13:27:01,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:27:01,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-11 13:27:01,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:27:01,581 INFO L87 Difference]: Start difference. First operand 95 states and 237 transitions. Second operand 32 states. [2020-10-11 13:27:04,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:27:04,624 INFO L93 Difference]: Finished difference Result 174 states and 395 transitions. [2020-10-11 13:27:04,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-11 13:27:04,628 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-11 13:27:04,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:27:04,628 INFO L225 Difference]: With dead ends: 174 [2020-10-11 13:27:04,629 INFO L226 Difference]: Without dead ends: 168 [2020-10-11 13:27:04,629 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1147, Invalid=3275, Unknown=0, NotChecked=0, Total=4422 [2020-10-11 13:27:04,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-11 13:27:04,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 94. [2020-10-11 13:27:04,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-11 13:27:04,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 235 transitions. [2020-10-11 13:27:04,632 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 235 transitions. Word has length 35 [2020-10-11 13:27:04,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:27:04,632 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 235 transitions. [2020-10-11 13:27:04,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-11 13:27:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 235 transitions. [2020-10-11 13:27:04,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:27:04,632 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:27:04,632 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:27:04,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2020-10-11 13:27:04,833 INFO L429 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:27:04,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:27:04,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2028721901, now seen corresponding path program 397 times [2020-10-11 13:27:04,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:27:04,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183190456] [2020-10-11 13:27:04,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:27:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:27:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:06,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183190456] [2020-10-11 13:27:06,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133484478] [2020-10-11 13:27:06,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:27:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:27:06,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:27:06,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:27:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:06,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:27:06,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-11 13:27:06,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048755562] [2020-10-11 13:27:06,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:27:06,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:27:06,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:27:06,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:27:06,177 INFO L87 Difference]: Start difference. First operand 94 states and 235 transitions. Second operand 31 states. [2020-10-11 13:27:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:27:09,173 INFO L93 Difference]: Finished difference Result 175 states and 399 transitions. [2020-10-11 13:27:09,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-11 13:27:09,177 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-11 13:27:09,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:27:09,177 INFO L225 Difference]: With dead ends: 175 [2020-10-11 13:27:09,177 INFO L226 Difference]: Without dead ends: 169 [2020-10-11 13:27:09,177 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1190, Invalid=3366, Unknown=0, NotChecked=0, Total=4556 [2020-10-11 13:27:09,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-11 13:27:09,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 97. [2020-10-11 13:27:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-11 13:27:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 243 transitions. [2020-10-11 13:27:09,180 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 243 transitions. Word has length 35 [2020-10-11 13:27:09,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:27:09,180 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 243 transitions. [2020-10-11 13:27:09,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:27:09,180 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 243 transitions. [2020-10-11 13:27:09,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:27:09,181 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:27:09,181 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:27:09,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:27:09,381 INFO L429 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:27:09,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:27:09,382 INFO L82 PathProgramCache]: Analyzing trace with hash 544495991, now seen corresponding path program 398 times [2020-10-11 13:27:09,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:27:09,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853089118] [2020-10-11 13:27:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:27:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:27:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:10,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853089118] [2020-10-11 13:27:10,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813210532] [2020-10-11 13:27:10,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:27:10,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:27:10,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:27:10,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:27:10,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:27:10,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:27:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:10,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:27:10,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-11 13:27:10,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716876424] [2020-10-11 13:27:10,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-11 13:27:10,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:27:10,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-11 13:27:10,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:27:10,802 INFO L87 Difference]: Start difference. First operand 97 states and 243 transitions. Second operand 32 states. [2020-10-11 13:27:14,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:27:14,112 INFO L93 Difference]: Finished difference Result 172 states and 393 transitions. [2020-10-11 13:27:14,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-11 13:27:14,116 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-11 13:27:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:27:14,116 INFO L225 Difference]: With dead ends: 172 [2020-10-11 13:27:14,116 INFO L226 Difference]: Without dead ends: 166 [2020-10-11 13:27:14,116 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1192, Invalid=3500, Unknown=0, NotChecked=0, Total=4692 [2020-10-11 13:27:14,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-11 13:27:14,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 96. [2020-10-11 13:27:14,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-11 13:27:14,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 241 transitions. [2020-10-11 13:27:14,119 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 241 transitions. Word has length 35 [2020-10-11 13:27:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:27:14,119 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 241 transitions. [2020-10-11 13:27:14,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-11 13:27:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 241 transitions. [2020-10-11 13:27:14,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:27:14,119 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:27:14,119 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:27:14,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2020-10-11 13:27:14,320 INFO L429 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:27:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:27:14,321 INFO L82 PathProgramCache]: Analyzing trace with hash -639428619, now seen corresponding path program 399 times [2020-10-11 13:27:14,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:27:14,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172299743] [2020-10-11 13:27:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:27:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:27:15,536 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:15,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172299743] [2020-10-11 13:27:15,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682177102] [2020-10-11 13:27:15,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:27:15,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-10-11 13:27:15,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:27:15,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:27:15,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:27:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:15,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:27:15,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-11 13:27:15,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300075186] [2020-10-11 13:27:15,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:27:15,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:27:15,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:27:15,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:27:15,644 INFO L87 Difference]: Start difference. First operand 96 states and 241 transitions. Second operand 31 states. [2020-10-11 13:27:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:27:18,829 INFO L93 Difference]: Finished difference Result 173 states and 397 transitions. [2020-10-11 13:27:18,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-11 13:27:18,832 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-11 13:27:18,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:27:18,833 INFO L225 Difference]: With dead ends: 173 [2020-10-11 13:27:18,833 INFO L226 Difference]: Without dead ends: 167 [2020-10-11 13:27:18,834 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1250, Invalid=3580, Unknown=0, NotChecked=0, Total=4830 [2020-10-11 13:27:18,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-11 13:27:18,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 99. [2020-10-11 13:27:18,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-11 13:27:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 249 transitions. [2020-10-11 13:27:18,836 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 249 transitions. Word has length 35 [2020-10-11 13:27:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:27:18,836 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 249 transitions. [2020-10-11 13:27:18,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:27:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 249 transitions. [2020-10-11 13:27:18,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:27:18,836 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:27:18,836 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:27:19,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2020-10-11 13:27:19,037 INFO L429 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:27:19,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:27:19,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2107380057, now seen corresponding path program 400 times [2020-10-11 13:27:19,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:27:19,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049683283] [2020-10-11 13:27:19,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:27:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:27:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:20,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049683283] [2020-10-11 13:27:20,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828962759] [2020-10-11 13:27:20,298 INFO L93 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 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:27:20,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-11 13:27:20,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:27:20,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:27:20,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:27:20,433 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:27:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:20,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:27:20,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-11 13:27:20,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393454681] [2020-10-11 13:27:20,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-11 13:27:20,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:27:20,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-11 13:27:20,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:27:20,472 INFO L87 Difference]: Start difference. First operand 99 states and 249 transitions. Second operand 32 states. [2020-10-11 13:27:24,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:27:24,113 INFO L93 Difference]: Finished difference Result 170 states and 391 transitions. [2020-10-11 13:27:24,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-11 13:27:24,117 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-11 13:27:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:27:24,118 INFO L225 Difference]: With dead ends: 170 [2020-10-11 13:27:24,118 INFO L226 Difference]: Without dead ends: 164 [2020-10-11 13:27:24,118 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1253, Invalid=3717, Unknown=0, NotChecked=0, Total=4970 [2020-10-11 13:27:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-11 13:27:24,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 98. [2020-10-11 13:27:24,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-11 13:27:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 247 transitions. [2020-10-11 13:27:24,121 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 247 transitions. Word has length 35 [2020-10-11 13:27:24,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:27:24,121 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 247 transitions. [2020-10-11 13:27:24,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-11 13:27:24,121 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 247 transitions. [2020-10-11 13:27:24,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:27:24,121 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:27:24,121 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:27:24,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:27:24,322 INFO L429 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:27:24,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:27:24,322 INFO L82 PathProgramCache]: Analyzing trace with hash 805590871, now seen corresponding path program 401 times [2020-10-11 13:27:24,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:27:24,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486945454] [2020-10-11 13:27:24,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:27:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:27:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:25,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486945454] [2020-10-11 13:27:25,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494417034] [2020-10-11 13:27:25,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:27:25,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-10-11 13:27:25,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:27:25,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:27:25,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:27:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:25,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:27:25,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-11 13:27:25,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60064005] [2020-10-11 13:27:25,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:27:25,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:27:25,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:27:25,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:27:25,611 INFO L87 Difference]: Start difference. First operand 98 states and 247 transitions. Second operand 31 states. [2020-10-11 13:27:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:27:28,968 INFO L93 Difference]: Finished difference Result 171 states and 395 transitions. [2020-10-11 13:27:28,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-11 13:27:28,971 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-11 13:27:28,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:27:28,972 INFO L225 Difference]: With dead ends: 171 [2020-10-11 13:27:28,972 INFO L226 Difference]: Without dead ends: 165 [2020-10-11 13:27:28,973 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1326, Invalid=3786, Unknown=0, NotChecked=0, Total=5112 [2020-10-11 13:27:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-11 13:27:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 101. [2020-10-11 13:27:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-11 13:27:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 255 transitions. [2020-10-11 13:27:28,975 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 255 transitions. Word has length 35 [2020-10-11 13:27:28,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:27:28,975 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 255 transitions. [2020-10-11 13:27:28,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:27:28,975 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 255 transitions. [2020-10-11 13:27:28,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:27:28,976 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:27:28,976 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:27:29,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2020-10-11 13:27:29,176 INFO L429 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:27:29,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:27:29,177 INFO L82 PathProgramCache]: Analyzing trace with hash -4957765, now seen corresponding path program 402 times [2020-10-11 13:27:29,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:27:29,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988302526] [2020-10-11 13:27:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:27:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:27:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:30,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988302526] [2020-10-11 13:27:30,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860872878] [2020-10-11 13:27:30,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:27:30,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-10-11 13:27:30,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:27:30,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:27:30,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:27:30,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:27:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:30,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:27:30,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-11 13:27:30,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204001272] [2020-10-11 13:27:30,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-11 13:27:30,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:27:30,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-11 13:27:30,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:27:30,562 INFO L87 Difference]: Start difference. First operand 101 states and 255 transitions. Second operand 32 states. [2020-10-11 13:27:34,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:27:34,359 INFO L93 Difference]: Finished difference Result 168 states and 389 transitions. [2020-10-11 13:27:34,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-11 13:27:34,363 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-11 13:27:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:27:34,364 INFO L225 Difference]: With dead ends: 168 [2020-10-11 13:27:34,364 INFO L226 Difference]: Without dead ends: 162 [2020-10-11 13:27:34,364 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1330, Invalid=3926, Unknown=0, NotChecked=0, Total=5256 [2020-10-11 13:27:34,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-11 13:27:34,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 100. [2020-10-11 13:27:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-11 13:27:34,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 253 transitions. [2020-10-11 13:27:34,367 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 253 transitions. Word has length 35 [2020-10-11 13:27:34,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:27:34,367 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 253 transitions. [2020-10-11 13:27:34,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-11 13:27:34,367 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 253 transitions. [2020-10-11 13:27:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:27:34,367 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:27:34,367 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:27:34,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2020-10-11 13:27:34,568 INFO L429 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:27:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:27:34,569 INFO L82 PathProgramCache]: Analyzing trace with hash 47318841, now seen corresponding path program 403 times [2020-10-11 13:27:34,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:27:34,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15374660] [2020-10-11 13:27:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:27:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:27:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:35,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15374660] [2020-10-11 13:27:35,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319978128] [2020-10-11 13:27:35,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:27:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:27:35,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:27:35,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:27:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:35,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:27:35,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-11 13:27:35,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894850982] [2020-10-11 13:27:35,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:27:35,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:27:35,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:27:35,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:27:35,841 INFO L87 Difference]: Start difference. First operand 100 states and 253 transitions. Second operand 31 states. [2020-10-11 13:27:39,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:27:39,381 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-11 13:27:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-11 13:27:39,385 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-10-11 13:27:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:27:39,385 INFO L225 Difference]: With dead ends: 169 [2020-10-11 13:27:39,385 INFO L226 Difference]: Without dead ends: 163 [2020-10-11 13:27:39,386 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1418, Invalid=3984, Unknown=0, NotChecked=0, Total=5402 [2020-10-11 13:27:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-11 13:27:39,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 103. [2020-10-11 13:27:39,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-11 13:27:39,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 261 transitions. [2020-10-11 13:27:39,388 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 261 transitions. Word has length 35 [2020-10-11 13:27:39,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:27:39,388 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 261 transitions. [2020-10-11 13:27:39,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-11 13:27:39,388 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 261 transitions. [2020-10-11 13:27:39,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:27:39,389 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:27:39,389 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:27:39,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:27:39,589 INFO L429 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:27:39,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:27:39,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1923568285, now seen corresponding path program 404 times [2020-10-11 13:27:39,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:27:39,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015295323] [2020-10-11 13:27:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:27:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:27:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:40,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015295323] [2020-10-11 13:27:40,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029700914] [2020-10-11 13:27:40,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:27:40,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-11 13:27:40,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:27:40,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:27:40,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:27:40,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-11 13:27:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:40,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:27:40,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-10-11 13:27:40,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594662168] [2020-10-11 13:27:40,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-11 13:27:40,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:27:40,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-11 13:27:40,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2020-10-11 13:27:40,909 INFO L87 Difference]: Start difference. First operand 103 states and 261 transitions. Second operand 32 states. [2020-10-11 13:27:44,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-11 13:27:44,985 INFO L93 Difference]: Finished difference Result 166 states and 387 transitions. [2020-10-11 13:27:44,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-11 13:27:44,988 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-10-11 13:27:44,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-11 13:27:44,989 INFO L225 Difference]: With dead ends: 166 [2020-10-11 13:27:44,989 INFO L226 Difference]: Without dead ends: 160 [2020-10-11 13:27:44,989 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1423, Invalid=4127, Unknown=0, NotChecked=0, Total=5550 [2020-10-11 13:27:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-11 13:27:44,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 102. [2020-10-11 13:27:44,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-11 13:27:44,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 259 transitions. [2020-10-11 13:27:44,992 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 259 transitions. Word has length 35 [2020-10-11 13:27:44,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-11 13:27:44,992 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 259 transitions. [2020-10-11 13:27:44,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-11 13:27:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 259 transitions. [2020-10-11 13:27:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-11 13:27:44,992 INFO L413 BasicCegarLoop]: Found error trace [2020-10-11 13:27:44,992 INFO L421 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-11 13:27:45,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:27:45,193 INFO L429 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-11 13:27:45,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-11 13:27:45,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1683077221, now seen corresponding path program 405 times [2020-10-11 13:27:45,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-11 13:27:45,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689735427] [2020-10-11 13:27:45,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-11 13:27:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-11 13:27:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:46,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689735427] [2020-10-11 13:27:46,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001376377] [2020-10-11 13:27:46,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:27:46,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-10-11 13:27:46,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-11 13:27:46,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2020-10-11 13:27:46,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-11 13:27:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-11 13:27:46,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-11 13:27:46,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2020-10-11 13:27:46,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762542448] [2020-10-11 13:27:46,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-11 13:27:46,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-11 13:27:46,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-11 13:27:46,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2020-10-11 13:27:46,454 INFO L87 Difference]: Start difference. First operand 102 states and 259 transitions. Second operand 31 states. Received shutdown request... [2020-10-11 13:27:50,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-11 13:27:50,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-11 13:27:50,440 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-11 13:27:50,444 WARN L235 ceAbstractionStarter]: Timeout [2020-10-11 13:27:50,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 01:27:50 BasicIcfg [2020-10-11 13:27:50,445 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-11 13:27:50,447 INFO L168 Benchmark]: Toolchain (without parser) took 850697.51 ms. Allocated memory was 250.6 MB in the beginning and 222.8 MB in the end (delta: -27.8 MB). Free memory was 205.1 MB in the beginning and 137.4 MB in the end (delta: 67.8 MB). Peak memory consumption was 40.0 MB. Max. memory is 14.2 GB. [2020-10-11 13:27:50,447 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 250.6 MB. Free memory is still 227.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-11 13:27:50,448 INFO L168 Benchmark]: CACSL2BoogieTranslator took 682.79 ms. Allocated memory was 250.6 MB in the beginning and 313.0 MB in the end (delta: 62.4 MB). Free memory was 205.1 MB in the beginning and 266.4 MB in the end (delta: -61.3 MB). Peak memory consumption was 26.7 MB. Max. memory is 14.2 GB. [2020-10-11 13:27:50,448 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.11 ms. Allocated memory is still 313.0 MB. Free memory was 266.4 MB in the beginning and 263.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 13:27:50,449 INFO L168 Benchmark]: Boogie Preprocessor took 26.40 ms. Allocated memory is still 313.0 MB. Free memory was 263.9 MB in the beginning and 261.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-11 13:27:50,449 INFO L168 Benchmark]: RCFGBuilder took 375.64 ms. Allocated memory is still 313.0 MB. Free memory was 261.4 MB in the beginning and 242.1 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. [2020-10-11 13:27:50,450 INFO L168 Benchmark]: TraceAbstraction took 849552.38 ms. Allocated memory was 313.0 MB in the beginning and 222.8 MB in the end (delta: -90.2 MB). Free memory was 242.1 MB in the beginning and 137.4 MB in the end (delta: 104.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 14.2 GB. [2020-10-11 13:27:50,452 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 250.6 MB. Free memory is still 227.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 682.79 ms. Allocated memory was 250.6 MB in the beginning and 313.0 MB in the end (delta: 62.4 MB). Free memory was 205.1 MB in the beginning and 266.4 MB in the end (delta: -61.3 MB). Peak memory consumption was 26.7 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 47.11 ms. Allocated memory is still 313.0 MB. Free memory was 266.4 MB in the beginning and 263.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.40 ms. Allocated memory is still 313.0 MB. Free memory was 263.9 MB in the beginning and 261.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 375.64 ms. Allocated memory is still 313.0 MB. Free memory was 261.4 MB in the beginning and 242.1 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 849552.38 ms. Allocated memory was 313.0 MB in the beginning and 222.8 MB in the end (delta: -90.2 MB). Free memory was 242.1 MB in the beginning and 137.4 MB in the end (delta: 104.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 57 PlacesBefore, 20 PlacesAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 911 MoverChecksTotal - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was constructing difference of abstraction (102states) and FLOYD_HOARE automaton (currently 48 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 75 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 849.4s, OverallIterations: 407, TraceHistogramMax: 14, AutomataDifference: 551.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 6555 SDtfs, 28134 SDslu, 49240 SDs, 0 SdLazy, 56190 SolverSat, 40735 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29346 GetRequests, 9397 SyntacticMatches, 402 SemanticMatches, 19546 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265283 ImplicationChecksByTransitivity, 606.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=387, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 406 MinimizatonAttempts, 13159 StatesRemovedByMinimization, 405 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.2s SsaConstructionTime, 10.2s SatisfiabilityAnalysisTime, 188.2s InterpolantComputationTime, 20872 NumberOfCodeBlocks, 20872 NumberOfCodeBlocksAsserted, 2594 NumberOfCheckSat, 20063 ConstructedInterpolants, 0 QuantifiedInterpolants, 2481895 SizeOfPredicates, 7198 NumberOfNonLiveVariables, 61718 ConjunctsInSsa, 8812 ConjunctsInUnsatCore, 809 InterpolantComputations, 5 PerfectInterpolantSequences, 0/65624 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown